TYPELFG / LHG

GEAR-f LEX COUPLINGS

1

l

l

l

l

l

l

Le ss Backlash.

Compa ct Assembly.

Large r Bor e Capacities.

Hig h Powe r T o Weigh t Ratio.

Accommodate s Angula r, Parall el &

Axial Misalignments.

0General ly use d up to 120 C . Ca n b e use d f or highe r temperatures

b y usin g prope r grad e o f greas e or oil.

F E A T U R E S

®

LOADTYPE OF DRIVE

DRIVEN EQUIPMENT Motor orturbine

Reciprocatingengine

Light 2Centrifugal Pumps, Generators - Pulsating Load, Grinders, Hydraulic Pumps, Kilns, Line Shafting, Machine Tools, Oscillating Pumps, Textile Machinery & Woodworking Machinery.

1.5

Uniform 1.5Centrifugal Pumps, Conveyors - Even Loaded, Exciters, Fans and Blowers - Light Duty, Generators - Even Loaded & Mixers - Liquid. 1

Medium 2.5Air compressors - Multi - Cylinder, Ball and Rod Mills, Cranes, Elevators, Hoists, Punch Presses, Reciprocating pumps, Shears, Ship Drives &Welding Generators.

2

Ore Crushers, Bar Stock Shears & Vibrating Conveyors.Extreme 43

HeavyAir Compressors - Single Cylinder, Dredges, Drilling Rigs, Mine Machinery, Rolling Mill Drives & Rubber Mixers. 2.5 3

SERVICE FACTORS

CONSTRUCTION

Full gear type LFG Rathi Flexible Gear Coupling consists of two identical toothed hubs, two identical

flanged sleeves with internal teeth, a gasket, a set of bolts, nuts and lock washers, lube plugs and

two oil / grease retaining seals over the hubs.

1 FORGED HUBS WITH EXTERNAL TEETH

2 FORGED SLEEVES WITH INTERNAL TEETH

3 FLANGE GASKET

4 CLOSE TOLERANCE CONNECTING BOLTS

5 LUBRICATION PLUG

NOMENCLATURE

1

32

54

SELECTION PROCEDURE

1. Select an appropriate SERVICE FACTOR from table given below.

2. Multiply the rated running power by the service factor. This gives DESIGN POWER at

rated speed (rpm). Convert this to design power at 100 rpm. This is used as a

basis for coupling selection.

3. Refer to the rating column and read until the power greater than or equal to the design

power at 100 rpm is found. The size of the gear coupling is given in the

corresponding first column. Check the max. bore capacities. If required bore size is

greater than the max. bore of selected coupling size, then go for higher size to meet

the reqd. bore.

TYPELFG / LHG

2

®

GEAR-f LEX COUPLINGS

COUP.SIZE

LFG-114

LFG-115

LFG-116

LFG-117

LFG-118

LFG-119

6250

8890

11770

15521

710

630

560

500

596591

848591

1123500

1481550

455

520

610

710

900

1000

1100

1250

350

400

450

485

625

720

810

910

755

855

950

1050

423

490

533

558

20

20

20

30

335

386

430

446

720

820

920

1000

2550

3620

4860

6380

172.0

309.0

491.0

753.0

ØA

170

185

220

250

290

320

350

380

430

490

545

590

680

730

780

C

55

70

85

105

110

125

140

155

165

180

200

240

260

280

320

ØD

65

85

105

130

155

175

205

230

250

310

350

400

440

500

540

ØF

110

125

150

175

200

230

260

290

330

390

445

490

555

610

660

M

65

80

105

125

140

155

175

190

205

220

240

280

310

330

370

G

5

5

5

5

10

10

10

10

10

10

10

10

15

15

15

J

49

62

78

96

106

117

134

147

156

171

192

231

242

266

305

B

115

145

175

215

230

260

290

320

340

370

410

490

535

575

655

Wt.

kg.

11

15

25

39

57

85

103

138

210

277

550

710

980

1320

1700

2M.I.(WR )2

kg.m

0.035

0.05

0.12

0.238

0.488

0.75

1.313

2.125

3.75

7.625

14.5

22.0

34.5

72.75

88.25

MAXrpm

63001002

50002492

40004486

33508495

280012982

250019950

210034936

190044864

170055841

140081709

1250109391

1120146236

1000198927

900284455

800345545

200

225

250

250

PB

16

16

30

35

40

45

50

50

70

70

110

120

140

150

200

MAX.

50

60

75

90

110

125

140

160

180

220

260

300

330

370

410

kW AT100rpm

TORQUENm

10.5

26.1

47

89

136

209

366

470

585

856

1146

1532

2084

2980

3620

BORE

LFG-101

LFG-102

LFG-103

LFG-104

LFG-105

LFG-106

LFG-107

LFG-108

LFG-109

LFG-110

LFG-111

LFG-112

LFG-113

l All dimensions are in mm unless otherwise specified. l Wts. & M.I. are with solid hubs.

l Spacer couplings are also available on request.

FEATURES

Standard full flexible gear coupling TYPE LFG accommodates angular & parallel misalignments or a combination of both as well as axial misalignment (end float). Ideal for all horizontal, close coupled applications including fans, overhead cranes, conveyors, steel & paper mill equipments. One or both the hubs can be easily reversed for more than normal shafts separation applications.

TYPELFG

3

FULL FLEXIBLE TYPE LFG

®

GEAR-f LEX COUPLINGS

120 45 50 75 55 3 39.5 93 4.2 0.00757600497 10 355.2LFG-100

GASKET

ØA

'X'

M M

G GAP

CC

J J

B

ØF

ØD

THIS COVERPLATE CONSTRUCTION FORSIZEZ LFG - 105 ONWARDS.

DETAIL 'X'

TECHNICAL DATA

COUP.SIZE

TORQUENm.

ØA C ØD ØF ØF1M G KJ QWt.

kg.

M.I.2(WR )

2kg.m.

MAXrpm

kW AT100rpm

PB MAX.

ØB1 ØB2

BORE

l All dimensions are in mm unless otherwise specified.

l Spacer couplings are also available on request.

l Wts. & M.I. are with solid hubs.

FEATURES

l Standard half flexible gear coupling TYPE LHG cannot accommodate parallel misalignment.

l Used primarily with floating shaft assemblies. Extensively used for cross traverse and long travel line

shaft drives.

TYPELHG

4

HALF FLEXIBLE TYPE LHG

DETAIL 'X'THIS COVERPLATE CONSTRUCTION FOR

SIZES LHG - 105 ONWARDS

l In view of our constant endeavour to improve quality of our products, we reserve the right to alter or change

specifications without prior notice.

l This document is the intellectual property of Rathi Transpower Pvt. Ltd. and subject to copyright.

R-G-01/0-4/02

Rathi Transpower Pvt LtdRathi Chambers, 7, Deccan College Road,Pune 411 006. (INDIA)Phone : 91-20-6696820, 6694826, 6697032Fax : 91-20-6695655E-mail : info@rathigroup.comWebsite : www.rathitranspower.com

Distributor

®

U K A SQUALITY

MANAGEMENTISO 9001008

GEAR-f LEX COUPLINGS

LHG-101

LHG-102

LHG-103

LHG-104

LHG-105

LHG-106

LHG-107

LHG-108

LHG-109

LHG-110

1002

2492

4486

8495

12982

19950

34936

44864

55841

81709

170

185

220

250

290

320

350

380

430

490

55

70

85

105

110

125

140

155

165

180

65

85

105

130

155

175

205

230

250

310

110

125

150

175

200

230

260

290

330

390

85

110

130

160

185

215

240

285

315

370

65

80

105

125

140

155

175

190

205

220

5

5

5

5

10

10

10

10

10

10

115

145

175

215

230

260

290

320

340

370

49

62

78

96

106

117

134

147

156

171

57.5

72.5

87.5

107.5

115

130

145

160

170

185

11

15

20

40

60

80

106

149

170

264

0.0375

0.06

0.1275

0.25

0.5

0.825

1.45

2.375

4.2

8.75

6300

5000

4000

3350

2800

2500

2100

1900

1700

1400

10.5

26.1

47

89

136

209

366

470

585

856

16

16

30

35

40

45

50

50

70

70

60

75

90

110

130

150

170

200

220

260

50

60

75

90

110

125

140

160

180

220

LHG-100 497 120 45 50 75 6555 3 9339.5 46.5 4.2 0.007576005.2 10 4535

ØF

ØD

ØB

1

GASKET G GAP

C

M

J Q

K

ØB

2

ØF

1

ØA

'X'

TECHNICAL DATA