Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.
इंटरनेट मानक
“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”
“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru
“Step Out From the Old to the New”
“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan
“The Right to Information, The Right to Live”
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
“Invent a New India Using Knowledge”
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
BUREAU OF INDIAN STANDARDS
Headquarters :
Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002 Telegrams: ManaksansthaTelephones :23230131,23233375,2323 9402 (Common to all offices)
Regional Ofices : Telephone
Central :
Eastern :
Northern :
Southern :
Western :
Manak Bhavan, 9 Bahadur Shah Zafar Marg
{
23237617NEW DELHI 110002 23233841
1/14 C.I.T. Scheme Vll M, V. 1.P. Road, Kankurgachi
{
23378499,23378561KOLKATA 700054 23378626,23379120
SCO 335-336, Sector 34-A, CHANDIGARH 160022
{
603843609285
C.I.T. Campus, IV Cross Road, CHENNAI 600113
{
22541216,2254144222542519,22542315
Manakalaya, E9 MlDC, Marol, Andheri (East) 128329295,28327858MUMBAI 400093 128327891,28327892
Branches : AHMEDABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE. FARIDABAD.GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW. NAGPUR.NALAGARH. PATNA. PUNE. RAJKOT. THIRUVANANTHAPURAM. VISAKHAPATNAM.
Printed at Prabhat Offset Press, NW Dt#hi-2