Worm Gear Pair · 2019-03-28 · Worm Gear Pair. 355. Catalog Number of KHK Stock Gears. The Catalog Number for KHK stock gears is based on the simple formula listed below. Please

Worm Gear Pair

355

Catalog Number of KHK Stock GearsThe Catalog Number for KHK stock gears is based on the simple formula listed below. Please order KHK gears by specifying the Catalog Numbers.

Worm Gear Pair(Example)

Sp

urG

ears

Hel

ical

Gea

rsIn

tern

alG

ears

Rac

ksC

P R

acks

& P

inio

nsM

iter

Gea

rsB

evel

Gea

rsS

crew

Gea

rsW

orm

Gea

r P

airs

Bev

elG

earb

oxes

Oth

erP

rod

ucts

Worms

K W G DL 2 - R1Hand thread & Number of Starts (Right hand, Single thread)Module (2)Type (Duplex Worm)

Others (Ground Gear)

Type ( Worm)

Material (SCM440)

Material TypeK SCM440 W WormsS S45C DL Duplex WormsSU SUS303 Other Information

G Ground GearsS Worm Shafts

Material TypeA CAC702(*AℓBC2) G Worm WheelsB CAC502(*PBC2) DL Duplex WormsC FC200D Polyacetal * ( ) indicates old JIS designationP MC901

Worm Wheels

A G 1.5 - 20 R2Hand thread & Number of starts(Right hand, Double thread)Number of teeth (20)Module (1.5)

Type (Worm Wheel)

Material (CAC702)

KWGDL/KWGDLSDuplex Worms

m1.5 ～ 4 Page 364

Heat Treatment: Thermal refined / gear teeth induction hardened

Precision: KHK 1Material: SCM440

AGDLDuplex Worm Wheels

m1.5 ～ 4 Page 366

Reduction Ratio 20 ～ 60

Precision: KHK 1Material: CAC702 (AℓBC2)

AGFWorm Wheels

m2 ～ 6 Page 376



DGPlastic Worm Wheels

m0.5, 0.8 Page 406


Precision: KHK 5Material: Polyacetal

PGPlastic Worm Wheels

m1 ～ 3 Page 408


Precision: KHK 5Material: MC901

KWGGround Worm Shafts

m0.5 ～ 6 Page 372

Precision: KHK 2Material: SCM440

Heat Treatment: Thermal refined / gear teeth induction hardened

AGWorm Wheels

m0.5 ～ 1.5 Page 372



Series

SWGGround Worms

m1 ～ 6 Page 382

Heat Treatment: Gear teeth induction hardened

Precision: KHK 2Material: S45C

Series

AGWorm Wheels

m1 ～ 6 Page 382



Series

SWSteel Worms

m0.5 ～ 6 Page 390

Precision: KHK 4Material: S45C

Series

BGBronze Worm Wheels

m0.5 ～ 6 Page 390


Precision: KHK 4Material: CAC502(PBC2)

Series

CGGray Iron Worm Wheels

m1 ～ 6 Page 392


Precision: KHK 4Material: FC200

Series

SUWStainless Steel Worms

m0.5 ～ 3 Page 406

Precision: KHK 4Material: SUS303

Series

KHK Technical Information

356 357

Characteristics

Worm Gear Pair

〔NOTE 1〕 The material of cast hubs for AGF and AG worm wheels is FC200(Cast Iron). AG worm wheels mate primarily with SWG worms. But, for Mod-ules 0.8 or smaller, AG worm wheels mate with KWG worms.

〔NOTE 2〕 KHK stock worms and worm wheels are produced to KHK’s own precision grades. See the “Precision of Worms and Worm Wheels” in the “Se-lection Hints” section.

The simplest way to obtain a large speed reduction with high torque in a compact space is with worm gear drives. KHK stock worms and worm wheels are available in modules 0.5 to 6 and in speed ratios of 1/10 to 1/120, made in a variety of materials and styles. We also offer stock duplex worms and worm wheels with which you can obtain a very low backlash, high rotational precision system. The following table lists the main features for easy selection.

Type Catalog No. Module No. of threadsor reduction ratio

Material （）JIS

Heat treat-ment

Tooth surface finish

Precision KHK W 001KHK W 002NOTE 2

Features

Duplex Worms & Worm Wheels

Worm KWGDL 2 ～ 4 Single thread SCM440Thermal refined, gear teeth induc-tion hardened

Ground 1High-precision duplex worms with superior strength. A range of backlash values can be obtained by moving the worm axially.

Worm KWGDLS 1.5 ～ 4 Single thread SCM440Thermal refined, gear teeth induc-tion hardened

Ground 1High-precision duplex worms with superior strength. Arange of backlash values can be obtained by moving theworm axially.

Worm Wheel AGDL 1.5 ～ 4 20 ～ 60 CAC702

（AℓBC2） ― Cut 1 Duplex worm wheels made of aluminum bronze, excellent in wear-resistance. The pitch accuracy is first grade.

Worm

s & W

orm W

heels

Worm KWG 0.5 ～ 6 Single thread - Double thread SCM440

Thermal refined, gear teeth induc-tion hardened

Ground 2Ground finished worms with a shaft, including tooth surface quenching treatment. Allows compact design due to having small reference diameters.

Worm Wheel AG NOTE 1 0.5 ～ 1.5 10 ～ 60 CAC702

（AℓBC2） ― Cut 2 Made of aluminum bronze, have excellent wear-resistance. Wide selection is available for this item.

Worm Wheel AGF NOTE 1 2 ～ 6 10 ～ 60 CAC702

（AℓBC2） ― Cut 2 Made of aluminum bronze, have excellent wear-resistance. Allows compact design.

Worm SWG 1 ～ 6 Single thread - Triple thread S45C

Gear teeth induction hardened

Ground 2 Reasonably priced ground worms. Ready-to-use finished J Series products are also available.

Worm Wheel AG NOTE 1 1 ～ 6 10 ～ 60 CAC702

（AℓBC2） ― Cut 2 Made of aluminum bronze, have excellent wear-resistance. Wide selection is available for this item.

Worm SW 0.5 ～ 6 Single thread - Double thread S45C ―

Cut （Thread

rolled）4

Economical, commonly used worms that have broad utility. Ready-to-use finished J Series products are also available.

Worm SUW 0.5 ～ 3 Single thread - Double thread SUS303 ― Cut 4

Rust-resistant worms made of stainless steel suitable for mating with DG or PG worm wheels. Finished J Series products are also available.

Worm Wheel BG 0.5 ～ 6 10 ～ 60 CAC502

（PBC2） ― Cut 4Phosphorous bronze worm wheels have excellent wear resistance. Interchangeable with CG Worm Wheels, and enhances strength.

Worm Wheel CG 1 ～ 6 10 ～ 120 FC200 ― Cut 4

Economical, commonly used worm wheels that have broad utility. Available with a large selection of modules and number of teeth.

Worm Wheel DG 0.5 ～ 0.8 10 ～ 60 Polyacetal ― Cut 5 Fine pitch worm wheels made of polyacetal, a stable

plastic material.

Worm Wheel PG 1 ～ 3 10 ～ 50 MC901 ― Cut 5

Light weight and strong MC Nylon worm wheels. Suitable for use in food machinery, and can be used without lubricant.

High-precision ground gear worms are available.We use screw grinding machines manufactured by DRAKE, USA, to manufacture high-precision ground worms of module 0.5 to 8.

CNC Screw Grinding Machine (TE-LM200)

Worm ground gear machining range

Maximum gear accuracy

KHK Grade 1

Maximum module m8

Maximum nominal lead angle

± 35°

Maximum outer diameter

φ 200mm

Maximum length 330mm

Application ExamplesKHK stock worm gears are used in a wide range of fields, including reduction gears and positioning mechanisms.

Image: Provided by PK Design

Worm gear used for rotating tables (design example)

SW worm and CG worm wheel used for rotating large pansKWGDL used for indexing and driving, for accurate filling of a fixed amount of ingredients Duplex Worms and AGDL Wheels■ Gonio Stage Design Example

■ Yaesu Steam Kettle

SW worm and BG worm wheel used for adjusting height

■ Masdac Food Filling Device

■ Fabric Feeding Device

■ Wiper Drive Device

Worm gear used for the oscillating mechanism of wipers

Worm Gear Pair KHK Technical Information

358 359

Please select the most suitable products by carefully considering the characteristics of items and contents of the product ta-bles. It is also important to read all applicable “CAUTION” notes shown below before the final selection. Use of catalog numbers when ordering will simplify and expedite the processing of your order.

Selection Hints

Worms and worm wheels have either right-hand or left-hand helix. The same hand worms and worm wheels comprise sets. However, the number of threads and whether they use normal module or axial module system must also be matched. The table below shows avail-able combinations of KHK stock worms and worm wheels.

1. Caution in Selecting the Mating Gears

Worm KWGDL KWGDLS KWG SWG SW SUW

Mating Worm Wheel NOTE 1

Helix/Thread R1 R1 R2 R1 R2 R3 R1 R2 L1 L2 R1 R2

AGDL R1 ○AG0.5~1.5AGF

R1 ○R2 ○

AGR1 ○R2 ○R3 ○

BG

R1 ○ ○R2 ○ ○L1 ○L2 ○

CG

R1 ○ ○R2 ○ ○L1 ○L2 ○

PG R1 ○ ○R2 ○ ○

DG R1 ○ ○R2 ○ ○

■ Mating Worm Wheels Selection Chart

〔NOTE 1〕 Select the same module for both members.

The gear strength values shown in the product pages were compute by assuming a certain application environment as shown below. Therefore, they should be used as reference only. We recommend that each user computes their own values by applying the actual usage conditions.

2. Caution in Selecting Gears Based on Gear Strength

Catalog No.

Item

KWGDL・KWGDLS/AGDLKWG/AGF, SWG/AG SW/BG SW/CG SUW/PG SUW/DG

Formula NOTE 2 Formula of worm gear's strength（JGMA405-01） The Lewis formulaRotational speed of the worm 600rpm 100rpm Allowable bending stress（kgf/mm2）Lubricant Lubricant for gears with proper viscosity and with anti-pressure additives

1.15（40OC with No

Lubrication）

　　　 NOTE 3

1（40OC with No

Lubrication）

Lubrication Oil bathStarting condition Starting torque less than 200% of rated torque. Less than 2 starts per hourDesign Life (Durability) 26000 hoursImpact from motor Uniform loadImpact from load Uniform loadAllowable stress factor Sclim 0.67 0.70 0.42

■ Calculation assumptions for Bending Strength ■ Calculation assumptions for Surface Durability

〔NOTE 2〕The gear strength formula is based on JGMA (Japanese Gear Manufacturer’s Association) specifications and “MC Nylon Technical Data” by Nippon Polypenco Limited. The units for the rotational speed (rpm) and the stress (kgf/mm2) are adjusted to the units needed in the formula.

〔NOTE 3〕Allowable bending stress of DG worm wheel is the value we estimated.

■ The Helixes of Worms and Worm Wheels

RH single thread LH single thread

RH double thread LH double thread

右 1条左 1条

右 2条左 2条

■ウォームギヤのねじれ方向

右 1条左 1条

右 2条左 2条

■ウォームギヤのねじれ方向

When selecting KHK standard gears, glance over the Cautions on Product Characteristics and Cautions on Performing Secondary Operations in the respective dimension tables. ① Products not listed in this catalog or materials, modules, number of teeth and the like not listed in the dimensional

tables can be manufactured as custom items. Please see Page 16 for more details about custom-made orders. ② The color and shape of the product images listed on the dimension table page of each product may differ

from the actual product. Be sure to confirm the shape in the dimension table before selection. ③ The details (specifications, dimensions, prices, etc.) listed in the catalog may be changed without prior

notice. Changes are announced on the KHK website. Website URL: https://khkgears.net/Overseas Sales Department: TEL: 81-48-254-1744 FAX: 81-48-254-1765 E-mail: [email protected]

■ Maximum seizing allowable sliding speed of each worm gear

Catalog number Maximum seizing allowable sliding speed (m/s)

AGDL 15AGF 15AG 15BG 10CG 2.5PG 1 (Not lubricated)

＊＊＊＊＊

The maximum seizing allowable sliding speed of each worm gear is shown in the table below. Sliding speed should be calculated when making a selection.

Sliding speed　νs（m/s）

νs＝dn

19100 cos γ

d : Worm pitch dia. n : Worm rotational speed γ : Worm nominal lead angle

＊ From JGMA405-01

The most important factor in selecting gears is the gear strength.

■ Definition of Surface Durability

The surface durability of a gear is defined as the allowable tangential force at the pitch circle, which permits the force to be transmitted safely without incurring surface failure. The allowable gear tooth load of a gear is defined as the allowable tangential force at the pitch circle based on the mutual gear tooth strength of two meshing gears under load

Example of wear due to insufficient surface durability

Step 1 Use the actual load torque applied to the gear and the sliding speed to determine the worm gear suitable for the purpose.

Step 2 Select provisionally from the allowable torque table of the Master Catalog based on the load torque.

■ For provisional selection from the Master Catalog

378

Sp

urG

ears

Hel

ical

Gea

rsIn

tern

alG

ears

Rac

ksC

P R

acks

& P

inio

nsM

iter

Gea

rsB

evel

Gea

rsS

crew

Gea

rsW

orm

Gea

r P

airs

Bev

elG

earb

oxes

Oth

erP

rod

ucts

Ground Worm ShaftsModule 1、1.5KWG

JM NLK O

S R P Q S

GGGG

W6

Catalog No.Axial

moduleNumber of

startsLead angle Hand thread Shape

Total length Shaft length (L) Neck length (L) Face width Neck length (R) Shaft length (R) Pitch dia.

J K L M N O P

KWG1-R1KWG1-R2 m1 1

23°35'7°08'

RR

W6W6

140140

3535

1010

3030

1010

5555

1616

KWG1.5-R1KWG1.5-R2 m1.5 1

23°26'6°51'

RR

W6W6

190190

5050

1515

4040

1515

7070

2525

GE F

J

A B D’DC

H1

① These worms produce axial thrust forces. See Page 366 for more details.

① The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 362 for more details.

Catalog No.Reduction

ratioNo. of teeth

Number of starts

Helixangle

Handthread

Shape AH7 B C D D' E F G

AG1-20R1AG1-20R2AG1-30R1AG1-30R2AG1-40R1

2010301540

2020303040

12121

3°35'7°08'3°35'7°08'3°35'

RRRRR

H1H1H1H1H1

66668

1616202026

2020303040

2222323242

2323333343

10 10 20

AG1-50R1AG1-60R1

5060

5060

11

3°35'3°35'

RR

H1H1

810

3035

5060

5262

5363

AG1.5-20R1AG1.5-20R2AG1.5-30R1AG1.5-30R2AG1.5-40R1

2010301540

2020303040

12121

3°26'6°51'3°26'6°51'3°26'

RRRRR

H1H1H1H1H1

88

101012

2222303035

3030454560

3333484863

34.534.549.549.564.5

14 10 24

AG1.5-50R1AG1.5-60R1

5060

5060

11

3°26'3°26'

RR

H1H1

1212

4550

7590

7893

79.594.5

[Caution on Product Characteristics]


[Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 366) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.

（H）（ I ） JAllowable torque (N·m) NOTE 1 Backlash

(mm)

Weight

(kg)30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm

―――――

―――――

1818232328

3.353.317.087.03

12.1

2.792.695.985.84

10.2

2.232.064.844.568.43

1.831.684.053.727.12

1.631.483.633.336.38

1.501.353.313.035.86

1.301.152.922.635.13

0.08~0.190.08~0.190.08~0.190.08~0.190.08~0.19

0.0380.0380.0780.0780.13

――――

3338

18.325.6

15.521.8

12.918.1

10.915.4

9.8714.1

9.0912.9

7.9511.4

0.08~0.190.08~0.19

0.200.29

―――――

―――――

27.5 27.5 353542.5

9.849.72

20.820.735.6

8.187.87

17.517.130.0

6.405.92

13.913.124.2

5.304.87

11.710.820.6

4.684.25

10.49.56

18.3

4.253.839.408.58

16.6

3.683.278.287.46

14.6

0.10~0.210.10~0.210.10~0.210.10~0.210.10~0.21

0.100.100.220.220.37

――――

5057.5

53.875.3

45.463.8

36.951.9

31.644.7

28.340.4

25.836.7

22.632.4

0.10~0.210.10~0.21

0.590.83

NOTE 1 : Allowable torque based on worm speed (rpm)

Specifications

Precision grade KHK W 001 grade 2Referencesection of gear Axial

Gear teeth Standard full depth

Normalpressure angle 20°

Material SCM440

Heat treatment Thermal refined, tooth surfaceinduction hardened

Tooth hardness 50～ 60HRC

Surface treatment Black oxide coated except for ground part

Specifications

Precision grade KHK W 002 grade 2

Referencesection of gear Rotating plane

Gear teeth Standard full depthNormalpressure angle 20°

Material CAC702 (formerly JIS AlBC2)Heat treatment ―Tooth hardness ―

＊ The precision grade of J Series products is equivalent to the value shown in the table.

AH7 Bore

B Hub dia.

C Pitch dia.

D Throat dia.

D' Outside dia.

E Face width

F Hub width

G Length

（H） Web thickness

（ I ）Web O.D.

J Mounting distance

Worm WheelsModule 1、1.5AG

Step 3 We recommend that each user computes their own values by applying the actual usage conditions to determine the suitability of the gear strength.

Calculate the strength formally using the various gear strength formulas. Please see Page 97 of our technical reference book for more details.

Strength confirmation is simple when using the website.

Worm Gear Pair KHK Technical Information

360 361

The precision standards of KHK stock worms and worm wheels are established by us. The table below indicates the tolerance ranges for our products.

3. Selecting Worms and Worm Wheels by Precision

KHK established allowable profile and lead errors of worms with precision grades 1 to 4, by using the JIS Standard as refer-ence. Lead errors are measured over one full revolution.

Grade Error

Module

over m0.4up to1

over m1up to 1.6

over m1.6up to 2.5

over m2.5up to 4

over m4up to 6

1Tooth profile error 8 12 16 20 25Lead error 7 9 11 13 16


3Tooth profile erro 16 23 30 37 50Lead error 20 23 27 33 37


■ Precision Grades of Worm Wheels (KHK W 002)

We have established standard grades 1 to 5 of worm wheels using the JIS Standard as reference. The allowable values of Single Pitch Error and Runout Error are defined for each module size and pitch diameter.

Unit：μm

Grade Error

Over m0.4 up to 1 Over m1 up to 1.6 Over m1.6 up to 2.5 Over m2.5 up to 4 Over m4 up to 6Pitch diameter (mm)

6 up to 12

12 up to 25

25 up to 50

50 up to 100

100 up to 200

12 up to 25

25 up to 50

50 up to 100

100 up to 200

200 up to 400

12 up to 25

25 up to 50

50 up to 100

100 up to 200

200 up to 400

25 up to 50

50 up to 100

100 up to 200

200 up to 400

400 up to 800

25 up to 50

50 up to 100

100 up to 200

200 up to 400

400 up to 800

1Single pitch error 5 6 7 7 9 6 7 8 9 10 7 7 8 9 11 8 9 10 11 13 9 10 11 13 14Total composite error 21 24 26 30 34 25 28 31 35 41 27 30 33 37 43 33 36 40 46 53 37 40 45 50 57





■ Overall Length Tolerance of Worms

① Precision of worms（KHK W 001）

② Precision of worm wheels (KHK W 002)

③ Overall Length Tolerance of Worms

■ Precision Grades of Worms (KHK W 001) (Unit: μm)

Series Total length(mm) Tolerance

KWGDL Uniform0

－ 0.10

SWGSWSUW

Less than 1000

－ 0.15

Over 1000

－ 0.20

KWGDLSKWG Uniform Normal tolerance

■ Overall Length Tolerance of Worms Wheels

Total length(mm) Tolerance

below 300

－ 0.10

over 30 up to 1000

－ 0.15

over 1000

－ 0.20〔CAUTION〕 PG Plastic Wheels are excluded.

The efficiency of power transmission varies somewhat with the conditions of assembly and lubricant, but is generally 30 ～90% (excludes losses from bearings and churning of lubricants). The efficiency of KHK stock worm gear pair is given below as a reference. To learn more about strength calculations, please refer to the technical information contained in the “Surface Durability of Cylindrical Worm Gearing” section on Page 96.

4. Cautions in Selecting Worm Gears Based on Efficiency

Worm rpm

Catalog No.100 300 600 900 1200 1800

KWG0.5-R1 30 34 38 41 43 46KWG0.8-R1 35 40 44 47 49 53KWG1-R1 34 40 45 48 51 54KWG1.5-R1 35 42 47 51 53 57KWG2-R1 45 51 56 60 62 65KWG2.5-R1 44 51 57 61 62 67KWG3-R1 44 52 58 61 64 67KWG4-R1 50 58 64 66 70 72KWG5-R1 51 60 66 69 71 73KWG6-R1 53 61 66 70 72 75KWG0.5-R2 46 50 54 58 60 63KWG0.8-R2 51 56 61 64 66 69KWG1-R2 51 56 62 64 67 70KWG1.5-R2 52 59 64 67 69 73KWG2-R2 61 67 71 74 76 78KWG2.5-R2 60 67 72 75 76 80KWG3-R2 61 68 73 75 78 80KWG4-R2 66 73 77 79 82 84

Worm rpm

Catalog No.100 300 600 900 1200 1800

SWG1-R1 34 40 45 48 51 54SWG1.5-R1 35 42 47 51 53 57SWG2-R1 38 45 51 55 56 61SWG2.5-R1 40 48 54 57 60 63SWG3-R1 41 49 55 58 62 65SWG4-R1 42 51 56 61 63 67SWG5-R1 46 54 60 64 66 70SWG6-R1 48 57 64 66 68 73SWG1-R2 51 56 62 64 67 70SWG1.5-R2 52 59 64 67 69 73SWG2-R2 55 62 67 70 72 75SWG2.5-R2 57 64 69 72 75 77SWG3-R2 58 66 71 73 76 78SWG4-R2 59 67 72 75 77 80SWG5-R2 62 70 75 78 79 82SWG6-R2 65 72 77 80 81 84SWG3-R3 67 74 78 80 82 84SWG4-R3 68 75 79 82 83 86

■ Efficiency of KWGDLS/AGDL Worm Gear Pair ( %)(rpm ＝ Rotation of worm)

■ Efficiency of KWG/AG, AGF Worm Gear Pair ( %)(rpm ＝ Rotation of worm)

■ Efficiency of SWG/AG Worm Gear Pair ( %)(rpm ＝ Rotation of worm)

Self-locking is defined as the inability of worm wheels to drive the worms. Factors affecting the self-locking feature include the materials of the worm and worm wheel, lead angle, pre-cision of manufacture, types of bearings, lubricant, etc. Thus, it is not dependent simply on the lead angle. But, in general, self-locking will occur when the lead angle in a single thread worm is less than 4。. For systems requiring fail-safe prevention of back drive, we recommend other braking mechanisms or one-way clutches.

■ Efficiency of SW, SUM / CG, BG, PG Worm Gear Pair ( %)The efficiency is approximately as follows, depending on the assembly, loading, lubrication and rotational speed.

Catalog No. Thread Efficiency（％）

SW/SUWSingle thread 40 ～ 50％Double thread 50 ～ 60％

Worm rpm

Catalog No.100 300 600 900 1200 1800

KWGDL1.5-R1 35 42 47 51 53 57KWGDL2-R1 38 45 51 55 56 61KWGDL2.5-R1 40 48 54 57 60 63KWGDL3-R1 41 49 55 58 62 65KWGDL3.5-R1 42 50 56 61 62 65KWGDL4-R1 42 51 56 61 63 67

① Efficiency of Worm Gear Pair

② Self-Locking Feature of Worm Gear Pair

362 363

① If you are reboring, it is important to pay special attention to locating the center in order to avoid runout. (Fig.1) The reference datum for gear cutting or grinding is the bore. (For worm shafts, it is ground portion of the shaft.) Therefore, use the bore or shaft for locating the center. If it is too difficult to do for small bores, the alternative is to use one spot on the bore and the runout of the side surface.

② To open up the bore to its maximum, calculate the bore size so that the tooth strength is weaker than the strength of the remaining material.

For machining the maximum bore diameter, it should be designed so that the thickness between hub diameter (or root diameter) to bore diameter has more strength than the gear strength. As a guide, the maximum machined bore diameter should be within 60% to 70% of the hub diameter (or root diameter). When the keyway is processed, it should be 50% to 60%. As well, because the cast FC200 boss is weaker and more brittle than other steels, sufficient thickness strength is required. Note that the guideline is about 10% lower again.

③ Since DG worm wheels are molded products, they may have air bubbles inside the material. In case you find air bubbles inside when performing secondary operations, and if the bubbles are found to be troublesome, please contact your KHK distributor.

Worm Gear Pair

Application Hints

2. Caution on Performing Secondary Operations

If chucking operation using scroll chucks is to be done, we recommend the use of new or rebored jaws for improved precision.

Fig.1

3. Points of Caution in Assembling

Lathe Operation

① KHK stock worms and worm wheels are designed such that when assembled according to the specified mounting distance with a tolerance of H7 to H8, the normal direction backlash shown in the product tables is obtained. Do not attempt to eliminate backlash by pushing worms into worm wheels or op-erate with the worm shifted in the direction along the tooth.

② The figure below shows the datum clamp face of a worm wheel. When assembling worm gears, be sure that the worm axis is in the center of the worm wheel face width.

③ Because of the helix of the gear teeth, worms and worm wheels produce axial thrust forces. The directions of thrust depend on the hand of the helix and the direction of rotation. This is illustrat-ed below in Fig.2. The bearings must be selected properly to be able to handle these thrust forces. See the “Gear Forces” section in separate technical reference book for more details (Page 107).

④ Because large thrust forces act on worms, if they are not se-cured to the shaft firmly, they tend to shift. Use of step shafts, set screws, dowel pins, etc., are recommended. Also, check for loosening of bearings due to thrust forces.

In order to use KHK stock worms and worm wheels safely, carefully read the Application Hints before proceeding. If there are questions or you require clarifications, please contact our technical department or your nearest distributor.

▪ TEL: 81-48-254-1744 FAX: 81-48-254-1765 E-mail: [email protected]

AA

A

R helical

Driver Thrust bearing

Thrust bearing

Driver

Driver Driver

L helical

Fig.2

Direction of rotation and thrust force

Hub - one side Hub - both sides Ring geometry

Datum Clamp Face

KHK Technical Information

4. Verifying the orientation of assembly

● Verify that the worm axis is perpendicular to the worm wheel axis.

● Check that the worm axis is in the center of the worm wheel face width.

● Check the mounting distance (allowable mounting dis-tance H7 ～ H8).

● Confirm that the center of the worm wheel goes through the midpoint of the worm length.

BadGood Good

RH LH

Bad

Error Error

RH LH

ErrorError Error Error

The worm cannot rotate correctly if the worm wheel is engaged close to either end of its length.

BadGood BadGood

How well the worms and worm wheels are assembled has large effects on the friction of the unit. The tooth contact at the time of assembly must be checked for correctness as shown below. See the “Tooth Contact of a Worm Gear Pair” section in separate technical reference book for more details (Page 67).

1. Cautions on Handling ① KHK products are packaged one by one to prevent scratches and dents,

but if you find issues such as rust, scratches, or dents when the product is removed from the box after purchase, please contact the supplier.

② Depending on the handling method, the product may become deformed or damaged. Resin gears and ring gears deform particularly easily, so please handle with care.

KHK considers safety a priority in the use of our products. When handling, adding secondary operations, assembling, and operating KHK products, please be aware of the following issues in order to prevent accidents.

Warning: Precautions for preventing physical and property damage

Cautions in Preventing Accidents

1. When using KHK products, follow relevant safety regulations (Occupational Safety and Health Regulations, etc.). 2. Pay attention to the following items when installing, removing, or performing maintenance and inspection of the product. ① Turn off the power switch. ② Do not reach or crawl under the product. ③ Wear appropriate clothing and protective equipment for the work.

1. Before using a KHK product, read the precautions in the catalog carefully in order to use it correctly. 2. Avoid use in environments that may adversely affect the product. 3. Our products are manufactured under a superior quality control system based on the ISO9000 quality management system; if you notice any

malfunctions upon purchasing a product, please contact the supplier.

① Check the following items before starting. • Are the gears installed securely? • Is there uneven tooth contact? • Is there adequate backlash? Be sure to avoid zero-backlash. • Has proper lubrication been supplied?② If gears are exposed, be sure to attach a safety cover to

ensure safety. Also, be careful not to touch rotating gears.③ Gears can be lubricated with the “grease lubrication

method”, “splash lubrication method (oil bath method),” or “forced lubrication method (circulation lubrication method)”. For initial operation, the lubricant may

deteriorate markedly, so check the condition of the lubricant after starting. For more technical information, please see the section “Gear Lubrication” (Page 112) of our technical reference book.

④ If there is any abnormality such as noise or vibration during startup, check the gears and assembly condition. “High gear accuracy”, “smooth gear teeth surface” and “correct tooth contact” are some of the measures against gear noise. For more technical information, please see the section “Gear Noise and Countermeasures” (Page 119) of our technical reference book.

5. Cautions on Starting

364 365

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Duplex Worm GearsKWGDL・KWGDLS & AGDL

■ Description of duplex worm gearsThe usual method of adjusting the backlash of a worm gear assem-bly is to modify the center distance. Once assembled, such adjust-ment requires a major rework of the gearbox housing. The use of duplex worm gears allows the backlash adjustment to be made by axially shifting the worm. This simplifies greatly the assembly and maintenance operations. Because of the unique characteristics of the product, please take time to study its construction and proper use.

■ Backlash adjustment mechanism and method of adjustment

〔CAUTION〕The amount of change in backlash ( △ j mm) in relation to the axial movement of the duplex worm shaft (V mm) can be calculated from the formula below.

Wherema ＝ Nominal Axial Module －（0.01 × Nominal Axial Module）mb ＝ Nominal Axial Module ＋（0.01 × Nominal Axial Module）

Δ j ＝ 2V mb － mama ＋ mb

〔CAUTION〕 The KHK duplex worm is designed so that, for all modules, the backlash reduces by 0.02 mm when the worm is shifted 1 mm.

Fig.1

■ Application Examples

Adjustment by using Screws * Adjustment by using Shims *

Fig. 2

Adjusting Screw Adjusting Shim

The dual-lead worm is formed to give a difference between the right tooth surface and left tooth surface so that it provides a unique tooth profile in which the tooth thickness varies continuously, corresponding with the lead difference. (Fig.1)The worm gear is also formed in its right and left tooth surface.When such a worm and worm gear are set up at a constant assembly distance and the worm is moved in the axial direction, the tooth thickness of the worm in mesh with the worm gear changes making backlash adjustment possible.

An arrow marking on the outer circumference of the hub of the KHK duplex worm indicates the direction of assembly as well as acts as a guide for the backlash adjustment.When the worm is held with arrow mark pointing right, the tooth thickness is thinner on the right and thicker on the left. Therefore, moving the worm to the right causes the thicker teeth to come into actual engagement with the worm gear, thereby reducing the backlash. (Fig.2)

(a tooth surface pitch) (b tooth surface pitch)

b tooth surface a tooth surface

(Nom

inal su

rface

)

Reference tooth

Moving the worm in the direction of the arrow causes the backlash to decrease.

* The illustration above is a design example, not a design for machinery or a device in actual use.

Arrow mark indicates the correct orientation of two gears when assembled. As shown, the two arrows must point in the same direction.

■ Point of caution during assemblyKHK duplex worm gears differs in module between the right and left tooth surface and, therefore, you must orient the worm and worm wheel properly. Please carefully verify the following two aspects be-fore proceeding with assembly.

1. Verifying the orientation of assembly An arrow indicating the orientation of assembly is stamped on both the duplex worm and worm wheel. When assembling

the worm and worm wheel, check the worm wheel of the arrow mark on the front such that the direction of arrow mark on the worm coincides with that on the worm wheel. Should the assembly be incorrect, the center distance “a” will become larger than the normal distance, resulting in difficulty of assembly and improper gear engagement. (Fig.3)

2. Verifying the reference positionA V-groove (60 ,゚ 0.3 mm deep line) on tip peripheral of the duplex worm tooth marks the reference tooth. The gear set is designat-ed to have a backlash of nearly zero ( ± 0.045) when the reference tooth is positioned in alignment with the center of rotation of the worm wheel with the center distance set at the value "a". (Fig.4)

Fig. 3

Fig. 4

Reference toothReference tooth

Cen

ter d

ista

nce

Duplex Worm Gears

KWGDL・KWGDLS & AGDL

Cen

ter d

ista

nce

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You can download CAD data (DXF format) of KHK Products from the Web Catalog. 366 367

Module 1.5、2

Module 1.5、2

Catalog No.Nominal axial

moduleNumber of

startsNominal

lead angleHand thread Shape

Bore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length

LH7 M N O P Q RKWGDL2-R1 m2 1 3°41' R W4 14 25 31 35 36 14 50


moduleNumber of

startsNominal



J K L M N O PKWGDLS1.5-R1 m1.5 1 3°26' R W6 190 66 12 28 18 66 25KWGDLS2-R1 m2 1 3°41' R W6 220 75 13 36 21 75 31


ratioNominal axial

moduleNo. of teeth

Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width

AH7 B C D D' E F

AGDL1.5-20R1AGDL1.5-30R1AGDL1.5-36R1AGDL1.5-40R1AGDL1.5-50R1AGDL1.5-60R1

203036405060

m1.5

203036405060

3°26'3°26'3°26'3°26'3°26'3°26'

RRRRRR

H1H1H1H1H1H1

81010121212

223035354550

304554607590

334857637893

34.549.558.564.579.594.5

141414141414

101010101010

AGDL2-20R1AGDL2-30R1AGDL2-36R1AGDL2-40R1AGDL2-50R1AGDL2-60R1

203036405060

m2

203036405060

3°41'3°41'3°41'3°41'3°41'3°41'

RRRRRR

H1H1H1H1H1H1

121515151515

334045455060

40607280

100120

44647684

104124

46667886

106126

181818181818

151515151515

[Caution on Product Characteristics] ① When the center distance is moved to reduce the backlash, the V max is the maximum amount of distance that you may shift without causing problems with the gear mesh. The V max is not a recommended value to use for adjustment when assembling.

② These worms produce axial thrust forces. See Page 362 for more details.

[Caution on Product Characteristics] ① The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 358 for more details.

② Duplex worms and worm wheels must be mated in a predetermined orientation, which is indicated by the arrows. Therefore, the arrow on the wheel does not indicate the mounting direction, but the rotating direction. Please refer to the Application Hints on Page 365.

Specifications

Precision grade KHK W 002 grade 1Referencesection of gear Rotating plane


Normalpressure angle 17° 30'

Material CAC702 （formerly JIS AℓBC2)

Heat treatment ―

Tooth hardness ―

Position ofreference tooth Max. allowable shift Weight

(kg)Catalog No.

S Vmax22 8 0.21 KWGDL2-R1

Outside dia. Neck dia. Shaft dia. Position ofreference tooth Max. allowable shift Weight

(kg)Catalog No.

Q R S T Vmax28 21 26.2 17 6 0.74 KWGDLS1.5-R135 24 30.2 22 8 1.17 KWGDLS2-R1

Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash

(mm)

Weight

(kg)Catalog No.

G （H）（ I ） J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm

242424242424

――――――

――――――

27.53539.542.55057.5

9.8420.829.335.653.875.3

8.1817.524.630.045.463.8

6.4013.919.824.236.951.9

5.3011.716.820.631.644.7

4.6810.414.918.328.340.4

4.259.40

13.516.625.836.7

3.688.28

11.914.622.632.4

0±0.0450±0.0450±0.0450±0.0450±0.0450±0.045

0.10 0.22 0.320.37 0.59 0.83


333333333333

――――――

――――――

35.545.551.555.565.575.5

21.044.362.375.8

115160

17.537.352.664.096.8

136

13.629.642.051.478.4

110

11.224.835.543.666.994.6

9.8421.931.338.559.584.9

8.9419.828.434.954.277.2

7.7517.425.030.747.668.1

0±0.0450±0.0450±0.0450±0.0450±0.0450±0.045

0.260.510.730.861.301.88



② Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 2 to 3 mm).



GE F

J

A B DC D’

H1

R

M

P Q

L N O

S

Vmax

G GG

G

G

G

W4

JML N OK

T

S R P Q S

Vmax

G G G G

W6

Specifications




Material SCM440


Tooth hardness 50 ～ 60HRC


Duplex WormsKWGDL・KWGDLS

Duplex Worms

KWGDL・KWGDLS

Duplex Worm Wheels

AGDL

Duplex Worm WheelsAGDL

Sp

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ical

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Module 2.5、3

Module 2.5、3


moduleNumber of

startsNominal



LH7 M N O P Q RKWGDL2.5-R1 m2.5 1 3°52' R W4 18 30 37 42 48 17 65KWGDL3-R1 m3 1 3°54' R W4 20 35 44 50 54 20 74


moduleNumber of

startsNominal





ratioNominal axial

moduleNo. of teeth


AH7 B C D D' E F


203036405060

m2.5

203036405060

3°52'3°52'3°52'3°52'3°52'3°52'

RRRRRR

H1H1H1HBHBHB

151515151515

404045456080

507590

100125150

558095

105130155

57.582.597.5

107.5132.5157.5

222222222222

151515151515


203036405060

m3

203036405060

3°54'3°54'3°54'3°54'3°54'3°54'

RRRRRR

H1H1H1HBHBHB

202020202020

505560607080

6090

108120150180

6696

114126156186

6999

117129159189

282828282828

171717171717





Specifications





Heat treatment ―

Tooth hardness ―


(kg)Catalog No.

S Vmax29 10 0.37 KWGDL2.5-R132 10 0.61 KWGDL3-R1


(kg)Catalog No.


A B C D D’

( I )

J

GE F

(H)

CS

CS

HB＊ CS has a sand mold casting finish.

[Caution on Secondary Operations]



(mm)

Weight

(kg)Catalog No.


373737373737

―――

(10)(12)(12)

―――(86)

(108)(133)

43.55663.568.58193.5

38.180.5

113138208291

31.467.194.5

115174245

24.553.175.592.4

141198

20.144.563.878.3

120170

17.639.156.068.8

106152

16.035.551.062.797.3

139

13.830.944.354.484.3

121

0±0.0450±0.0450±0.0450±0.0450±0.0450±0.045

0.450.881.251.141.932.90


454545454545

―――

(14)(14)(14)

―――

(106)(134)(164)

5267768297

112

65.0137193235355497

53.3114160195295415

41.590.0

128157239336

33.874.7

107131202285

29.565.593.8

115178254

26.959.585.6

105163233

22.851.273.490.1

140200

0±0.0450±0.0450±0.0450±0.0450±0.0450±0.045

0.811.652.322.193.264.48



① Please read “Caution on Performing Secondary Operations” (Page 362) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.


R

M

P Q

L N O

S

Vmax

G GG

G

G

G

W4

JML N OK

T

S R P Q S

Vmax

G G G G

W6

Specifications




Material SCM440





Duplex Worms

KWGDL・KWGDLS

Duplex Worm Wheels

AGDL


GE F

J

A B DC D’

H1

Sp

urG

ears

Hel

ical

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tern

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Rac

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inio

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Bev

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rod

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Sp

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ears

Hel

ical

Gea

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Rac

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P R

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& P

inio

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Gea

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Gea

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Module 3.5、4

Module 3.5、4


moduleNumber of

startsNominal



LH7 M N O P Q RKWGDL3.5-R1 m3.5 1 3°47' R W4 24 44 53 60 62 23 85KWGDL4-R1 m4 1 3°41' R W4 28 50 62 70 74 26 100


moduleNumber of

startsNominal





ratioNominal axial

moduleNo. of teeth


AH7 B C D D' E F


203036405060

m3.5

203036405060

3°47'3°47'3°47'3°47'3°47'3°47'

RRRRRR

H1H1H1HBHBHB

202020202020

556070708090

70105126140175210

77112133147182217

80.5115.5136.5150.5185.5220.5

323232323232

181818181818


203036405060

m4

203036405060

3°41'3°41'3°41'3°41'3°41'3°41'

RRRRRR

H1HBHBHBHBH5

202020202030

6065757590

120

80120144160200240

88128152168208248

92132156172212252

353535353535

202020202020





＊ H5 shape have a hub made from S45C cast iron.

Specifications




Material CAC702 （formerly JIS AℓBC2) ＊

Heat treatment ―

Tooth hardness ―


(kg)Catalog No.

S Vmax

37 12 1.05 KWGDL3.5-R144 14 1.67 KWGDL4-R1


(kg)Catalog No.


[Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 362) when performing modifi-cations and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.


＊ CS has a sand mold casting finish.

A B C D D’

( I )

J

GE F

(H)

CS

CS

HB

( I )

J

A B C D D’

GE F

(H)

H5



(mm)

Weight

(kg)Catalog No.


505050505050

―――

(15)(16)(16)

―――

(124)(155)(189)

61.57989.596.5

114131.5

98.5208293356538753

80.4172242295446627

62.5136193236360506

50.4111160196301425

44.298.1

141173267381

40.088.3

127156243345

33.775.7

109133207296

0±0.0450±0.0450±0.0450±0.0450±0.0450±0.045

1.242.513.613.345.026.87


555555555555

―(17)(17)(17)(17)(17)

―(99)

(121)(137)(177)(200)

7191

103111131151

134284400486735

1030

109234329400605851

84.8184262320488687

67.9150215264405572

59.7132190233361515

53.4118170208324461

44.8101144177275393

0±0.0450±0.0450±0.0450±0.0450±0.0450±0.045

1.763.014.184.787.07

11.5



R

M

P Q

L N O

S

Vmax

G GG

G

G

G

W4

JML N OK

T

S R P Q S

Vmax

G G G G

W6

Specifications




Material SCM440





Duplex Worms

KWGDL・KWGDLS

Duplex Worm Wheels

AGDL


GE F

J

A B DC D’

H1

Sp

urG

ears

Hel

ical

Gea

rsIn

tern

alG

ears

Rac

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P R

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& P

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Bev

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Sp

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Hel

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Ground Worm ShaftsModule 0.5、0.8KWG

Worm WheelsModule 0.5、0.8AG

JMK O

P QS S

G G GG

W5

Catalog No.Axial

moduleNumber of



J K L M N O P

KWG0.5-R1KWG0.5-R2 m0.5 1

23°11'6°20'

RR

W5W5

6565

1919

――

1212

――

3434

99

KWG0.8-R1KWG0.8-R2 m0.8 1

23°49'7°36'

RR

W5W5

8585

2525

――

2020

――

4040

1212

J

GE F

A B C D’

HA




ratioTransverse

moduleNo. of teeth

Number of starts

Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width

AH7 B C D D' E


2010301540

m0.5

2020303040

12121

3°11'6°20'3°11'6°20'3°11'

RRRRR

HAHAHAHAHA

44445

99

121215

1010151520

―――――

1111161621

55555

AG0.5-50R1AG0.5-60R1

5060

5060

11

3°11'3°11'

RR

HAHA

55

2025

2530

――

2631

55


2010301540

m0.8

2020303040

12121

3°49'7°36'3°49'7°36'3°49'

RRRRR

HAHAHAHAHA

55556

1212181820

1616242432

―――――

17.617.625.625.633.6

88888

AG0.8-50R1AG0.8-60R1

5060

5060

11

3°49'3°49'

RR

HAHA

88

2525

4048

――

41.649.6

88



Specifications





Heat treatment ―

Tooth hardness ―

Specifications




Material SCM440



Outside dia. Neck dia. Shaft dia. Weight

(kg)Catalog No.

Q R Sh7

1010

――

66

0.0180.018

KWG0.5-R1KWG0.5-R2

13.613.6

――

88

0.0430.043

KWG0.8-R1KWG0.8-R2

[Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 362) when performing modifica-tions and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.

② Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 2 to 3 mm). Use carbide tools for the modification of the shaft area near the bottom land.

Ground Worm Shafts

KWG

Worm Wheels

AG


Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash

(mm)

Weight

(kg)Catalog No.

F G （H）（ I ） J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm

77777

1212121212

―――――

―――――

9.59.5

121214.5

0.520.511.091.091.86

0.440.420.940.921.60

0.360.330.770.731.34

0.300.270.650.601.15

0.260.240.580.541.02

0.240.220.530.490.94

0.210.190.480.430.84

0.02~0.140.02~0.140.02~0.140.02~0.140.02~0.14

0.00560.00560.0120.0120.020


77

1212

――

――

1719.5

2.823.94

2.423.41

2.052.89

1.772.50

1.582.26

1.462.08

1.301.87

0.02~0.140.02~0.14

0.0350.053

AG0.5-50R1AG0.5-60R1

88888

1616161616

―――――

―――――

1414181822

1.781.763.773.756.45

1.501.443.213.145.49

1.211.112.622.464.55

1.000.912.202.023.87

0.880.801.961.803.46

0.820.741.811.653.19

0.710.631.611.452.83

0.06~0.170.06~0.170.06~0.170.06~0.170.06~0.17

0.0180.0180.0430.0430.068


88

1616

――

――

2630

9.7513.6

8.3111.7

6.949.77

5.948.39

5.347.63

4.967.05

4.386.27

0.06~0.170.06~0.17

0.100.14

AG0.8-50R1AG0.8-60R1


374 375

Sp

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Hel

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Sp

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Rac

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You can download CAD data (DXF format) of KHK Products from the Web Catalog.


JM NLK O

S R P Q S

GGGG

W6

Catalog No.Axial

moduleNumber of



J K L M N O P

KWG1-R1KWG1-R2 m1 1

23°35'7°08'

RR

W6W6

140140

3535

1010

3030

1010

5555

1616

KWG1.5-R1KWG1.5-R2 m1.5 1

23°26'6°51'

RR

W6W6

190190

5050

1515

4040

1515

7070

2525

GE F

J

A B D’DC

H1




ratioNo. of teeth

Number of starts

Helixangle

Handthread



2010301540

2020303040

12121

3°35'7°08'3°35'7°08'3°35'

RRRRR

H1H1H1H1H1

66668

1616202026

2020303040

2222323242

2323333343

10 10 20

AG1-50R1AG1-60R1

5060

5060

11

3°35'3°35'

RR

H1H1

810

3035

5060

5262

5363


2010301540

2020303040

12121

3°26'6°51'3°26'6°51'3°26'

RRRRR

H1H1H1H1H1

88

101012

2222303035

3030454560

3333484863

34.534.549.549.564.5

14 10 24

AG1.5-50R1AG1.5-60R1

5060

5060

11

3°26'3°26'

RR

H1H1

1212

4550

7590

7893

79.594.5





(mm)

Weight


―――――

―――――

1818232328

3.353.317.087.03

12.1

2.792.695.985.84

10.2

2.232.064.844.568.43

1.831.684.053.727.12

1.631.483.633.336.38

1.501.353.313.035.86

1.301.152.922.635.13

0.08~0.190.08~0.190.08~0.190.08~0.190.08~0.19

0.0380.0380.0780.0780.13

――

――

3338

18.325.6

15.521.8

12.918.1

10.915.4

9.8714.1

9.0912.9

7.9511.4

0.08~0.190.08~0.19

0.200.29

―――――

―――――

27.5 27.5 353542.5

9.849.72

20.820.735.6

8.187.87

17.517.130.0

6.405.92

13.913.124.2

5.304.87

11.710.820.6

4.684.25

10.49.56

18.3

4.253.839.408.58

16.6

3.683.278.287.46

14.6

0.10~0.210.10~0.210.10~0.210.10~0.210.10~0.21

0.100.100.220.220.37

――

――

5057.5

53.875.3

45.463.8

36.951.9

31.644.7

28.340.4

25.836.7

22.632.4

0.10~0.210.10~0.21

0.590.83


Specifications




Material SCM440




Specifications

Precision grade KHK W 002 grade 2 *Referencesection of gear Rotating plane


Material CAC702 (formerly JIS AlBC2)Heat treatment ―Tooth hardness ―


AH7 Bore

B Hub dia.

C Pitch dia.

D Throat dia.

D' Outside dia.

E Face width

F Hub width

G Length


（ I ） Web O.D.

J Mounting distance


(kg)Catalog No.

Q R S

1818

1313

18.218.2

0.250.25

KWG1-R1KWG1-R2

2828

2121

26.226.2

0.740.74

KWG1.5-R1KWG1.5-R2




Ground Worm Shafts

KWG

＊ The product shapes of J Series items are identified by background color.

6 8 10 12 14 15 16 17 18 19 20 22 25 28 30 ― 4 × 1.8 5 × 2.3 6 × 2.8 8 × 3.3

M4 M5 M4 M5 M6

Series

GE F

J

A B D’DC

L

H1KH1T

GE F

J

A B D’DC

L

Bore H7

Keyway Js9

Screw sizeCatalog No.AG1-20R1 J BORE H1T AG1-20R2 J BORE H1T AG1-30R1 J BORE H1T H1TAG1-30R2 J BORE H1T H1TAG1-40R1 J BORE H1T H1K H1K AG1-50R1 J BORE H1T H1K H1K H1K H1K H1K H1K AG1-60R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K AG1.5-20R1 J BORE H1T H1K AG1.5-20R2 J BORE H1T H1K AG1.5-30R1 J BORE H1K H1K H1K H1K H1K H1K AG1.5-30R2 J BORE H1K H1K H1K H1K H1K H1K AG1.5-40R1 J BORE H1K H1K H1K H1K H1K H1K H1K AG1.5-50R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K AG1.5-60R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K

[Caution on J series] ① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.③ Keyways are made according to JIS B1301 standards, Js9 tolerance.④ Certain products which would otherwise have a very long tapped hole are counterbored to reduce the length of the tap.⑤ For products having a tapped hole, a set screw is included.

To order J Series products, please specify; Catalog No. + J + BORE

L = 5mm L = 5mm


Worm Wheels

AG

376 377

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Worm WheelsModule 2、2.5AGF

JM NLK O

S R P Q S

GGGG

W6

Catalog No.Axial

moduleNumber of



J K L M N O P

KWG2-R1KWG2-R2 m2 1

25°12'

10°18'RR

W6W6

200200

3535

2525

4040

2525

7575

2222

KWG2.5-R1KWG2.5-R2 m2.5 1

24°46'9°28'

RR

W6W6

250250

5050

2727

4646

2727

100100

3030


ratioTransverse

moduleNo. of teeth

Number of starts

Profile shiftcoefficient

Helix angle

Hand thread

ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width(R)

AH7 B C D D' E FAGF2-20R1AGF2-20R2AGF2-25R1AGF2-30R1AGF2-30R2

2010253015 m2

2020253030

12112

−0.5−0.5−0.5−0.5−0.5

5°12'10°18'

5°12'5°12'

10°18'

RRRRR

H6H6H6H6H6

1212121212

3232353838

4040506060

4242526262

4444546464

1818181818

1212121212

AGF2-36R1AGF2-40R1AGF2-48R1AGF2-50R1AGF2-60R1

3640485060

3640485060

11111

0−0.5+0.5−0.5−0.5

5°12'5°12'5°12'5°12'5°12'

RRRRR

H6H8H9H9H9

1212121212

4045505050

728096

100120

7682

102102122

7884

104104124

1818181818

1212121212

AGF2.5-20R1AGF2.5-20R2AGF2.5-25R1AGF2.5-30R1AGF2.5-30R2

2010253015 m2.5

2020253030

12112

00000

4°46'9°28'4°46'4°46'9°28'

RRRRR

H6H6H6H6H6

1212121212

3535404040

505062.57575

555567.58080

57.557.57082.582.5

2020202020

1515151515


3640485060

3640485060

11111

00000

4°46'4°46'4°46'4°46'4°46'

RRRRR

H8H8H9H9H9

1212121212

4545505560

90100120125150

95105125130155

97.5107.5127.5132.5157.5

2020202020

1515151515

GEF’ F

A B C D D’

J

H6

① These worms produce axial thrust forces. See Page 362 for more details.[Caution on Product Characteristics]


② There may be space in the casting between the two materials, but it will not affect the joint strength.

＊ H8, H9 shape have a hub made from FC200 cast iron.FC200’s tensile strength (200N/mm2) is derived from test specimens and does not represent that of the boss.

Specifications




Material CAC702 （formerly JIS AℓBC2) ＊

Heat treatment ―

Tooth hardness ―

Specifications




Material SCM440





(kg)Catalog No.

Q R S

2626

1717

25.225.2

0.640.64

KWG2-R1KWG2-R2

3535

2323

30.230.2

1.271.27

KWG2.5-R1KWG2.5-R2





Ground Worm Shafts

KWG

[Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 362) when performing modifications and/or second-ary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.

② The tooth and the hub areas, fastened by casting, are designed to have higher hardness than other parts of the gear. However, please avoid areas other than the hub. Also, the strength may decrease if secondary operations are performed.


(mm)

Weight

(kg)Catalog No.

F' G （H）（ I ） J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm

55555

3535353535

―――――

―――――

3030354040

19.419.929.441.142.3

16.116.124.534.535.0

12.812.219.627.727.0

10.59.99

16.323.222.1

9.308.75

14.420.719.9

8.497.92

13.218.817.7

7.316.74

11.416.415.4

0.11~0.240.11~0.240.11~0.240.11~0.240.11~0.24

0.250.250.370.510.51


55555

3535353535

――

(10)(12)(12)

――

(76)(81)(96)

4750606070

57.870.398.5

106149

48.659.283.089.5

126

39.348.168.073.4

103

33.240.757.962.588.4

29.636.451.956.280.3

27.033.247.551.573.3

23.628.941.344.964.2

0.11~0.240.11~0.240.11~0.240.11~0.240.11~0.24

0.730.851.141.141.51


55555

4040404040

―――――

―――――

404046.2552.552.5

35.134.653.074.173.6

29.027.943.962.060.6

22.620.934.849.146.2

18.617.128.941.237.8

16.314.825.336.733.2

14.813.423.032.829.9

12.811.320.028.725.8

0.14~0.270.14~0.270.14~0.270.14~0.270.14~0.27

0.440.440.660.870.87


55555

4040404040

――

(13)(13)(13)

――

(97)(100)(125)

60657577.590

104127178192268

87.4106149161226

69.885.4

121130183

59.072.4

103111157

51.863.790.898.4

141

47.157.983.190.0

128

41.250.572.278.3

112

0.14~0.270.14~0.270.14~0.270.14~0.270.14~0.27

1.191.421.721.922.59



Worm Wheels

J

GE FF’

A B C D D’

H8

( I )

J

A B DC D’

GEF’ F

(H)

CS

CS

H9

AGF

378 379

Sp

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ears

Hel

ical

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Rac

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& P

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Sp

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Gea

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Bev

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Ground Worm ShaftsModule 3、4KWG

Worm WheelsModule 3、4AGF

JM NLK O

S R P Q S

GGGG

W6

Catalog No.Axial

moduleNumber of



J K L M N O P

KWG3-R1KWG3-R2 m3 1

24°31'8°58'

RR

W6W6

300300

5555

3030

6060

3030

125125

3838

KWG4-R1KWG4-R2 m4 1

25°43'

11°19'RR

W6W6

360360

7070

32.532.5

7575

32.532.5

150150

4040


ratioTransverse

moduleNo. of teeth

Number of starts


Helix angle

Hand thread



2010253015 m3

2020253030

12112

+0.333+0.333

0+0.333+0.333

4°31'8°58'4°31'4°31'8°58'

RRRRR

H6H6H6H8H8

2020202020

5050555555

6060759090

6868819898

717184

101101

2525252525

17.517.517.517.517.5


3640485060

3640485060

11111

+0.333+0.333+0.333+0.333+0.333

4°31'4°31'4°31'4°31'4°31'

RRRRR

H8H8H9H9H9

2020202020

6065707580

108120144150180

116128152158188

119131155161191

2525252525

17.517.517.517.517.5


2010253015 m4

2020253030

12112

00000

5°43'11°19'

5°43'5°43'

11°19'

RRRRR

H6H6H6H8H8

2020202020

6060656565

8080

100120120

8888

108128128

9292

112132132

3030303030

2020202020


3640485060

3640485060

11111

00000

5°43'5°43'5°43'5°43'5°43'

RRRRR

H9H9H9H9H0

20202020

160

70809090―

144160192200240

152168200208248

156172204212252

3030303030

20202020

7

GEF’ F

A B C D D’

J

H6

[Caution on Product Characteristics] ① These worms produce axial thrust forces. See Page 362 for more details.



＊ H8, H9 shape have a hub made from FC200 cast iron.FC200’s tensile strength (200N/mm2) is derived from test specimens and does not represent that of the boss.

Specifications




Material CAC702 （formerly JIS AℓBC2) ＊Heat treatment ―

Tooth hardness ―

Specifications




Material SCM440





(kg)Catalog No.

Q R S

4444

3030

40.240.2

2.662.66

KWG3-R1KWG3-R2

4848

2929

45.245.2

3.853.85

KWG4-R1KWG4-R2


Ground Worm Shafts

KWG




(mm)

Weight

(kg)Catalog No.


7.57.57.57.57.5

5050505050

―――――

―――――

505056.56565

59.760.290.2

126128

49.148.274.3

105105

38.336.158.883.179.8

31.529.548.969.665.2

27.525.442.661.057.2

25.123.039.055.451.6

21.519.433.548.244.3

0.16~0.290.16~0.290.16~0.290.16~0.290.16~0.29

0.880.881.241.631.63


7.57.57.57.57.5

5050505050

――(15)(15)(15)

――

(120)(125)(155)

74809295

110

178216303326457

148180252272383

118145204220310

99.7122174188265

87.5108153166237

79.498.0

141152217

69.184.9

121132188

0.16~0.290.16~0.290.16~0.290.16~0.290.16~0.29

2.252.763.283.624.76


1010101010

6060606060

―――――

―――――

6060708080

123127186260270

101101153216220

78.876.0

121171168

64.661.9

100143137

56.353.287.3

125120

51.548.379.9

114108

43.840.568.598.492.2

0.19~0.320.19~0.320.19~0.320.19~0.320.19~0.32

1.771.772.563.283.28


1010101015

6060606030

(20)(20)(20)(20)

8

(113)(128)(160)(168)204

92100116120140

366445624673941

304370519560788

243297420454638

204251356385544

179220314340486

164201288312444

141173248269385

0.19~0.320.19~0.320.19~0.320.19~0.320.19~0.32

4.105.256.957.353.60






Worm WheelsHEF’

JI A C D D’

F

H0

J

GE FF’

A B C D D’

H8

( I )

J

A B DC D’

GEF’ F

(H)

CS

CS

H9

AGF

380 381

Sp

urG

ears

Hel

ical

Gea

rsIn

tern

alG

ears

Rac

ksC

P R

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& P

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nsM

iter

Gea

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Gea

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crew

Gea

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orm

Gea

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airs

Bev

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earb

oxes

Oth

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rod

ucts

Sp

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ears

Hel

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Gea

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alG

ears

Rac

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& P

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Gea

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Gea

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Gea

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Bev

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ucts


Ground Worm ShaftsModule 5、6KWG

Specifications




Material SCM440




Worm WheelsModule 5、6AGF

JM NLK O

S R P Q S

GGGG

W6

Catalog No. Axial module

Number of starts

Lead angle Hand thread ShapeTotal length Shaft length (L) Neck length (L) Face width Neck length (R) Shaft length (R) Pitch dia.

J K L M N O PKWG5-R1 m5 1 5°43' R W6 400 75 30 90 30 175 50KWG6-R1 m6 1 5°43' R W6 400 60 40 100 40 160 60


ratioTransverse

moduleNo. of teeth

Number of starts


Helix angle

Hand thread



2025303640 m5

2025303640

11111

00000

5°43'5°43'5°43'5°43'5°43'

RRRRR

H6H6H8H9H9

2222222222

75757590

110

100125150180200

110135160190210

115140165195215

3535353535

2323232323

AGF5-48R1AGF5-50R1AGF5-60R1

485060

485060

111

000

5°43'5°43'5°43'

RRR

H0H0H0

140150200

―――

240250300

250260310

255265315

353535

7.57.57.5

AGF6-20R1AGF6-25R1AGF6-30R1AGF6-36R1

20253036

m6

20253036

1111

0000

5°43'5°43'5°43'5°43'

RRRR

H6H6H8H9

25252525

8590

100110

120150180216

132162192228

138168198234

40404040

23232323


40485060

40485060

1111

0000

5°43'5°43'5°43'5°43'

RRRR

H0H0H0H0

130180190250

――――

240288300360

252300312372

258306318378

40404040

8888

GEF’ F

A B C D D’

J

H6＊ H8, H9 shape have a hub made from FC200 cast iron.FC200’s tensile strength (200N/mm2) is derived from test specimens and does not represent that of the boss.


② There may be space in the casting between the two materials, but it will not affect the joint strength.③ For H0-shaped products with a bore size of φ 190 or more, the bore tolerance is H8.


Specifications





Tooth hardness ―

HEF’

JI A C D D’

F

H0

J

GE FF’

A B C D D’

H8

( I )

J

A B DC D’

GEF’ F

(H)

CS

CS

H9


(kg)Catalog No.

Q R S60 36 50.2 5.75 KWG5-R172 44 60.2 8.09 KWG6-R1


① Please read “Caution on Performing Secondary Operations” (Page 362) when performing modifications and/or second-ary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.


[Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 362) when performing modi-fications and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.

② Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 2 to 3 mm). Use carbide tools for the modifica-tion of the shaft area near the bottom land.

Ground Worm Shafts

KWG

Worm Wheels


Hub width (L) Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash

(mm)

Weight

(kg)Catalog No.


1212121212

7070707070

―――

(25)(26)

―――

(140)(162)

7587.5

100115125

211319446627763

172261369519632

134206291414506

108168239343421

95.0147211302371

86.2134191274337

72.7114164234288

0.22~0.350.22~0.350.22~0.350.22~0.350.22~0.35

3.264.485.797.709.97


17.517.517.5

353535

101010

195205255

145150175

107011501610

886956

1340

715772

1090

598646913

530574820

483523744

411446639

0.22~0.350.22~0.350.22~0.35

5.045.286.48

AGF5-48R1AGF5-50R1AGF5-60R1

12121212

75757575

―――

(30)

―――

(172)

90105120138

329497696978

268405572806

208319451641

167259368528

146227325466

131204290417

110173248355

0.24~0.370.24~0.370.24~0.370.24~0.37

4.957.149.66

12.5


20202020

40404040

12121212

190240250310

150174180210

1190167018002520

981138014802090

784111012001680

648920994

1410

572816885

1260

513735796

1130

436628676969

0.24~0.370.24~0.370.24~0.370.24~0.37

6.207.588.00

10.0



AGF

382 383

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Sp

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Hel

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Ground WormsModule 1、1.5SWG


Catalog No.● : J Series (Available-on-request)

Axialmodule

Number of starts

Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width (R) Hub width (L)

LH7 M N O P Q Q'

SWG1-R1 SWG1-R2 m1 1

23°35'7°08'

RR

W2W2

88

――

1616

1818

(20)(20)

――

――

SWG1.5-R1

•SWG1.5-R1J10m1.5

1 3°26' R W1W1K

1010 20 25 28 30 10 ―

SWG1.5-R2•SWG1.5-R2J10 2 6°51' R W1

W1K1010 20 25 28 30 10 ―

R

S

N OL

G

P

W2

GE F

J

A B D’DC

H1

[Caution on Product Characteristics] ① For W2-shaped products, a set screw is included. When setting up the mating wheel, make sure no friction occurs within the set screw.② These worms produce axial thrust forces. See Page 362 for more details.



Specifications

Precision grade KHK W 001 grade 2 ＊Referencesection of gear Axial


Material S45C

Heat treatment Teeth induction hardened




Catalog No.Reduc-tion ratio

No. of teeth

Number of starts

Helixangle

Handthread



2010301540

2020303040

12121

3°35'7°08'3°35'7°08'3°35'

RRRRR

H1H1H1H1H1

66668

1616202026

2020303040

2222323242

2323333343

10 10 20

AG1-50R1AG1-60R1

5060

5060

11

3°35'3°35'

RR

H1H1

810

3035

5060

5262

5363


2010301540

2020303040

12121

3°26'6°51'3°26'6°51'3°26'

RRRRR

H1H1H1H1H1

88

101012

2222303035

3030454560

3333484863

34.534.549.549.564.5

14 10 24

AG1.5-50R1AG1.5-60R1

5060

5060

11

3°26'3°26'

RR

H1H1

1212

4550

7590

7893

79.594.5

JAllowable torque (N·m) NOTE 1 Backlash

(mm)

Weight


1818232328

3.353.317.087.03

12.1

2.792.695.985.84

10.2

2.232.064.844.568.43

1.831.684.053.727.12

1.631.483.633.336.38

1.501.353.313.035.86

1.301.152.922.635.13

0.08~0.190.08~0.190.08~0.190.08~0.190.08~0.19

0.0380.0380.0780.0780.13

3338

18.325.6

15.521.8

12.918.1

10.915.4

9.8714.1

9.0912.9

7.9511.4

0.08~0.190.08~0.19

0.200.29

27.5 27.5 353542.5

9.849.72

20.820.735.6

8.187.87

17.517.130.0

6.405.92

13.913.124.2

5.304.87

11.710.820.6

4.684.25

10.49.56

18.3

4.253.839.408.58

16.6

3.683.278.287.46

14.6

0.10~0.210.10~0.210.10~0.210.10~0.210.10~0.21

0.100.100.220.220.37

5057.5

53.875.3

45.463.8

36.951.9

31.644.7

28.340.4

25.836.7

22.632.4

0.10~0.210.10~0.21

0.590.83

AH7 Bore

B Hub dia.

C Pitch dia.

D Throat dia.

D' Outside dia.

E Face width

F Hub width

G Length


（ I ） Web O.D.

J Mounting distance

Specifications

Precision grade KHK W 002 grade 2 *Referencesection of gear Rotating plane


Material CAC702 (formerly JIS AℓBC2)Heat treatment ―Tooth hardness ―






① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.③ Keyways are made according to JIS B1301 standards, Js9 tolerance.④ Certain products which would otherwise have a very long tapped hole are counterbored to reduce the length of the tap.⑤ For products having a tapped hole, a set screw is included.⑥ The use of H1T shaped Set Screws for fastening gears to a shaft is a method only applicable to the usage for light loads.

For secure fastening, please use dowel pins in combination.

Total length Keyway Set Screw Weight

(kg)Catalog No.

● : J Series (Available-on-request)R Width×Depth Size S

3232

――

M4M4

55

0.0370.037

SWG1-R1 SWG1-R2

40 ―4 x 1.8

―M4

―5

0.120.11

SWG1.5-R1•SWG1.5-R1J10

40 ―4 x 1.8

―M4

―5

0.120.11

SWG1.5-R2•SWG1.5-R2J10

Ground Worms

SWG

RP Q

L M N O

G

W1

S

RP Q

L M N O

G

W1K

Worm Wheels

AG

NOTE 1 : Allowable torque for worm revolution (rpm)

Series

[Caution on J series] ① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.

② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.

③ Keyways are made according to JIS B1301 standards, Js9 tolerance.④ Areas of products which have been re-worked will not be black oxide coated.⑤ For products having a tapped hole, a set screw is included.

6 8 10 12 14 15 16 17 18 19 20 22 25 28 30 ― 4 × 1.8 5 × 2.3 6 × 2.8 8 × 3.3

M4 M5 M4 M5 M6

Series

Bore H7

Keyway Js9

Screw sizeCatalog No.

[Caution on J series]

GE F

J

A B D’DC

L

H1KH1T

GE F

J

A B D’DC

L

AG1-20R1 J BORE H1T

AG1-20R2 J BORE H1T

AG1-30R1 J BORE H1T H1T

AG1-30R2 J BORE H1T H1T

AG1-40R1 J BORE H1T H1K H1K

AG1-50R1 J BORE H1T H1K H1K H1K H1K H1K H1K

AG1-60R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K

AG1.5-20R1 J BORE H1T H1K

AG1.5-20R2 J BORE H1T H1K

AG1.5-30R1 J BORE H1K H1K H1K H1K H1K H1K

AG1.5-30R2 J BORE H1K H1K H1K H1K H1K H1K

AG1.5-40R1 J BORE H1K H1K H1K H1K H1K H1K H1K

AG1.5-50R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K

AG1.5-60R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K

To order J Series products, please specify; Catalog No. + J + BORE＊ The product shapes of J Series items are identified by background color.

L = 5mm L = 5mm

Sp

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Sp

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Hel

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Rac

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Gea

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Gea

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Ground WormsModule 2、2.5SWG


R

P QQ’

L M N O

G

W3


Axialmodule

Number of starts


LH7 M N O P Q Q'SWG2-R1

•SWG2-R1J12

•SWG2-R1J14m2

1 3°41' RW3W3KW3K

121214

25 31 35 32 15 3

SWG2-R2

•SWG2-R2J12

•SWG2-R2J142 7°21' R

W3W3KW3K

121214

25 31 35 32 15 3

SWG2.5-R1

•SWG2.5-R1J15

•SWG2.5-R1J16

•SWG2.5-R1J17m2.5

1 3°52' R

W3W3KW3KW3K

15151617

30 37 42 45 17 3

SWG2.5-R2

•SWG2.5-R2J15

•SWG2.5-R2J16

•SWG2.5-R2J17

2 7°42' R

W3W3KW3KW3K

15151617

30 37 42 45 17 3

J

G

B C D D’

E F

A

H4

GE F

J

A B D’DC

H1


[Caution on Product Characteristics] ① The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 358 for more details.② There may be space in the casting between the two materials, but it will not affect the joint strength.


① Please read “Caution on Performing Secondary Operations” (Page 362) when performing modifications and/or secondary operations for safety con-cerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.



Specifications



Material S45C





AH7 Bore

B Hub dia.

C Pitch dia.

D Throat dia.

D' Outside dia.

E Face width

F Hub width

G Length


（ I ） Web O.D.

J Mounting distance

Specifications

Precision grade KHK W 002 grade 2 ＊Referencesection of gear Rotating plane


Material CAC702 (formerly JIS AℓBC2) ＊＊Heat treatment ―Tooth hardness ―

＊＊ H4, H5 shape have a hub made from FC200 cast iron. FC200’s tensile strength (200N/mm2) is derived from test specimens and does not represent that of the boss.


Catalog No. Reduc-tion ratio

No. of teeth

Number of starts

Helixangle

Handthread

Shape AH7 B C D D' E F G （H）（ I ） JAllowable torque (N·m) NOTE 1 Backlash

(mm)

Weight



2010301540

2020303040

12121

3°41'7°21'3°41'7°21'3°41'

R

H1H1H4H4H4

12

3333404045

4040606080

4444646484

4646666686

18 15 33― ―

35.5 35.5 45.5 45.5 55.5

21.020.744.344.075.8

17.516.837.336.564.0

13.612.629.627.851.4

11.210.324.822.843.6

9.848.9321.920.138.5

8.948.0519.818.034.9

7.756.8917.415.730.7

0.11~0.24

0.260.260.510.510.85

AG2-50R1AG2-60R1

5060

5060

11

3°41'3°41'

H5H5

5055

100120

104124

106126

(8)(11)

(83)(100)

65.5 75.5

115160

96.8136

78.4110

66.994.6

59.584.9

54.277.2

47.668.1

1.051.52


2010301540

2020303040

12121

3°52'7°42'3°52'7°42'3°52'

H1H1H4H4H5

1212121215

3535404045

50507575

100

55558080

105

57.557.582.582.5107.5

20 14 34

――――

(11)

――――

(81)

43.5 43.5 565668.5

34.634.273.272.7

125

28.527.461.059.6

105

22.320.648.345.584.0

18.316.840.537.271.2

16.014.535.532.662.5

14.613.132.229.457.0

12.511.128.125.349.5

0.14~0.27

0.390.390.790.791.11

AG2.5-50R1AG2.5-60R1

5060

5060

11

3°52'3°52'

H5H5

1515

5560

125150

130155

132.5157.5

(12)(12)

(106)(130)

8193.5

189265

158222

128180

109154

96.7138

88.5126

76.7110

1.702.32

12 14 15 16 17 18 19 20 22 25 28 30 32 35 4 × 1.8 5 × 2.3 6 × 2.8 8 × 3.3 10 × 3.3

M4 M5 M6 M8


(kg)Catalog No.


50―

4 x 1.85 x 2.3

―M4M4

―7.57.5

0.210.210.19

SWG2-R1

•SWG2-R1J12

•SWG2-R1J14

50―

4 x 1.85 x 2.3

―M4M4

―7.57.5

0.210.210.19

SWG2-R2

•SWG2-R2J12

•SWG2-R2J14

65

―5 x 2.35 x 2.35 x 2.3

―M4M4M4

―8.58.58.5

0.400.390.380.37

SWG2.5-R1

•SWG2.5-R1J15

•SWG2.5-R1J16

•SWG2.5-R1J17

65

―5 x 2.35 x 2.35 x 2.3

―M4M4M4

―8.58.58.5

0.400.390.380.37

SWG2.5-R2

•SWG2.5-R2J15

•SWG2.5-R2J16

•SWG2.5-R2J17

( I )

J

A B C D D’

GE F

(H)

CS

CS H5


① Please read “Caution on Performing Secondary Operations” (Page 362) when perform-ing modifications and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.

② Due to the gear teeth being induction hardened, no secondary operations can be per-formed on tooth areas including the bottom land (approx. 2 to 3 mm).

Ground Worms

SWG

Series

R

P QQ’

L M N O

GS

W3K

Worm Wheels

AG

[Caution on J series] ① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.③ Keyways are made according to JIS B1301 standards, Js9 tolerance.④ Areas of products which have been re-worked will not be black oxide coated.⑤ For products having a tapped hole, a set screw is included.

Series

Bore H7

Keyway Js9

Screw sizeCatalog No.AG2-20R1 J BORE H1K H1K H1K H1K H1KAG2-20R2 J BORE H1K H1K H1K H1K H1K AG2-30R1 J BORE H4K H4K H4K H4K H4K H4K H4K H4K H4K AG2-30R2 J BORE H4K H4K H4K H4K H4K H4K H4K H4K H4K AG2-40R1 J BORE H4K H4K H4K H4K H4K H4K H4K H4K H4K H4KAG2-50R1 J BORE H5K H5K H5K H5K H5K H5K H5K H5K H5K H5K H5K H5K AG2-60R1 J BORE H5K H5K H5K H5K H5K H5K H5K H5K H5K H5K H5K H5K H5K AG2.5-20R1 J BORE H1K H1K H1K H1K H1K H1K H1KAG2.5-20R2 J BORE H1K H1K H1K H1K H1K H1K H1K AG2.5-30R1 J BORE H4K H4K H4K H4K H4K H4K H4K H4K H4K AG2.5-30R2 J BORE H4K H4K H4K H4K H4K H4K H4K H4K H4K AG2.5-40R1 J BORE H5K H5K H5K H5K H5K H5K H5K H5K AG2.5-50R1 J BORE H5K H5K H5K H5K H5K H5K H5K H5K H5K H5K H5K AG2.5-60R1 J BORE H5K H5K H5K H5K H5K H5K H5K H5K H5K H5K H5K H5K

① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.③ Keyways are made according to JIS B1301 standards, Js9 tolerance.④ Certain products which would otherwise have a very long tapped hole are counterbored to reduce the length of the tap.⑤ For products having a tapped hole, a set screw is included.


GE F

J

A B D’DC

L

H1K

J

G

B C D D’

E F

A

L

H4K

( I )

J

A B C D D’

GE F

(H)

CS

CS

L

H5K


L = Half of hub length (F) L = Half of hub length (F)L = Half of hub length (F)

Sp

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ears

Hel

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crew

Gea

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Gea

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airs

Bev

elG

earb

oxes

Oth

erP

rod

ucts

Sp

urG

ears

Hel

ical

Gea

rsIn

tern

alG

ears

Rac

ksC

P R

acks

& P

inio

nsM

iter

Gea

rsB

evel

Gea

rsS

crew

Gea

rsW

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Gea

r P

airs

Bev

elG

earb

oxes

Oth

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rod

ucts

386 387

Ground WormsModule 3、4SWG

Specifications



Material S45C




Worm WheelsModule 3、4

R

P QQ’

L M N O

G

W3


Axialmodule

Number of starts


LH7 M N O P Q Q'SWG3-R1

•SWG3-R1J17

•SWG3-R1J18

•SWG3-R1J19

•SWG3-R1J20

m3

1 3°54' R

W3W3KW3KW3KW3K

1617181920

35 44 50 50 20 4

SWG3-R2

•SWG3-R2J17

•SWG3-R2J18

•SWG3-R2J19

•SWG3-R2J20

2 7°46' R

W3W3KW3KW3KW3K

1617181920

35 44 50 50 20 4

SWG3-R3

•SWG3-R3J17

•SWG3-R3J18

•SWG3-R3J19

•SWG3-R3J20

3 11°34' R

W3W3KW3KW3KW3K

1617181920

35 44 50 50 20 4

SWG4-R1SWG4-R2SWG4-R3

m4123

3°41'7°21'

10°57'

RRR

W3W3W3

222222

505050

626262

707070

707070

252525

555




AG


J

G

B C D D’

E F

A

H4

GE F

J

A B D’DC

H1

Specifications

Precision grade KHK W 002 grade 2 ＊Referencesection of gear Rotating plane


Material CAC702 (formerly JIS AℓBC2) ＊＊Heat treatment ―Tooth hardness ―

＊＊ H4, H5 shape have a hub made from FC200 cast iron. FC200’s tensile strength (200N/mm2) is derived from test specimens and does not represent that of the boss.



Catalog No. Reduction ratio

No. of teeth

Number of starts

Helixangle

Handthread

Shape AH7 B C D D' E F G （H）（ I ） JAllowable torque (N·m) NOTE 1 Backlash

(mm)

Weight



2010301510

2020303030

12123

3°54'7°46'3°54'7°46'

11°34'

R

H1H1H4H4H4

20

5050555555

6060909090

6666969696

6969999999 25 18 43

― ―

5252 6767 67

59.558.7

126125129

48.846.9

104.3102103

38.035.182.477.677.1

30.928.468.462.862.4

27.024.559.955.153.8

24.722.254.549.748.7

20.918.546.942.240.6 0.16~0.29

0.750.751.461.461.46

AG3-40R1AG3-45R3AG3-50R1AG3-60R1

40155060

40455060

1311

3°54'11°34'3°54'3°54'

H5

65707585

120135150180

126141156186

129144159189

(10)(11)(15)(15)

(103)(120)(130)(155)

8289.5 97112

215274325455

179224270380

143171219308

120138185261

106121163233

96.4109150213

82.592.6

128183

2.032.443.224.52


2010301510

2020303030

12123

3°41'7°21'3°41'7°21'

10°57'

H1H1H4H4H4

6060656565

8080

120120120

8888

128128128

9292

132132132 30 20 50

― ―

7171919191

115114244242250

93.690.0

200196198

72.767.2

158148147

58.253.5

129118117

51.146.4

114104102

45.741.2

10192.290.2

38.434.186.377.674.7 0.19~0.32

1.531.533.003.003.00

AG4-40R1AG4-45R3AG4-50R1AG4-60R1

40155060

40455060

1311

3°41'10°57'3°41'3°41'

H5

809090

100

160180200240

168188208248

172192212252

(15)(16)(16)(17)

(133)(153)(173)(210)

111121131151

417531630881

343430519730

274326418589

226259347491

200229309441

179202277395

152170236337

4.325.446.258.74

AH7 Bore

B Hub dia.

C Pitch dia.

D Throat dia.

D' Outside dia.

E Face width

F Hub width

G Length


（ I ） Web O.D.

J Mounting distance

[Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 362) when performing modifications and/or secondary oper-ations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.


Ground Worms

SWG

R

P QQ’

L M N O

GS

W3K

Series


(kg)Catalog No.


74

―5 x 2.36 x 2.86 x 2.86 x 2.8

―M4M5M5M5

―10101010

0.660.640.620.600.58

SWG3-R1

•SWG3-R1J17

•SWG3-R1J18

•SWG3-R1J19

•SWG3-R1J20

74

―5 x 2.36 x 2.86 x 2.86 x 2.8

―M4M5M5M5

―10101010

0.660.640.620.600.58

SWG3-R2

•SWG3-R2J17

•SWG3-R2J18

•SWG3-R2J19

•SWG3-R2J20

74

―5 x 2.36 x 2.86 x 2.86 x 2.8

―M4M5M5M5

―10101010

0.660.640.620.600.58

SWG3-R3

•SWG3-R3J17

•SWG3-R3J18

•SWG3-R3J19

•SWG3-R3J20

100100100

―――

―――

―――

1.821.821.82

SWG4-R1SWG4-R2SWG4-R3

Worm Wheels

( I )

J

A B C D D’

GE F

(H)

CS

CS H5

AG


① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.





Series

GE F

J

A B D’DC

L

H1K

J

G

B C D D’

E F

A

L

H4K

( I )

J

A B C D D’

GE F

(H)

CS

CS

L

H5K

Bore H7

Keyway Js9


20 22 25 28 30 32 35 40 45 50 6 × 2.8 8 × 3.3 10 × 3.3 12 × 3.3 14 × 3.8

M5 M6 M8 M10AG3-20R1 J BORE H1K H1K H1K H1K H1KAG3-20R2 J BORE H1K H1K H1K H1K H1K AG3-30R1 J BORE H4K H4K H4K H4K H4K H4K AG3-30R2 J BORE H4K H4K H4K H4K H4K H4K AG3-30R3 J BORE H4K H4K H4K H4K H4K H4K AG3-40R1 J BORE H5K H5K H5K H5K H5K H5K H5K AG3-45R3 J BORE H5K H5K H5K H5K H5K H5K H5K H5K AG3-50R1 J BORE H5K H5K H5K H5K H5K H5K H5K H5K H5K AG3-60R1 J BORE H5K H5K H5K H5K H5K H5K H5K H5K H5K H5K




L = 9mm L = 9mmL = 9mm

388

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Ground WormsModule 5、6SWG

Worm WheelsModule 5、6

R

P QQ’

L M N O

G

W3


ratioTransverse

moduleNo. of teeth

Number of starts


AH7 B C D D' E


2010301540

m5

2020303040

12121

4°05'8°08'4°05'8°08'4°05'

RRRRR

H4H4H5H5H5

2222222222

75757575

110

100100150150200

110110160160210

115115165165215

3535353535

AG5-50R1AG5-60R1

5060

5060

11

4°05'4°05'

RR

H5H5

2222

120130

250300

260310

265315

3535


2010301540

m6

2020303040

12121

4°17'8°32'4°17'8°32'4°17'

RRRRR

H4H4H5H5H5

2525252525

8585

100100120

120120180180240

132132192192252

138138198198258

4040404040

AG6-50R1AG6-60R1

5060

5060

11

4°17'4°17'

RR

H5H5

2525

130150

300360

312372

318378

4040

Catalog No. Axialmodule

Number of starts


LH7 M N O P Q Q'

SWG5-R1SWG5-R2 m5 1

24°05'8°08'

RR

W3W3

2525

5656

7070

8080

8585

3030

55

SWG6-R1SWG6-R2 m6 1

24°17'8°32'

RR

W3W3

3030

6363

8080

9292

100100

3535

55




＊ H4, H5 shape have a hub made from FC200 cast iron. FC200’s tensile strength (200N/mm2) is derived from test specimens and does not represent that of the boss.

AG

JG

B C D D’

E F

A

H4

Specifications





Tooth hardness ―

Specifications

Precision grade KHK W 001 grade 2 Referencesection of gear Axial


Material S45C




389

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Total length Set Screw Weight

(kg)Catalog No.

R Size S

120120

――

――

2.782.78

SWG5-R1SWG5-R2

140140

――

――

4.154.15

SWG6-R1SWG6-R2

( I )

J

A B C D D’

GE F

(H)

H5





Ground Worms

SWG

Worm Wheels

AG


(mm)

Weight

(kg)Catalog No.

F G （H）（ I ） J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm

NOTE 1. Allowable torques based on worm speed (rpm)

2525252525

6060606060

――

(21)(21)(23)

――

(120)(120)(168)

8585

110110135

202200427425731

163157348340597

127117275259478

10193.2

224206394

88.480.2

196180346

79.071.1

175159309

65.558.1

147132259

0.22~0.350.22~0.350.22~0.350.22~0.350.22~0.35

2.792.794.754.758.84


2525

6060

(23)(24)

(215)(260)

160185

11101550

9031270

7291030

605855

534763

479682

402575

0.22~0.350.22~0.35

12.717.6

AG5-50R1AG5-60R1

3030303030

7070707070

――

(26)(26)(30)

――

(142)(142)(200)

100100130130160

315314666668

1140

252244538532923

196182424403738

157145346321609

135124300278528

121110267246472

99.689.3

224203394

0.24~0.370.24~0.370.24~0.370.24~0.370.24~0.37

4.534.538.528.52

14.2


3030

7070

(30)(30)

(258)(312)

190220

17202410

14001960

11301580

9351320

8161170

7331040

611875

0.24~0.370.24~0.37

21.029.7

AG6-50R1AG6-60R1

390 391

Sp

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Bev

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ucts

Sp

urG

ears

Hel

ical

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alG

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Rac

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Gea

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Steel WormsModule 0.5、0.8SW

Specifications


Referencesection of gear Normal plane



Material S45C

Heat treatment ―

Tooth hardness (less than 194HB)

Surface treatment Black oxide coating

R

S

N OL

P

W2

Bronze Worm WheelsModule 0.5、0.8BG

Specifications





Material CAC502 (formerly JIS PBC2）

Heat treatment ―

Tooth hardness ―

J

GE F

A B C D’

L

HAT


ratioNormalmodule

No. of teeth

Number of starts


AH7 B C D D' EBG0.8-20R1BG0.8-20R2BG0.8-30R1BG0.8-30R2BG0.8-40R1

2010301540

m0.8

2020303040

12121

3°17'6°34'3°17'6°34'3°17'

RRRRR

HAHAHAHAHA

55556

1212181820

16.0316.1124.0424.1632.05

―――――

17.617.625.625.633.6

99999

BG0.8-50R1BG0.8-60R1

5060

5060

11

3°17'3°17'

RR

HAHA

88

2525

40.0648.08

――

41.649.6

99

Catalog No. Normal module

Numberof starts


LH8 M N O P Q Q'SW0.5-R1SW0.5-R2 m0.5 1

22°36'5°13'

RR

W2W2

55

――

1111

1212

(10)(10)

――

――

SW0.8-R1SW0.8-R2 m0.8 1

23°17'6°34'

RR

W2W2

66

――

1414

15.615.6

(18)(18)

――

――

J

GE F

A B C D’

HA


ratioNormalmodule

No. of teeth

Number of starts


AH7 B C D D' EBG0.5-20R1BG0.5-20R2BG0.5-30R1BG0.5-30R2BG0.5-40R1

2010301540

m0.5

2020303040

12121

2°36'5°13'2°36'5°13'2°36'

RRRRR

HATHATHATHATHAT

44445

99

121215

10.0110.0415.0215.0620.02

―――――

1111161621

55555

BG0.5-50R1BG0.5-60R1

5060

5060

11

2°36'2°36'

RR

HATHAT

55

2025

25.0330.03

――

2631

55



① For W2-shaped products, a set screw is included. When setting up the mating wheel, make sure no friction occurs within the set screw.


① Worm Wheels are profile shifted to create the proper center distance.② For products with a tapped hole, a set screw is included.③ The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please

see Page 358 for more details.④ If bore size is less than φ 4, the diameter tolerance is H8. If bore size is φ 5 or φ 6, and the hole length exceeds 3 times

the diameter, the tolerance is also H8.


② Gear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat treating as it will create bad tooth contact causing abrasion of the wheel.


Hub width Total length Mounting distance Set Screw Allowable torque (N·m) NOTE 1 Backlash

(mm)

Weight

(kg)Catalog No.

F G J Size L 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm


Steel Worms

SW

Bronze Worm Wheels

77777

1212121212

10.510.5131315.5

M3M3M3M3M4

3.53.53.53.53.5

0.27 0.28 0.58 0.59 0.99

0.23 0.23 0.50 0.49 0.85

0.19 0.18 0.41 0.39 0.71

0.15 0.15 0.34 0.32 0.60

0.14 0.13 0.30 0.29 0.54

0.13 0.12 0.28 0.26 0.50

0~0.160~0.160~0.160~0.160~0.16

0.0061 0.0061 0.014 0.014 0.023

BG0.5-20R1BG0.5-20R2BG0.5-30R1BG0.5-30R2BG0.5-40R1

77

1212

1820.5

M4M4

3.53.5

1.50 2.10

1.28 1.80

1.08 1.52

0.92 1.31

0.83 1.19

0.77 1.09

0~0.160~0.16

0.039 0.059

BG0.5-50R1BG0.5-60R1

Hub width Total length Mounting distance Allowable torque (N·m) NOTE 1 Backlash

(mm)

Weight

(kg)Catalog No.

F G J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm


99999

1818181818

1515191923

1.05 1.06 2.23 2.24 3.81

0.880.861.891.873.24

0.71 0.66 1.53 1.46 2.67

0.58 0.54 1.29 1.20 2.26

0.52 0.48 1.15 1.07 2.02

0.48 0.44 1.06 0.98 1.87

0.04~0.220.04~0.220.04~0.220.04~0.220.04~0.22

0.0230.0230.0550.0550.087

BG0.8-20R1BG0.8-20R2BG0.8-30R1BG0.8-30R2BG0.8-40R1

99

1818

2731

5.76 8.06

4.906.88

4.07 5.73

3.47 4.90

3.13 4.46

2.90 4.12

0.04~0.220.04~0.22

0.130.18

BG0.8-50R1BG0.8-60R1


(kg)Catalog No.

R Size S1818

M3M3

33

0.010 0.010

SW0.5-R1SW0.5-R2

3030

M4M4

55

0.0290.029

SW0.8-R1SW0.8-R2

BG

392 393

Sp

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Sp

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Hel

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Gea

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Rac

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P R

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& P

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Gea

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Bev

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GE F

J

A B D’DC

L

① Worm Wheels are profile shifted to create the proper center distance.② The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 358 for more details.③ If bore size is less than φ 4, the diameter tolerance is H8. If bore size is φ 5 or φ 6, and the hole length exceeds 3 times the diameter, the tolerance is also H8.

Steel WormsModule 1、1.25SW

R

S

N OL

P

W2

Bronze Worm Wheels & Gray Iron Worm WheelsModule 1、1.25BG・CG


(kg)Catalog No.

R Size S3232

M4M4

55

0.0430.043

SW1-R1SW1-R2

3737

M5M5

55

0.0850.085

SW1.25-R1SW1.25-R2


Number of starts


LH7(H8) M N O P Q Q'SW1-R1SW1-R2 m1 1

23°35'7°11'

RR

W2W2

6 H8

6 H8――

1616

1818

(20)(20)

――

――

SW1.25-R1SW1.25-R2 m1.25 1

23°25'6°50'

RR

W2W2

88

――

2121

23.523.5

(25)(25)

――

――






Steel Worms

SW

Bronze Worm Wheels & Gray Iron Worm Wheels

GE F

J

A B D’DC

H1

Specifications





Material S45C

Heat treatment ―



BG・CG

Specifications

Catalog No. BG CGPrecision grade KHK W 002 grade 4 ＊Referencesection of gear Normal plane



Material CAC502(formerly JIS PBC2) FC200 ＊＊

Heat treatment ―Tooth hardness ―

＊ The precision grade of J Series products is equiva-lent to the value shown in the table.

＊＊ FC200’s tensile strength (200N/mm2) is derived from test specimens and differs according to the product shape.



(mm)

Weight

(kg)30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm

Series

Bore H7

Keyway Js9


H1T

GE F

J

A B D’DC

L

H1K

BG1-20R1BG1-20R2BG1-30R1BG1-30R2BG1-40R1BG1-50R1

201030154050

202030304050

121211

3°35'7°11'3°35'7°11'3°35'3°35'

R H1

666688

161620202630

20.0520.1630.0730.2440.0850.1

222232324252

232333334353

10 10 20

181823232833

1.89 1.90 4.00 4.03 6.85

10.3

1.58 1.54 3.38 3.35 5.79 8.76

1.26 1.18 2.74 2.62 4.76 7.27

1.04 0.97 2.29 2.14 4.03 6.18

0.92 0.85 2.05 1.91 3.61 5.58

0.85 0.78 1.87 1.74 3.31 5.14

0.06~0.24

0.0430.0430.0890.0890.150.23

BG1.25-20R1BG1.25-20R2BG1.25-30R1BG1.25-30R2BG1.25-40R1BG1.25-50R1

201030154050

202030304050

121211

3°25'6°50'3°25'6°50'3°25'3°25'

666688

202025253040

25.0425.1837.5737.7750.0962.61

27.527.5404052.565

28.7528.7541.2541.2553.7566.25

11 9 20

232329.2529.2535.541.75

3.19 3.19 6.75 6.77

11.5 17.4

2.65 2.58 5.67 5.60 9.71

14.7

2.10 1.96 4.56 4.33 7.92

12.1

1.72 1.60 3.81 3.54 6.70

10.3

1.53 1.40 3.40 3.16 5.98 9.25

1.40 1.27 3.09 2.85 5.47 8.49

0.08~0.26

0.0700.0700.150.150.240.40

CG1-60R1CG1-80R1CG1-100R1CG1-120R1

6080

100120

6080

100120

1 3°35' 10

30354040

60.1280.16

100.2120.24

6282

102122

6383

103123

10 10 20

38485868

8.6914.721.930.5

7.3912.619.026.7

6.1410.516.022.5

5.249.11

13.919.6

4.788.30

12.718.0

4.397.72

11.916.7

0.06~0.24

0.250.430.660.91


ratioNo. of teeth

Number of starts

Helix angleHand thread


BG1-20R1 J Bore H1T BG1-20R2 J Bore H1T BG1-30R1 J Bore H1T H1T BG1-30R2 J Bore H1T H1T BG1-40R1 J Bore H1T H1K H1K BG1-50R1 J Bore H1T H1K H1K H1K H1K H1K H1KBG1.25-20R1 J Bore H1T H1T BG1.25-20R2 J Bore H1T H1T BG1.25-30R1 J Bore H1T H1T H1K H1K BG1.25-30R2 J Bore H1T H1T H1K H1K BG1.25-40R1 J Bore H1T H1K H1K H1K H1K H1K H1K BG1.25-50R1 J Bore H1T H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K CG1-60R1 J Bore H1K H1K H1K H1K H1K H1KCG1-80R1 J Bore H1K H1K H1K H1K H1K H1K H1K H1KCG1-100R1 J Bore H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K CG1-120R1 J Bore H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K

6 8 10 12 14 15 16 17 18 19 20 22 ― 4 × 1.8 5 × 2.3 6 × 2.8

M4 M5 M4 M5

① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.③ Keyways are made according to JIS B1301 standards, Js9 tolerance.④ Certain products which would otherwise have a very long tapped hole are counterbored to reduce the length of the tap.⑤ For products having a tapped hole, a set screw is included.⑥ When using H1T set screws for fastening gears to a shaft, only use this method for light loads. For secure fastening,

please use dowel pins in combination.



L = Half of hub length (F) L = Half of hub length (F)

AH7 Bore

B Hub dia.

C Pitch dia.

D Throat dia.

D' Outside dia.

E Face width

F Hub width

G Total length


（ I ） Web O.D.

J Mounting distance

394 395

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Sp

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Hel

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Gea

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Gea

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Bev

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rod

ucts


Steel WormsModule 1.5SW

R

P Q

L M N O

W1

Bronze Worm Wheels & Gray Iron Worm WheelsModule 1.5BG・CG


(kg)Catalog No.


40――

4 x 1.8

―M5M4

―55

0.120.120.11

SW1.5-R1

•SW1.5-R1J8

•SW1.5-R1J10

40――

4 x 1.8

―M5M4

―55

0.120.120.11

SW1.5-R2

•SW1.5-R2J8

•SW1.5-R2J10


Normal module

Number of starts


LH7 M N O P Q Q'SW1.5-R1

•SW1.5-R1J8

•SW1.5-R1J10m1.5

1 3°26' RW1W1TW1K

88

1020 25 28 30 10 ―

SW1.5-R2

•SW1.5-R2J8

•SW1.5-R2J102 6°54' R

W1W1TW1K

88

1020 25 28 30 10 ―



[Caution on Product Characteristics] ① Worm Wheels are profile shifted to create the proper center distance.② The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 358 for more details.

Series Steel Worms

SW

R

P Q

L M N O

S

W1T

R

P Q

L M N O

S

W1K


Specifications

Precision grade KHK W 001 grade 4 ＊Referencesection of gear Normal plane



Material S45C

Heat treatment ―





② Gear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat treating as it will create bad tooth con-tact causing abrasion of the wheel.

[Caution on J series] ① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.

② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.③ Keyways are made according to JIS B1301 standards, Js9 tolerance.④ Areas of products which have been re-worked will not be black oxide coated.⑤ For products having a tapped hole, a set screw is included.

BG・CG

Bore H7

Keyway Js9


8 10 12 14 15 16 17 18 19 20 22 25 28 30 ― 4 × 1.8 5 × 2.3 6 × 2.8 8 × 3.3

M5 M4 M5 M6BG1.5-20R1BG1.5-20R2BG1.5-30R1BG1.5-30R2BG1.5-40R1BG1.5-50R1

201030154050

202030304050

121211

3°26'6°54'3°26'6°54'3°26'3°26'

R H1

88

10101212

222230303040

30.0530.2245.0845.3360.1175.13

333348486378

34.534.549.549.564.579.5

121212121214

10

222222222224

27.527.5353542.550

4.76 4.75

10.1 10.1 17.2 30.4

3.96 3.85 8.47 8.37

14.5 25.6

3.10 2.89 6.72 6.40

11.7 20.8

2.56 2.38 5.67 5.26 9.96

17.8

2.27 2.08 5.03 4.67 8.86

16.0

2.06 1.87 4.55 4.20 8.04

14.60.08~0.26

0.100.100.220.220.350.65

CG1.5-30R1CG1.5-40R1CG1.5-50R1CG1.5-60R1CG1.5-80R1CG1.5-100R1

3040506080

100

3040506080

100

1 3°26'

101212121515

303040405050

45.0860.1175.1390.16

120.22150.27

48637893

123153

49.564.579.594.5

124.5154.5

121214141414

222224242424

3542.55057.572.587.5

6.0410.318.225.543.164.4

5.088.71

15.421.636.855.6

4.037.01

12.517.630.145.8

3.405.98

10.715.126.340.1

3.025.319.59

13.723.836.4

2.734.838.74

12.421.933.6

0.180.280.530.731.281.93

GE F

J

A B D’DC

L

GE F

J

A B D’DC

AH7 Bore

B Hub dia.

C Pitch dia.

D Throat dia.

D' Outside dia.

E Face width

F Hub width

G Total length


（ I ） Web O.D.

J Mounting distance

Specifications






＊ The precision grade of J Series products is equiva-lent to the value shown in the table.


Series

H1T

GE F

J

A B D’DC

L

H1K

NOTE 1 : Allowable torque based on worm spee (rpm)


(mm)

Weight

(kg)30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpmCatalog No.

Reduction ratio

No. of teeth

Number of starts



BG1.5-20R1 J BORE H1T H1K BG1.5-20R2 J BORE H1T H1K BG1.5-30R1 J BORE H1K H1K H1K H1K H1K H1K BG1.5-30R2 J BORE H1K H1K H1K H1K H1K H1K BG1.5-40R1 J BORE H1K H1K H1K H1K H1K BG1.5-50R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1K CG1.5-30R1 J BORE H1K H1K H1K H1K H1K H1K CG1.5-40R1 J BORE H1K H1K H1K H1K H1K CG1.5-50R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1K CG1.5-60R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1K CG1.5-80R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K CG1.5-100R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K

① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.③ Keyways are made according to JIS B1301 standards, Js9 tolerance.④ Certain products which would otherwise have a very long tapped hole are counterbored to reduce the length of the tap.⑤ For products having a tapped hole, a set screw is included.⑥ When using H1T set screws for fastening gears to a shaft, only use this method for applications with the usage for light

loads. For secure fastening, please use dowel pins in combination.


H1


L = 5mm L = 5mm

396 397

Sp

urG

ears

Hel

ical

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tern

alG

ears

Rac

ksC

P R

acks

& P

inio

nsM

iter

Gea

rsB

evel

Gea

rsS

crew

Gea

rsW

orm

Gea

r P

airs

Bev

elG

earb

oxes

Oth

erP

rod

ucts

Sp

urG

ears

Hel

ical

Gea

rsIn

tern

alG

ears

Rac

ksC

P R

acks

& P

inio

nsM

iter

Gea

rsB

evel

Gea

rsS

crew

Gea

rsW

orm

Gea

r P

airs

Bev

elG

earb

oxes

Oth

erP

rod

ucts

BG2-20R1BG2-20R2

2010

20

12

3°42'7°25'

RH1

12

33

40.0840.34

44 46

22 13 35

― ― 35.5

12.3 12.3

10.2 10.0

8.00 7.51

6.59 6.15

5.78 5.32

5.25 4.80

0.10~0.28

0.33BG2-20L1BG2-20L2

2010

12

3°42'7°25'

L40.0840.34

12.3 12.3

10.2 10.0

8.00 7.51

6.59 6.15

5.78 5.32

5.25 4.80

CG2-20R1CG2-20R2CG2-30R1CG2-30R2CG2-40R1

2010301540

2020303040

12121

3°42'7°25'3°42'7°25'3°42' R

H1

3333404045

40.0840.3460.1360.5180.17

4444646484

4646666686

― ―

35.535.545.545.555.5

7.387.40

15.615.726.7

6.156.00

13.113.122.5

4.804.51

10.49.96

18.1

3.953.698.748.15

15.4

3.473.197.707.18

13.55

3.152.886.966.45

12.3

0.27 0.270.570.570.96

CG2-50R1CG2-50R2CG2-60R1

502560

505060

121

3°42'7°25'3°42'

HB484860

100.21100.84120.25

104104124

106106126

(7)(88)(88)

(108)

65.565.575.5

40.340.756.4

34.134.047.9

27.626.938.9

23.622.433.3

21.019.629.9

19.117.827.2

1.011.011.44

CG2-20L1CG2-20L2CG2-30L1CG2-30L2CG2-40L1

2010301540

2020303040

12121

3°42'7°25'3°42'7°25'3°42' L

H1

3333404045

40.0840.3460.1360.5180.17

4444646484

4646666686

― ―

35.535.545.545.555.5

7.387.40

15.615.726.7

6.156.00

13.113.122.5

4.804.51

10.49.96

18.1

3.953.698.748.15

15.4

3.473.197.707.18

13.55

3.152.886.966.45

12.3

0.270.270.570.570.96

CG2-50L1CG2-50L2CG2-60L1

502560

505060

121

3°42'7°25'3°42'

HB484860

100.21100.84120.25

104104124

106106126

(7)(88)(88)

(108)

65.565.575.5

40.340.756.4

34.134.047.9

27.626.938.9

23.622.433.3

21.019.629.9

19.117.827.2

1.011.011.44

Steel WormsModule 2SW

R

P Q

L M N O

W1

Bronze Worm Wheels & Gray Iron Worm WheelsModule 2BG・CG


Normal module

Number of starts


LH7 M N O P Q Q'SW2-R1

•SW2-R1J12

•SW2-R1J14

m2

1 3°42' RW1W1KW1K

121214

25 31 35 32 14 ―

SW2-R2

•SW2-R2J12

•SW2-R2J142 7°25' R

W1W1KW1K

121214

25 31 35 32 14 ―

SW2-L1

•SW2-L1J12

•SW2-L1J141 3°42' L

W1W1KW1K

121214

25 31 35 32 14 ―

SW2-L2

•SW2-L2J12

•SW2-L2J142 7°25' L

W1W1KW1K

121214

25 31 35 32 14 ―

* For [Caution on J Series], please see Page 395.* Please see Page 394 for Cautions on Product Characteristics and Cautions on Performing Secondary Operations.

Series Steel Worms

SW

R

P Q

L M N O

S

W1K


(kg)Catalog No.


46―

4 x 1.85 x 2.3

―M4M4

―77

0.200.200.18

SW2-R1

•SW2-R1J12

•SW2-R1J14

46―

4 x 1.85 x 2.3

―M4M4

―77

0.200.200.18

SW2-R2

•SW2-R2J12

•SW2-R2J14

46―

4 x 1.85 x 2.3

―M4M4

―77

0.200.200.18

SW2-L1

•SW2-L1J12

•SW2-L1J14

46―

4 x 1.85 x 2.3

―M4M4

―77

0.200.200.18

SW2-L2

•SW2-L2J12

•SW2-L2J14


Specifications




Material S45C

Heat treatment ―






① Please read “Caution on Performing Secondary Operations” (Page 362) when performing modifi-cations and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.

② Gear tooth hardening of the worm reduces the precision (introduces errors in the lead and pres-sure angles). Avoid heat treating as it will create bad tooth contact causing abrasion of the wheel.





BG・CG

＊＊CS has a sand mold casting finish.

GE F

J

A B D’DC A B C D D’

( I )

J

GE F

(H)

CS

CS

HB

AH7 Bore

B Hub dia.

C Pitch dia.

D Throat dia.

D' Outside dia.

E Face width

F Hub width

G Length


（ I ） Web O.D.

J Mounting distance

Specifications






Series

GE F

J

A B D’DC

L

H1K

A B C D D’

( I )

J

GE F

(H)

CS

CS

L

HBKH1


(mm)

Weight

(kg)30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpmCatalog No. Reduc-

tion ratioNo. of teeth

Number of starts

Helixangle

Handthread


Bore H7

Keyway Js9

Screw sizeCatalog No.BG2-20R1 J BORE H1K H1K H1K H1K H1K BG2-20R2 J BORE H1K H1K H1K H1K H1K BG2-20L1 J BORE H1K H1K H1K H1K H1K BG2-20L2 J BORE H1K H1K H1K H1K H1K CG2-20R1 J BORE H1K H1K H1K H1K H1KCG2-20R2 J BORE H1K H1K H1K H1K H1KCG2-30R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1KCG2-30R2 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1KCG2-40R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1K H1KCG2-50R1 J BORE HBK HBK HBK HBK HBK HBK HBK HBK HBK HBK HBKCG2-50R2 J BORE HBK HBK HBK HBK HBK HBK HBK HBK HBK HBK HBKCG2-60R1 J BORE HBK HBK HBK HBK HBK HBK HBK HBK HBK HBK HBK HBK HBK HBKCG2-20L1 J BORE H1K H1K H1K H1K H1KCG2-20L2 J BORE H1K H1K H1K H1K H1KCG2-30L1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1KCG2-30L2 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1KCG2-40L1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1K H1KCG2-50L1 J BORE HBK HBK HBK HBK HBK HBK HBK HBK HBK HBK HBKCG2-50L2 J BORE HBK HBK HBK HBK HBK HBK HBK HBK HBK HBK HBKCG2-60L1 J BORE HBK HBK HBK HBK HBK HBK HBK HBK HBK HBK HBK HBK HBK HBK

12 14 15 16 17 18 19 20 22 25 28 30 32 35 4 × 1.8 5 × 2.3 6 × 2.8 8 × 3.3 10 × 3.3

M4 M5 M6 M8





L = 6.5mm L = 6.5mm

398 399

Sp

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crew

Gea

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Gea

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airs

Bev

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earb

oxes

Oth

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rod

ucts

Sp

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ears

Hel

ical

Gea

rsIn

tern

alG

ears

Rac

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P R

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& P

inio

nsM

iter

Gea

rsB

evel

Gea

rsS

crew

Gea

rsW

orm

Gea

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airs

Bev

elG

earb

oxes

Oth

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rod

ucts

BG2.5-20R1BG2.5-20R2

2010

20

12

3°52'7°46'

RH1 12 35

50.1150.46

55 57.5

22 14 36

― ― 43.5

21.5 21.5

17.7 17.3

13.8 13.0

11.4 10.6

9.94 9.14

9.07 8.27

0.13~0.31

0.49BG2.5-20L1BG2.5-20L2

2010

12

3°52'7°46'

L50.1150.46

21.5 21.5

17.7 17.3

13.8 13.0

11.4 10.6

9.94 9.14

9.07 8.27

CG2.5-20R1CG2.5-20R2CG2.5-30R1CG2.5-30R2CG2.5-40R1

2010301540

2020303040

12121

3°52'7°46'3°52'7°46'3°52' R

H1H1H1H1HB

1212121215

3535404045

50.1150.4675.1775.68

100.23

55558080

105

57.557.582.582.5107.5

――――(9)

――――(86)

43.543.5565668.5

12.912.927.327.546.7

10.610.422.822.539.0

8.307.7818.017.231.3

6.836.3615.114.126.5

5.975.4913.212.323.3

5.444.9612.011.121.2

0.400.400.820.821.02

CG2.5-50R1CG2.5-50R2CG2.5-60R1

502560

505060

121

3°52'7°46'3°52'

HB 15505055

125.29126.16150.34

130130155

132.5132.5157.5

(9)(110)(110)(136)

818193.5

70.671.198.8

59.058.682.9

47.846.467.3

40.738.657.6

36.133.651.5

33.030.747.0

1.461.461.93

CG2.5-20L1CG2.5-20L2CG2.5-30L1CG2.5-30L2CG2.5-40L1

2010301540

2020303040

12121

3°52'7°46'3°52'7°46'3°52' L

H1H1H1H1HB

1212121215

3535404045

50.1150.4675.1775.68

100.23

55558080

105

57.557.582.582.5107.5

――――(9)

――――(86)

43.543.5565668.5

12.912.927.327.546.7

10.610.422.822.539.0

8.307.7818.017.231.3

6.836.3615.114.126.5

5.975.4913.212.323.3

5.444.9612.011.121.2

0.400.400.820.821.02

CG2.5-50L1CG2.5-50L2CG2.5-60L1

502560

505060

121

3°52'7°46'3°52'

HB 15505055

125.29126.16150.34

130130155

132.5132.5157.5

(9)(110)(110)(136)

818193.5

70.671.198.8

59.058.682.9

47.846.467.3

40.738.657.6

36.133.651.5

33.030.747.0

1.461.461.93

Steel WormsModule 2.5SW

R

P Q

L M N O

W1

Bronze Worm Wheels & Gray Iron Worm WheelsModule 2.5BG・CG

Series Steel Worms

SW

R

P Q

L M N O

S

W1K


(kg)Catalog No.


63―

5 x 2.35 x 2.35 x 2.3

―M4M4M4

―999

0.390.390.370.36

SW2.5-R1•SW2.5-R1J15•SW2.5-R1J16•SW2.5-R1J17

63―

5 x 2.35 x 2.35 x 2.3

―M4M4M4

―999

0.390.390.370.36

SW2.5-R2•SW2.5-R2J15•SW2.5-R2J16•SW2.5-R2J17

63―

5 x 2.35 x 2.35 x 2.3

―M4M4M4

―999

0.390.390.370.36

SW2.5-L1•SW2.5-L1J15•SW2.5-L1J16•SW2.5-L1J17

63―

5 x 2.35 x 2.35 x 2.3

―M4M4M4

―999

0.390.390.370.36





Normal module

Number of starts


LH7 M N O P Q Q'SW2.5-R1•SW2.5-R1J15•SW2.5-R1J16•SW2.5-R1J17

m2.5

1 3°52' RW1W1KW1KW1K

15151617

30 37 42 45 18 ―

SW2.5-R2•SW2.5-R2J15•SW2.5-R2J16•SW2.5-R2J172 7°46' R

W1W1KW1KW1K

15151617

30 37 42 45 18 ―


1 3°52' LW1W1KW1KW1K

15151617

30 37 42 45 18 ―


2 7°46' LW1W1KW1KW1K

15151617

30 37 42 45 18 ―

Specifications



Material S45C

Heat treatment ―





[Caution on Secondary Operations]① Please read “Caution on Performing Secondary Operations” (Page 362) when perform-

ing modifications and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.






BG・CG


GE F

J


( I )

J

GE F

(H)

CS

CS

HB

AH7 Bore

B Hub dia.

C Pitch dia.

D Throat dia.

D' Outside dia.

E Face width

F Hub width

G Length


（ I ） Web O.D.

J Mounting distance

Series

GE F

J

A B D’DC

L

H1K

A B C D D’

( I )

J

GE F

(H)

CS

CS

L

HBKH1


(mm)

Weight

(kg)30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpmCatalog No. Reduction

ratioNo. of teeth

Number of starts

Helixangle

Handthread


Bore H7

Keyway Js9


12 14 15 16 17 18 19 20 22 25 28 30 32 35 4 × 1.8 5 × 2.3 6 × 2.8 8 × 3.3 10 × 3.3

M4 M5 M6 M8




BG2.5-20R1 J BORE H1K H1K H1K H1K H1K H1K H1K BG2.5-20R2 J BORE H1K H1K H1K H1K H1K H1K H1K BG2.5-20L1 J BORE H1K H1K H1K H1K H1K H1K H1K BG2.5-20L2 J BORE H1K H1K H1K H1K H1K H1K H1K CG2.5-20R1 J BORE H1K H1K H1K H1K H1K H1K H1KCG2.5-20R2 J BORE H1K H1K H1K H1K H1K H1K H1KCG2.5-30R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1KCG2.5-30R2 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1KCG2.5-40R1 J BORE HBK HBK HBK HBK HBK HBK HBK HBKCG2.5-50R1 J BORE HBK HBK HBK HBK HBK HBK HBK HBK HBK HBKCG2.5-50R2 J BORE HBK HBK HBK HBK HBK HBK HBK HBK HBK HBKCG2.5-60R1 J BORE HBK HBK HBK HBK HBK HBK HBK HBK HBK HBK HBKCG2.5-20L1 J BORE H1K H1K H1K H1K H1K H1K H1KCG2.5-20L2 J BORE H1K H1K H1K H1K H1K H1K H1KCG2.5-30L1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1KCG2.5-30L2 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1KCG2.5-40L1 J BORE HBK HBK HBK HBK HBK HBK 5,890 HBKCG2.5-50L1 J BORE HBK HBK HBK HBK HBK HBK 6,680 HBK HBK HBKCG2.5-50L2 J BORE HBK HBK HBK HBK HBK HBK 6,680 HBK HBK HBKCG2.5-60L1 J BORE HBK HBK HBK HBK HBK HBK 7,690 HBK HBK HBK HBK


Specifications






L = 7mm L = 7mm

* Please see Page 394 for Cautions on Product Characteristics and Cautions on Performing Secondary Operations. * For [Caution on J Series], please see Page 395.

400 401

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ucts BG3-20R1

BG3-20R22010

20

12

3°55'7°50' R

H1

20

50

60.1460.57

66 69 28

15

43 ― ― 52

36.8 37.0

30.1 29.5

23.5 22.1

19.1 17.9

16.7 15.4

15.2 14.0

0.15~0.33

0.89BG3-20L1BG3-20L2

2010

12

3°55'7°50' L 60.14

60.5736.8 37.0

30.1 29.5

23.5 22.1

19.1 17.9

16.7 15.4

15.2 14.0


2010301540

2020303040

12121

3°55'7°50'3°55'7°50'3°55' R

H1H1H1H1HB

5050555555

60.1460.5790.2190.85

120.28

66669696

126

69699999

129

2828282830

4343434345

――――(9)

――――

(107)

5252676782

22.122.246.647.279.8

18.117.738.738.566.3

14.113.330.629.353.2

11.510.725.423.744.6

10.09.24

22.220.839.1

―

0.730.731.501.501.79

CG3-50R1CG3-50R2CG3-60R1

502560

505060

121

3°55'7°50'3°55'

HB636370

150.35151.41180.42

156156186

159159189

30 45 (9)(138)(138)(166)

9797

112

121122169

100100141

81.179.1

114

68.465.196.7

60.556.786.3

2.502.503.40


2010301540

2020303040

12121

3°55'7°50'3°55'7°50'3°55' L

H1H1H1H1HB

5050555555

60.1460.5790.2190.85

120.28

66669696

126

69699999

129

2828282830

4343434345

――――(9)

――――

(107)

5252676782

22.122.246.647.279.8

18.117.738.738.566.3

14.113.330.629.353.2

11.510.725.423.744.6

10.09.24

22.220.839.1

0.730.731.501.501.79

CG3-50L1CG3-50L2CG3-60L1

502560

505060

121

3°55'7°50'3°55'

HB636370

150.35151.41180.42

156156186

159159189

30 45 (9)(138)(138)(166)

9797

112

121122169

100100141

81.179.1

114

68.465.196.7

60.556.786.3

2.502.503.40


R

P Q

L M N O

W1


Series


Steel Worms

R

P Q

L M N O

S

W1K


(kg)Catalog No.


70

―5 x 2.36 x 2.86 x 2.86 x 2.8

―M4M5M5M5

―10101010

0.640.620.600.580.56

SW3-R1•SW3-R1J17•SW3-R1J18•SW3-R1J19•SW3-R1J20

70

―5 x 2.36 x 2.86 x 2.86 x 2.8

―M4M5M5M5

―10101010

0.640.620.600.580.56


70

―5 x 2.36 x 2.86 x 2.86 x 2.8

―M4M5M5M5

―10101010

0.640.620.600.580.56

SW3-L1•SW3-L1J17•SW3-L1J18•SW3-L1J19•SW3-L1J20

70

―5 x 2.36 x 2.86 x 2.86 x 2.8

―M4M5M5M5

―10101010

0.640.620.600.580.56



BG・CG



② Gear tooth hardening of the worm reduces the precision (introduc-es errors in the lead and pressure angles). Avoid heat treating as it will create bad tooth contact causing abrasion of the wheel.

Specifications


Gear teeth Standard full depthNormalpressure angle 14° 30'

Material S45C

Heat treatment ―Tooth hardness (less than 194HB)







GE F

J


( I )

JGE F

(H)CS

CS

HB

Specifications






Series

GE F

J

A B D’DC

L

H1K

A B C D D’

( I )

J

GE F

(H)

CS

CS

L

HBKH1

E F G （H）（ I ） JAllowable torque (N·m) NOTE 1 Backlash

(mm)

Weight

(kg)30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpmCatalog No. Reduction

ratioNo. of teeth

Number of starts

Helix angleHand thread Shape AH7 B C D D'

Bore H7

Keyway Js9





AH7 Bore

B Hub dia.

C Pitch dia.

D Throat dia.

D' Outside dia.

E Face width

F Hub width

G Total length


（ I ） Web O.D.

J Mounting distance20 22 25 28 30 32 35 40

6 × 2.8 8 × 3.3 10 × 3.3 12 × 3.3M5 M6 M8

BG3-20R1 J BORE H1K H1K H1K H1K H1K BG3-20R2 J BORE H1K H1K H1K H1K H1K BG3-20L1 J BORE H1K H1K H1K H1K H1K BG3-20L2 J BORE H1K H1K H1K H1K H1K CG3-20R1 J BORE H1K H1K H1K H1K H1K CG3-20R2 J BORE H1K H1K H1K H1K H1K CG3-30R1 J BORE H1K H1K H1K H1K H1K H1KCG3-30R2 J BORE H1K H1K H1K H1K H1K H1KCG3-40R1 J BORE HBK HBK HBK HBK HBK HBKCG3-50R1 J BORE HBK HBK HBK HBK HBK HBK HBKCG3-50R2 J BORE HBK HBK HBK HBK HBK HBK HBKCG3-60R1 J BORE HBK HBK HBK HBK HBK HBK HBK HBKCG3-20L1 J BORE H1K H1K H1K H1K H1KCG3-20L2 J BORE H1K H1K H1K H1K H1KCG3-30L1 J BORE H1K H1K H1K H1K H1K H1KCG3-30L2 J BORE H1K H1K H1K H1K H1K H1KCG3-40L1 J BORE HBK HBK HBK HBK HBK HBKCG3-50L1 J BORE HBK HBK HBK HBK HBK HBK HBKCG3-50L2 J BORE HBK HBK HBK HBK HBK HBK HBKCG3-60L1 J BORE HBK HBK HBK HBK HBK HBK HBK HBK

① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order.

Please allow additional shipping time to get to your local distributor.


③ Keyways are made according to JIS B1301 standards, Js9 tolerance.

④ Certain products which would otherwise have a very long tapped hole are counterbored to reduce the length of the tap.

⑤ For products having a tapped hole, a set screw is included.


To order J Series products, please specify; Catalog No. + J + BORE ＊ The product shapes of J Series items are identified by background color.

L = 7.5mm L = 7.5mm


Normal module

Number of starts


LH7 M N O P Q Q'SW3-R1•SW3-R1J17•SW3-R1J18•SW3-R1J19•SW3-R1J20

m3

1 3°55' R

W1W1KW1KW1KW1K

1617181920

35 44 50 50 20 ―


2 7°50' R

W1W1KW1KW1KW1K

1617181920

35 44 50 50 20 ―


1 3°55' L

W1W1KW1KW1KW1K

1617181920

35 44 50 50 20 ―


2 7°50' L

W1W1KW1KW1KW1K

1617181920

35 44 50 50 20 ―


SW

* Please see Page 394 for Cautions on Product Characteristics and Cautions on Performing Secondary Operations.

402 403

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R

P Q

L M N O

W1



(kg)Catalog No.

R Size S9595

――

――

1.761.76

SW4-R1SW4-R2

9595

――

――

1.761.76

SW4-L1SW4-L2


Number of starts


LH7 M N O P Q Q'SW4-R1SW4-R2 m4 1

23°42'7°25'

RR

W1W1

2222

5050

6262

7070

7070

2525

――

SW4-L1SW4-L2 m4 1

23°42'7°25'

LL

W1W1

2222

5050

6262

7070

7070

2525

――


ratioNormalmodule

No. of teeth

Number of starts


AH7 B C D D' EBG4-20R1BG4-20R2

2010

m4

2020

12

3°42'7°25'

RR

H1H1

2020

6060

80.1780.67

8888

9090

3535

BG4-20L1BG4-20L2

2010

2020

12

3°42'7°25'

LL

H1H1

2020

6060

80.1780.67

8888

9090

3535


ratioNormalmodule

No. of teeth

Number of starts


AH7 B C D D' ECG4-20R1CG4-20R2CG4-30R1CG4-30R2CG4-40R1

2010301540

m4

2020303040

12121

3°42'7°25'3°42'7°25'3°42'

RRRRR

H1H1HBHBHB

2020202020

6060606070

80.1780.67

120.25121.01160.33

8888

128128168

9090

130130171

3535353535

CG4-50R1CG4-50R2CG4-60R1

502560

505060

121

3°42'7°25'3°42'

RRR

H2H2H2

202020

707080

200.42201.69240.5

208208248

211211251

353535


2010301540

2020303040

12121

3°42'7°25'3°42'7°25'3°42'

LLLLL

H1H1HBHBHB

2020202020

6060606070

80.1780.67

120.25121.01160.33

8888

128128168

9090

130130171

3535353535

CG4-50L1CG4-50L2CG4-60L1

502560

505060

121

3°42'7°25'3°42'

LLL

H2H2H2

202020

707080

200.42201.69240.5

208208248

211211251

353535


Specifications





Material S45C

Heat treatment ―





[Caution on Product Characteristics] ① Worm Wheels are profile shifted to create the proper center distance.② H2 Shape Worm Gears have elongated casting holes in the web (H).③ The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 358 for more details.

Steel Worms

SW


（H

( I )

J

A B C D D

GE F

CS

CS

’

）

A B C D D’

( I )

J

GE F

(H)

CS

CS



H2HB


(mm)

Weight

(kg)Catalog No.

F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm


(mm)

Weight

(kg)Catalog No.



1717171717

5252525252

――

(12)(12)(11)

――

(96)(96)

(136)

71719191

111

45.645.596.396.8

165

37.036.079.178.3

136

28.726.962.359.4

108

23.021.450.947.389.4

0.17~0.370.17~0.370.17~0.370.17~0.370.17~0.37

1.561.562.522.523.81


171717

525252

(12)(12)(12)

(176)(176)(218)

131131151

249250348

205204288

165160233

137130194

0.17~0.370.17~0.370.17~0.37

4.784.786.36

CG4-50R1CG4-50R2CG4-60R1

1717171717

5252525252

――

(12)(12)(11)

――

(96)(96)

(136)

71719191

111

45.645.596.396.8

165

37.036.079.178.3

136

28.726.962.359.4

108

23.021.450.947.389.4

0.17~0.370.17~0.370.17~0.370.17~0.370.17~0.37

1.561.562.522.523.81


171717

525252

(12)(12)(12)

(176)(176)(218)

131131151

249250348

205204288

165160233

137130194

0.17~0.370.17~0.370.17~0.37

4.784.786.36

CG4-50L1CG4-50L2CG4-60L1

1717

5252

7171

75.9 75.9

61.7 60.0

47.9 44.8

38.4 35.7

33.7 30.9

30.1 27.5

0.17~0.370.17~0.37

1.911.91

BG4-20R1BG4-20R2

1717

5252

7171

75.9 75.9

61.7 60.0

47.9 44.8

38.4 35.7

33.7 30.9

30.1 27.5

0.17~0.370.17~0.37

1.911.91

BG4-20L1BG4-20L2


Specifications

Catalog No. BG CG

Precision grade KHK W 002 grade 4 KHK W 002 grade 4Referencesection of gear Normal plane Normal plane

Gear teeth Standard full depth Standard full depth

Normalpressure angle 14° 30' 14° 30'

Material CAC502（formerly JIS PBC2） FC200 ＊Heat treatment ― ―

Tooth ardness ― ―

GE F

J

A B D’DC

H1

BG・CG

＊ FC200’s tensile strength (200N/mm2) is derived from test specimens and differs according to the product shape.

404 405

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ucts


Steel WormsSteel WormsModule 5、6SW

R

P QQ’

L M N O

W3

Bronze Worm Wheels & Gray Iron Worm WheelsModule 5、6BG・CG


(kg)Catalog No.

R Size S125125

――

――

2.862.86

SW5-R1SW5-R2

150150

――

――

4.384.38

SW6-R1SW6-R2


Number of starts


LH7 M N O P Q Q'SW5-R1SW5-R2 m5 1

24°06'8°13'

RR

W3W3

2525

5656

7070

8080

8585

2020

2020

SW6-R1SW6-R2 m6 1

24°18'8°38'

RR

W3W3

3030

6464

8080

9292

100100

2525

2525


ratioNormalmodule

No. of teeth

Number of starts


AH7 B C D D' EBG5-20R1BG5-20R2

2010 m5 20

2012

4°06'8°13'

RR

H1H1

2222

7575

100.26101.04

110110

113113

4545

BG6-20R1BG6-20R2

2010 m6 20

2012

4°18'8°38'

RR

H1H1

2525

100100

120.34121.38

132132

136136

5252


ratioNormalmodule

No. of teeth

Number of starts


AH7 B C D D' ECG5-20R1CG5-20R2CG5-30R1CG5-30R2CG5-40R1

2010301540 m5

2020303040

12121

4°06'8°13'4°06'8°13'4°06'

RRRRR

H1H1HBHBH2

2222222222

7575757590

100.26101.04150.38151.56200.51

110110160160210

113113163163213

4545454545

CG5-50R1CG5-50R2CG5-60R1

502560

505060

121

4°06'8°13'4°06'

RRR

H2H2H2

222222

9090

100

250.61252.59300.77

260260310

263263313

454545


2010301540 m6

2020303040

12121

4°18'8°38'4°18'8°38'4°18'

RRRRR

H1H1HBHBH2

2525252525

100100100100100

120.34121.38180.51182.06240.68

132132192192252

136136196196256

5252525252

CG6-50R1CG6-50R2CG6-60R1

502560

505060

121

4°18'8°38'4°18'

RRR

H2H2H2

252525

100100120

300.85303.44361.02

312312372

316316376

525252

Specifications

Catalog No. BG CG

Precision grade KHK W 002 grade 4 KHK W 002 grade 4Referencesection of gear Normal plane Normal plane

Gear teeth Standard full depth Standard full depth

Normalpressure angle 14° 30' 14° 30'

Material CAC502（formerly JIS PBC2） FC200 ＊Heat treatment ― ―

Tooth hardness ― ―


[Caution on Product Characteristics] ① Worm Wheels are profile shifted to create the proper center distance.② H2 Shape Worm Gears have elongated casting holes in the web (H).③ The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 358 for more details.

SW




（H

( I )

J

A B C D D

GE F

CS

CS

’

）

A B C D D’

( I )

J

GE F

(H)

CS

CS

BG・CG

H2HB


(mm)

Weight

(kg)Catalog No.

F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm


(mm)

Weight

(kg)Catalog No.



2020202020

6565656565

――

(13)(13)(16)

――

(127)(127)(172)

8585

110110135

87.487.9

185187316

70.368.9

150150258

54.751.5

119114206

43.841.096.890.6

170

0.20~0.400.20~0.400.20~0.400.20~0.400.20~0.40

3.183.184.784.787.44


202020

656565

(16)(16)(14)

(223)(223)(276)

160160185

477483668

390390548

315307443

261249369

0.20~0.400.20~0.400.20~0.40

9.799.79

12.0

CG5-50R1CG5-50R2CG5-60R1

2020202020

7272727272

――

(15)(15)(15)

――

(155)(155)(213)

100100130130160

139141294299502

111110237238407

86.281.8

187181325

―――――

0.22~0.420.22~0.420.22~0.420.22~0.420.22~0.42

5.395.398.288.28

10.9


202020

727272

(16)(16)(17)

(275)(275)(336)

190190220

760774

1060

615620865

496488698

―――

0.22~0.420.22~0.420.22~0.42

14.014.019.8

CG6-50R1CG6-50R2CG6-60R1

2020

6565

8585

146 146

117 115

91.2 85.8

73.0 68.4

63.7 58.8

56.9 52.2

0.20~0.400.20~0.40

3.893.89

BG5-20R1BG5-20R2

2020

7272

100100

232 235

185 183

144 136

115 109

99.2 92.3

88.882.0

0.22~0.420.22~0.42

6.606.60

BG6-20R1BG6-20R2




GE F

J

A B D’DC

H1

Specifications





Material S45C

Heat treatment ―



＊ FC200’s tensile strength (200N/mm2) is derived from test specimens and differs according to the product shape.

406 407

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Hel

ical

Gea

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Rac

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Gea

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Gea

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orm

Gea

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Bev

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ucts


Stainless Steel WormsModule 0.5、0.8SUW

Plastic Worm WheelsModule 0.5、0.8DG

Specifications

Precision grade KHK W 002 grade 5Referencesection of gear Normal plane



Material Polyacetal

Heat treatment ―

Tooth hardness ―

R

S

N OL

P

W2

Set Screw Weight

(kg)Catalog No.

Size S

M3M3

33

0.010 0.010

SUW0.5-R1SUW0.5-R2

M4M4

55

0.029 0.029

SUW0.8-R1SUW0.8-R2


Number of starts

Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length

LH8 M N O P Q R

SUW0.5-R1SUW0.5-R2

m0.5 12

2°36'5°13'

RR

W2W2

55

――

1111

1212

――

――

1818

SUW0.8-R1SUW0.8-R2

m0.8 12

3°17'6°34'

RR

W2W2

66

――

1414

15.615.6

――

――

3030

J

GE F

A B C D’

HA

Hub width Total length Mounting distance Allowable torque (N·m) Allowable torque kgf·m) Backlash

(mm)

Weight

(g)Catalog No.

F G J Bending strength Bending strength

77777

1212121212

10.510.5131315.5

0.067 0.067 0.11 0.11 0.16

0.0068 0.0069 0.011 0.011 0.016

0~0.160~0.160~0.160~0.160~0.16

1.01 1.01 2.21 2.21 3.72

DG0.5-20R1DG0.5-20R2DG0.5-30R1DG0.5-30R2DG0.5-40R1

77

1212

1820.5

0.21 0.26

0.022 0.027

0~0.160~0.16

6.36 9.67

DG0.5-50R1DG0.5-60R1

99999

1818181818

1515191923

0.31 0.31 0.52 0.52 0.74

0.031 0.032 0.053 0.053 0.076

0.04~0.220.04~0.220.04~0.220.04~0.220.04~0.22

3.73 3.73 8.84 8.84

14.0


99

1818

2731

0.98 1.21

0.10 0.12

0.04~0.220.04~0.22

21.6 28.8

DG0.8-50R1DG0.8-60R1


ratioNormalmodule

No. of teeth

Number of starts


A B C D D' E


2010301540

m0.5

2020303040

12121

2°36'5°13'2°36'5°13'2°36'

RRRRR

HAHAHAHAHA

44445

99

121215

10.01 10.04 15.02 15.06 20.02

―――――

1111161621

55555

DG0.5-50R1DG0.5-60R1

5060

5060

11

2°36'2°36'

RR

HAHA

55

2025

25.03 30.03

――

2631

55


2010301540

m0.8

2020303040

12121

3°17'6°34'3°17'6°34'3°17'

RRRRR

HAHAHAHAHA

55556

1212181820

16.03 16.11 24.04 24.16 32.05

―――――

17.617.625.625.633.6

99999

DG0.8-50R1DG0.8-60R1

5060

5060

11

3°17'3°17'

RR

HAHA

88

2525

40.0748.08

――

41.649.6

99

－0.05－0.10




[Caution on Product Characteristics] ① Worm Wheels are profile shifted to create the proper center distance.② The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please

see Page 358 for more details.③ Since the bore is finished with a minus tolerance, you can use a shaft with a force fit.

Stainless Steel Worms

SUW

Plastic Worm Wheels

Specifications

Precision grade KHK W 001 grade 4Referencesection of gear Normal plane



Material SUS303

Heat treatment ―


DG

408 409

Sp

urG

ears

Hel

ical

Gea

rsIn

tern

alG

ears

Rac

ksC

P R

acks

& P

inio

nsM

iter

Gea

rsB

evel

Gea

rsS

crew

Gea

rsW

orm

Gea

r P

airs

Bev

elG

earb

oxes

Oth

erP

rod

ucts

Sp

urG

ears

Hel

ical

Gea

rsIn

tern

alG

ears

Rac

ksC

P R

acks

& P

inio

nsM

iter

Gea

rsB

evel

Gea

rsS

crew

Gea

rsW

orm

Gea

r P

airs

Bev

elG

earb

oxes

Oth

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ucts


Module 1、1.5SUW

Module 1、1.5PG


ratioNo. of teeth

Number of starts


ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width Total Length Mounting distance Allowable torque (N·m) Allowable torque kgf·m) Backlash

(mm)Weight

(kg)A B C D D' E F G J Bending strength Bending strength

PG1-20R1PG1-20R2PG1-30R1PG1-40R1PG1-50R1

2010304050

2020304050

12111

3°35'7°11'3°35'3°35'3°35'

RRRRR

H1H1H1H1H1

66688

1616202630

20.0420.1630.0640.0850.1

2222324252

2323334353

10 10 20

1818232833

0.620.621.031.491.96

0.060 0.060 0.10 0.15 0.20

0~0.280~0.280~0.280~0.280~0.28

0.00580.00580.0120.0210.031

PG1.5-20R1PG1.5-20R2

2010

2020

12

3°26'6°54'

RR

H1H1

88

2222

30.0530.22

3333

34.534.5 12 10 22 27.5

27.51.661.68

0.170.17

0~0.300~0.30

0.0140.014

R

S

N OL

P

W2

GE F

J

A B D’DC

H1


② Plastic gears are susceptible to the effects of temperature and moisture. Dimensional changes may oc-cur while performing secondary operations and during post-machining operations.


Plastic Worm Wheels


[Caution on Product Characteristics] ① For W2-shaped products, a set screw is included. When setting up the mating wheel, make sure no friction occurs within the set screw.


[Caution on Product Characteristics] ① Worm Wheels are profile shifted to create the proper center distance.② Significant variations in temperature or humidity can cause dimensional changes in plastic gears (MC Nylon gears), for

bore size (H8 when produced), tooth diameter, and backlash. Please see the section “Design of Plastic Gears” in separate technical reference book (Page 101).

③ The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 358 for more details.


Plastic Worm Wheels

R

P Q

L M N O

W1

PG

R

P Q

L M N O

S

W1T

R

P Q

L M N O

S

W1K

Keyway Set Screw Weight

(kg)Catalog No.

● : J Series (Available-on-request)Width×Depth Size S

――

M4M4

55

0.0420.042

SUW1-R1SUW1-R2

――

4 x 1.8

―M5M4

―55

0.120.120.11

SUW1.5-R1•SUW1.5-R1J8•SUW1.5-R1J10

――

4 x 1.8

―M5M4

―55

0.120.120.11


Series

Specifications




Material SUS303

Heat treatment ―



Normamodule

Number of starts

Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length

LH7(H8) M N O P Q R

SUW1-R1SUW1-R2 m1 1

23°35'7°11'

RR

W2W2

6 H8

6 H8

――

1616

1818

(20)(20)

――

3232


m1.5

1 3°26' RW1W1TW1K

88

1020 25 28 30 10 40


2 6°54' RW1W1TW1K

88

1020 25 28 30 10 40

① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order.

Please allow additional shipping time to get to your local distributor.② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we

need to quote price and lead time.③ Keyways are made according to JIS B1301 standards, Js9 tolerance.④ For products having a tapped hole, a set screw is included.


＊ The precision grade of this product is equivalent to the value shown in the table.


Specifications




Material MC901 Nylon


GE F

J

A B D’DC

L

Series

H1T

GE F

J

A B D’DC

L

H1K

＊ The product shapes of J Series items are identified by background color.

6 8 10 12 14 15 16 17― 4 × 1.8 5 × 2.3

M4 M5 M4

Bore Keyway Js9

Screw sizeCatalog No.PG1-20R1 J BORE H1TPG1-20R2 J BORE H1TPG1-30R1 J BORE H1T H1TPG1-40R1 J BORE H1T H1K H1KPG1-50R1 J BORE H1T H1K H1K H1K H1K H1K H1KPG1.5-20R1 J BORE H1T H1KPG1.5-20R2 J BORE H1T H1K

① As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.② Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.③ Keyways are made according to JIS B1301 standards, Js9 tolerance.④ Certain products which would otherwise have a very long tapped hole are counterbored to reduce the length of the tap.⑤ For products having a tapped hole, a set screw is included.⑥ When using H1T set screws for fastening gears to a shaft, only use this method for applications with light loads. For

secure fastening, please use dowel pins in combination.


To order J Series products, please specify; Catalog No. + J + BORE

L = 5mm L = 5mm

SUW

＊ In regards to MC Nylon gears, other materials are available, including Ultra High Molecular Weight Polyethylene (UHMW-PE), which has excellent abrasion resistance, and resin conforming to the Plastic Implementation Measure (PIM). A single piece order is acceptable and will be produced as a custom-made gear. For details on quotations and orders please see Page 16.

410 411

Sp

urG

ears

Hel

ical

Gea

rsIn

tern

alG

ears

Rac

ksC

P R

acks

& P

inio

nsM

iter

Gea

rsB

evel

Gea

rsS

crew

Gea

rsW

orm

Gea

r P

airs

Bev

elG

earb

oxes

Oth

erP

rod

ucts

Sp

urG

ears

Hel

ical

Gea

rsIn

tern

alG

ears

Rac

ksC

P R

acks

& P

inio

nsM

iter

Gea

rsB

evel

Gea

rsS

crew

Gea

rsW

orm

Gea

r P

airs

Bev

elG

earb

oxes

Oth

erP

rod

ucts


Module 2、2.5、3SUW

Specifications



Normalpressure angle 14° 30’ ＊＊Material SUS303

Heat treatment ―


Module 2、2.5、3PG

R

P Q

L M N O

W1

GE F

J

A B D’DC

H1


Plastic Worm Wheels


② Plastic gears are susceptible to the effects of temperature and moisture. Dimensional changes may occur while perform-ing secondary operations and during post-machining operations.



[Caution on Product Characteristics] ① Worm Wheels are profile shifted to create the proper center distance.② Significant variations in temperature or humidity can cause dimensional changes in plastic gears (MC Nylon gears), for bore size (H8 when

produced), tooth diameter, and backlash. Please see the section “Design of Plastic Gears” in separate technical reference book (Page 101).③ The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Usage above the value in brack-

ets will exceed the maximum allowable sliding speed, if no lubrication is applied. So, lubrication is required. Please see Page 358 for more details.

＊ The precision grade of J Series products is equivalent to the value shown in the table.＊＊ The pressure angle is at 20 degrees for module 2.5.

Series Stainless Steel Worms

R

P Q

L M N O

S

W1K

Plastic Worm Wheels

PG



③ Keyways are made according to JIS B1301 standards, Js9 tolerance.④ For products having a tapped hole, a set screw is included.



ratioNo. of teeth

Number of starts

Helix angle

Hand threadShape

Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width Total Length Mounting distance Allowable torque (N·m) Allowable torque kgf·m) Backlash

(mm)

Weight

(kg)A B C D D' E F G J Bending strength Bending strength

PG2-20R1PG2-20R2

2010

20

12

3°42'7°25'

R H1

10 3340.0840.34

44 46 22 13 35 35.54.784.82

0.490.49

0~0.33 0.046

PG2.5-20R1PG2.5-20R2

2010

12

3°52'7°46'

12 3550.1150.46

55 57.5 22 14 36 43.5(8.46)(8.54)

0.860.87

0~0.36 0.066

PG3-20R1PG3-20R2

2010

12

3°55'7°50'

15 5060.1460.57

66 69 28 15 43 52(13.7) (13.8)

1.40 1.41

0~0.38 0.13

＊ The precision grade of this product is equivalent to the value shown in the table.

＊＊ The pressure angle is at 20 degrees for module 2.5.

Specifications



Normalpressure angle 14° 30’ ＊＊Material MC901 Nylon


SeriesG

E F

J

A B D’DC

L

H1K

Bore Keyway Js9




10 12 14 15 16 17 18 19 20 22 25 28 304 × 1.8 5 × 2.3 6 × 2.8 8 × 3.3

M4 M5 M6PG2-20R1 J BORE H1K H1K H1K H1K H1K H1KPG2-20R2 J BORE H1K H1K H1K H1K H1K H1KPG2.5-20R1 JBORE H1K H1K H1K H1K H1K H1K H1KPG2.5-20R2 JBORE H1K H1K H1K H1K H1K H1K H1KPG3-20R1 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1K H1KPG3-20R2 J BORE H1K H1K H1K H1K H1K H1K H1K H1K H1K H1K



Normal module

Number of starts

Lead angle

Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length

LH7 M N O P Q RSUW2-R1

•SUW2-R1J12

•SUW2-R1J14m2

1 3°42'

R

W1W1KW1K

121214

25 31 35 32 14 46SUW2-R2

•SUW2-R2J12

•SUW2-R2J142 7°25'

W1W1KW1K

121214

SUW2.5-R1•SUW2.5-R1J15•SUW2.5-R1J16•SUW2.5-R1J17

m2.5

1 3°52'W1W1KW1KW1K

15151617

30 37 42 45 18 63SUW2.5-R2

•SUW2.5-R2J15•SUW2.5-R2J16•SUW2.5-R2J17

2 7°46'W1W1KW1KW1K

15151617

SUW3-R1•SUW3-R1J17•SUW3-R1J18•SUW3-R1J19•SUW3-R1J20

m3

1 3°55'

W1W1KW1KW1KW1K

1617181920

35 44 50 50 20 70SUW3-R2

•SUW3-R2J17•SUW3-R2J18•SUW3-R2J19•SUW3-R2J20

2 7°50'

W1W1KW1KW1KW1K

1617181920

Keyway Set Screw Weight(kg)

Catalog No.● : J Series (Available-on-request)Width×Depth Size S

―4 x 1.85 x 2.3

―M4M4

―77

0.200.200.18

SUW2-R1

•SUW2-R1J12

•SUW2-R1J14―

4 x 1.85 x 2.3

―M4M4

―77

0.200.200.18

SUW2-R2

•SUW2-R2J12

•SUW2-R2J14―

5 x 2.35 x 2.35 x 2.3

―M4M4M4

―999

0.390.380.370.36


―5 x 2.35 x 2.35 x 2.3

―M4M4M4

―999

0.390.380.370.36


―5 x 2.36 x 2.86 x 2.86 x 2.8

―M4M5M5M5

―10101010

0.630.620.590.580.56


―5 x 2.36 x 2.86 x 2.86 x 2.8

―M4M5M5M5

―10101010

0.630.620.590.580.56


L = Half of hub length (F)

SUW

412

Custom-Made Worm Gears

Custom-made worm gears are available.Custom-made worm gears are available.

Please see Page 16 for more details about custom-made orders.

Klingelnberg Worm Grinding Machine Worm Gear Tooth Contact Machine

High-precision ground gear technology achieves high speed and quiet movement.Excellent tooth contact and appropriate backlash are essential for worm gears. Give KHK's reliable stock worm gears a try.

KHK offers high-precision products.

◆ Production Range

Module 0.5~10

Worm outer diameter: φ 100 mm or less

Wheel outer diameter: φ 600 mm or less

Assembly distance: 350 mm or less

Documents

Worm Gear Pair · 2019-03-28 · Worm Gear Pair. 355. Catalog Number of KHK Stock Gears. The Catalog Number for KHK stock gears is based on the simple formula listed below. Please