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है”ह”ह

IS 15510 (2004): Heavy-Duty Cranked-Link TransmissionChains [PGD 31: Bolts, Nuts and Fasteners Accessories]

IS 15510:2004ISO 3512:1992

Indian Standard

HEAVY-DUTY CRANKED-LINK TRANSMISSIONCHAINS

ICS 21.220.30

@ BIS 2004

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002A/gust 2004 Price Group 6

. = .-g

Transmission Devices Sectional Committee, BP 30

NATIONAL FOREWORD

This Indian Standard which is identical with ISO 3512: 1992 ‘Heavy-duty cranked-link transmissionchains’ issued by the International Organization for Standardization (ISO) was adopted by the Bureauof Indian Standards on the recommendations of the Transmission Devices Sectional Committee andapproval of the Basic and Production Engineering Division Council.

The text of the ISO Standard has been approved as suitable for publication as an Indian Standardwithout deviations. Certain conventions are, however, not identical to those used’ in Indian Standards.Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should beread as ‘Indian Standard’; and

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practiceis to use a point (.) as the decimal marker.

For the purpose of deciding whether a particular requirement of this standard is complied with, thefinal value, observed or calculated, expressing the result of a test or analysis, shall be rounded off inaccordance with IS 2 : 1960 ‘Rules for rounding off numerical values (revised)’. The number ofsignificant places retained in the rounded off value should be the same as that of the specified valuein this standard.

II !,,

IS 15510:2004

ISO 3512:1992

Indian Standard

HEAVY-DUTY CRANKED-LINK TRANSMISSIONCHAINS

1 Scope

This International Standard specifies dimensions,tolerances, measuring forces and minimum tensilestrengths, together with the tooth gap forms and rimprofiles of the associated chain wheels, forcranked-link or offset sidebar roller chains suitablefor the mechanical transmission of power and alliedapplications under onerous conditions.

The dimensions of chains specified ensure completeinterchangeability of any given size and provideinterchangeability of individual links of the chain forrepair purposes.

NOTE 1 Since these chains have been derived from an“inch” series of chains, their original dimensions aregiven in annex B.

2 Chains

2.1 Nomenclature of assemblies andcomponents

The nomenclature of chain assemblies and theircomponent parts are illustrated in figures 1 and 2;the figures do not define the actual form of the chainplates. The symbols for chains are given in table 1and are shown in figure 3.

2.2 Designation

Heavy-duty cranked-link roller chains shall be des-ignated by the standard ISO chain number given in

table 1: the first two digits express the nominal pitchin eighths of an inch, while the second (last) twodigits express the basic bearing pin diameter insixteenths of an inch.

2.3 Dimensions

Chains shall conform to the dimensions shown intigure3 and given in table 1. Maximum and minimumdimensions are specified to ensure interchangeabil-ity of links as produced by different makers of chain.They represent limits for interchangeability, but arenot the manufacturing tolerances.

Pitch, p, is a theoretical reference dimension usedin calculating strand lengths and chain wheel di-mensions; it is not intended for inspection of indi-vidual links.

2.4 Tensile testing

2.4.1 The minimum tensile strength is that valuewhich shall be exceeded when a tensile force is ap-plied to a sample which is tested to destruction asdefined in 2.4.2. This minimum tensile strength is nota working force. It is intended primarily as a com-parative figure between chains of various con-structions. For application information, themanufacturers or their published data should beconsulted.

IS 15510:2004

ISO 3512:1992

2.4.2 A tensile force, not less than the tensilestrength specified intablel, shall be applied slowlyto the ends of a chain length, containing at leastthree free pitches, by means of shackles permittingfree movement on both sides of the chain centreline,in the normal plane of articulation.

Faiiure shall be considered to have occurred at thefirst point where increasing extension is no longeraccompanied by increasing ioad; i.e. the summit ofthe force extension diagram.

Tests in which faiiures occur adjacent to theshackles shaii be disregarded.

2.4.3 The tensiie test shali be considered a de-structive test. Even though a chain may not visiblyfaii when subjected to a force equivalent to theminimum tensiie strength, it wili have been stressedbeyond the yield point and will be unfit for service.

2.5 Length accuracy

Finished chains shail be measured either dry or af-ter only light lubrication.

The standard nominai iength for measurement shallbe that nearest 3050 mm.

The chain shali be supported throughout its entireiength and the measuring force specified in tabie 1shail be appiied.

The measured length shaii be the nominai iength‘:32 %.

The length accuracy of chains which have to work in.paraiiel shail be within the above iimits but matchedby agreement with the manufacturer.

2.6 Working clearances

The form of the line of cranking or offset, across thewidth of each link, may be curved or straight (seeiower part of figure 3).

If straight, the distance from the pitch point shali be/, or 12.

if curved, this distance shall be Is or ~. Radii Is and& shali be sufficient to aliow clearance over the ad-jacent piate nose contained by the clearance radii/3 and 1~ during chain articulation round a seven-tooth wheei.

Side piates may be extended, provided that the ex-tension is within a 30° inciuded angle with respectto the sidebar, as indicated in figure 3. The chain linkconstruction shall always allow for this extension tobe adopted.

2.7 Marking

The chains shall be marked with the foliowing:

a) manufacturer’s name or trade mark,

b) ISO chain number quoted in tabie 1.

--’1

2

q

IS 15510:2004ISO 3512:1992

Figure 1 – Cranked-link chain assembly

/-iFaGmsrISchslnatld

Bearingphl1

Figure 2 – Typicai cranked-iink components

IS 15510:2004

ISO 3512:1992

1~

1I

I .—

Offset constructionradtussdcrank

I .. —. -—. .—. .—-. I

‘r “ -‘7’ 1-- --—

! >, /f”- “\{ -)’)’+- __’,P:.:;h-y ]j .‘L% ‘~~8‘.-- --

1’1 I

Offset constructionstrat~t crank

{1

‘-”--m” -------

Figure 3 – Symbols for dimensions (see table 1)

T PitchK40S5nh

‘l--PWidth

ketweenplataa atiranr and

b, 2)

mm.

width widthBearing ~A Ch8in

WidthRokler Plato C?mtk war link

wer pin

dkaeterpin body ~m path

MtwmCluranco

diunotwhatoning

depth ** dimermionsl)at innu platca ●

md OutU ●dto

c9tttr9iim

4 4 4 h? % 4 12 % b? b4

men. nux mm. mm. mu mm. min. max mm. max.I

mm

WidthWU pinh-ad to

cmtmlim

%max.

2010 e3,5 31.75 2e,l 15,9 15,% 44,3 47,8 22,4 23.9 S4,38 54,51 47,0 42,$ 7,9

S212 77,9 4j ,3a 2a,6 19,!36 !9,13 81,1 60,5 2a,9 2%5 59,13 59,26 55,6 47,8 9,?

2a*4 3%s U,43 ze,l 22,23 22,33 61,1 00,5 31,8 23,3 e4,01 64,14 62 5s,8 12,7

3a15 103,4s 4S,24 48,3 23,85 23,42 44,t 63,5 33,3 3e.1 78,28 78,4q 71.4 23s 14,2

3am 114,3 57,15 52,3 27,97 28,07 20 7S,2 34,6 41,2 81,44 81,54 ?6.2 42 14,2

b 127 as,s 23,9 31,78 31,ka k3 91#9 47,8 32,3 102,33 103,s1 UO.4 77,7 15,7

- 122,4 72,2 73,2 3a,f3 3e,2e 103,7 104,8 %,6 5a,7 115,03 115.21 ego 38.9 19

- 177,8 ee,s 82,8 44,4s 4,22 134,6 133,4 ke a3,fl 127,79 127,91 114,3 102,6 22,4

*OTE – C3veraliwidth of the connecting link= b4 - ~. In the case of a fastener on both sides, overall width = 2b4

Moauring Tonoilo*C* strm)eth

I ““

2200 i sw

*

*

1) /3 m -{I mirt.; /4 mex = /2 min..

2) Minimum width= O,Sk,.

Cr3

IS 15510:20041S0 3512:1992

3 Chain wheels

3.1 Nomenclature

The nomenclature for basic chain dimensions onwhich all the following wheel data are based is givenin table 1. Chain wheel nomenclature is covered un-der the respective headings.

3.2 Dlametral dimensions of wheel rim

3.2.1 Nomenclature

See tigure 4.

1

s

P

Evennumber OddnumberOf teeth Of teeth

- chordalpitch,equaltoctwlnpitchdR = ~!!dng-pin dfad@f’z = numberof teethd = pitch-circle dtameterdr = root dtametcrt’fR - =!!~@~t oV@rpl~

Figure 4 – Chain wheel diametral dimensions

3.2.2 Dimensions

3.2.2.1 Pttch-circle diameter, d

d= psin 180°

z

Annex A gives the pitch-circle diameter for unitpitch as a function of the number of teeth.

3,2,2.2 Measuring-pin diameter, dR

dR= d, (see figure 5)

subject to tolerance limits of ‘~1 mm.

3.2.2.3 Root diameter, ~

~=d–d,

subject to the tolerance limits given in tables 2 and3.

Table 2 – Machined teethDimensions In milllmetres

Root diametsr Tolerance

4

IS 15510:2004ISO 3512:1992

3.3 Wheel tooth gap forms

3.3.1 Nomenclature

See figure 5.

3.3.2 Dimensions

The actual troth gap form which is provided by cut-ting or by an equivalent method shall have trothflanks of a form defined by the tooth flank (topping)radius, the working face length and roller seatingcurve, with a smooth blending from one portion tothe next, taking into account the criteria set out in3.3.2.1 to 3.3.2.6.

3.3.2.1 Working face

This is the functional part of the tooth form having alength equal to O,OIPZ, unless reduced by the limi-tation imposed by having all lines perpendicular tothe tooth form pass inside the adjacent pitch pointon the pitch circle.

tP

The working face may be straight or convex.

NOTE 2 The above relationship allows for a chain pitchelongation of approximately 6 0/0where z

-r?

IS 15510:2004

ISO 3512:1992

3.3.2.4 Pitch Iine clearance, s

For wheels of non-machined form or in a dirty en-vironment:

S=o,lp

For wheels of machined form or in a clean environ-ment:

s = o,oo3p

3.3.2.5 Roller seating radius, r,

d,r, max. = —

2

3.3.2.6 Tooth flank (topping) radius, re

Pre=—2

3.4 Wheel rim profile

3.4.1 Nomenclature

See figure 6.

1-b,

-1

b, . toothwlhb, = tooth-side rellctbh = tooth-side rellat depthd~ = maximumclearance dfameterra - maxhmxnshroudtlllat radlue

Ftgure 6 – Wheel rim profile

3.4.2 Dimensions

h, max. = 0,9bt

b~ % 0,24

~ z 0,5d1

3.5 Radial run-out

The radial run-out, measured on one revolution,tween the bore and the root diameter shall notteed the values indicated below.

For non-machined teeth: 0,0054 or 1,5 mm.

be-ex-

The larger of the two values shall be taken, but inno case shall the radial run-out exceed 10 mm.

For machined teeth: 0,001~ or 0,2 mm.

The larger of the two values shall be taken, but inno case shall the radial run-out exceed 5 mm.

3.6 Axial run-out

Axial run-out, measured with reference to the boreand the flat part of the side face of the teeth, shallnot exceed the value for total indicator reading asstipulated for radial run-out in 3.5.

3.7 Number of teeth

This International Standard primarily applies to anumber of teeth from 7 to 100 inclusive.

3.8 Marking

Wheels shall be marked with the following:

a) manufacturer’s nahe or trade mark

b) number of teeth;

c) chain designation (ISO chain number and/ormanufacturer’s equivalent).

IS 15510:2004ISO 3512:1992

Annex A(normative)

Pitch-circle diameters

Table A.1 gives correct pitch-circle diameters for pitch are directly proportional to the pitch of thewheels to suit a chain of unit pitch. The pitch-circle chain.diameters for wheels to suit a chain of anv other

NOTE3 Theiast digit isrounded down toavoid the riskof oversize root diamiters.

Table Al – Pftch-clrcle diametera

Number of Pitch-circleTooth

Number of Pitch-circleTooth

teeth diameterPres8urs angle thickness

teeth diemeterPre8mIra angle thicknecs

●ngled

●gle9

for unit pitchl)# d

degreese

degree$ fOr unit pltchl)P

degrees degrees7 mm *2” ~ z mm +2” =

7 2,304 !0 25 54 17,166 27 55s 2,613 11 2%9

55 17,516 27 55

2,923 12 28 5s40

17,634 27 55

3,236 13 30 5711

18,152 27 553,549 14 31 56

121s,471 27 55

3,863 15 33 59 18,76213

27 554,178 16 35 so

1419,107 27 55

4,494 17 36 SI15

19,425 27 554,s09 18 36 02 19,743 27

4655

5,125 19 40 63 20,061 2717

55

5,442 m 42 6416

m,360 27 55

5,75s m 42 S519

20,668 27 55

6,075 21 44 S620

21,016 27 55

6,392 21 44 6721

21,334 27 55

6,709 22 46 66 21,652 27

22

55

7,026 22 46 S9 21,971 2723

55

7,343 22 46 70 22,2S9 2724

55

7,661 23 47 74 22,607 26 56

25 7,976 23 47 72 22,925 2626

56

8,296 23 47 73 23,243 2627

58

8,6!3 23 47 74 23,562 2628

56

6,93 I 24 49 7s 23,660 2629

56

9,249 24 49 76 24,196 2630

56

9,566 24 49 7731

24,516 26 56

9,664 24 49 76 24.934 2832

56

10,202 24 49 79 25,153 2633

56

10,520 25 51 so 25.47! 2634

56f0,637 25 51 61 25,789 26

35

56

!1,155 25 51 62 26,107 28

38

56

11,473 25 51 S3 26,426 26

37

56

11,791 25 5! 84 26,744 26

38

56

12,106 25 51 85 27,062 26

39

56

12,427 25 51 S6 27,360 26 56

40 12,745 25 51 67 27,669 m

41

56

13,063 26 53 68 26,017 26

42

56

13,361 26 53 89 28,335 2643

56

13,699 26 53 90 26,653 2644

56

14,0!7 26 53 91 2s,971 2645

56

14,335 26 53 92 26,290 26

46

56

14,653 26 53 83 29,608 2s 56

47 14,971 26 53 04 29,926 2640

56

15,269 26 53 95 30,244 2649

56

15,607 26 53 96 30,563 26

50

56

15,926 26 53 6751

30,S81 26 56

16,244 26 53 96 31,199 2!l

52 16,562 26 53 69 3!,519 23 :

53 16,680 27 55 100 31,836 29 58

1) This is sometimes referred to as “unit pitch-circle diameter”.

IS 15510:2004

ISO 3512:1992

Annex B(informative)

Original values

Table B.1 records for reference purposes the original dimensions, etc., from which the values of this inter-national Standard have been derived. It relates to table 1 of this International Standard.

10

IS 15510:2004ISO 3512:1992

Table B.1 – Chain dimensions, measuring forces and minimum tensile strengths, In Imperfal unfts

I

Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goodsand attending to connected matters in the country.

Copyright

BIS has the copyright of all its publications. No part of these publications may be reproduced in anyform without the prior permission in writing of BIS. This does not preclude the free use, in the course ofimplementing the standard, of necessary details, such as symbols and sizes, type or grade designa-tions. Enquiries relating to copyright be addressed to the Director (Publications), BIS.

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards arealso reviewed periodically; a standard along with amendments is reaffhmed when such review indi-cates that no changes are needed; if the review indicates that changes are needed, it is taken up forrevision. Users of Indian Standards should ascertain that they are in possession of the latest amend-ments or edition by referring to the latest issue of ‘BIS Catalogue’ and ‘Standards: Monthly Additions’.

This Indian Standard has been developed from Doe: No. BP 30 (0287).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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