IS 15509 (2004): Double-pitch precision roller chains and … · 2018-11-14 · is 15509:2004 iso 1275:1995 indian standard double-pitch precision roller chains and sprockets for

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IS 15509 (2004): Double-pitch precision roller chains andsprockets for transmission and conveyors [PGD 31: Bolts,Nuts and Fasteners Accessories]

IS 15509:2004ISO 1275:1995

Indian Standard

DOUBLE-PITCH PRECISION ROLLER CHAINS ANDSPROCKETS FOR TRANSMISSION AND !

CONVEYORS I

ICS 21.220.30

0 61S 2004

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

December 2004 Price Group 7

.. ....

Transmission Devices Sectional Committee, MGP 30

NATIONAL FOREWORD

This Indian Standard which is identical with ISO 1275:1995 ‘Double-pitch precision roller chains andsprockets for transmission and conveyors’ issued by the International Organization forStandardization (ISO) was adopted by the Bureau of Indian Standards on the recommendations of theTransmission Devices Sectional Committee and approval of the Medical Instruments, General andProduction 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’.

b) Comma (,) has been used as a decimal marker in the International Standard while in IndianStandards, the current practice is to use a point (.) as the decimal marker.

CROSS REFERENCES

In the adopted standard reference appears to certain International Standards for which IndianStandards also exist. The corresponding Indian Standards which are to be substituted in their placeare listed below along with their degree of equivalence for the editions indicated:

International Standard Corresponding Indian Standard Degree ofEquivalence

ISO 286-2 : 1988 ISO System of IS 919 (Part 2) :1993 ISO system of Identicallimits and fits — Part 2: Tables of limits and fits: Part 2 Tables ofstandard tolerances grades and standard tolerances grades and limitlimit deviations for holes and shafts deviations for holes and shafts (fist

revision)1s0 606 : 1994 Short pitch IS 2403 : 1991 1) Short pitch Identical withtransmission precision roller chains transmission precision roller chains 1s0606:1982and chain wheels and chain wheels (third revision)

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.

‘) Under Revision.

,’. ..

Is 15509:2004ISO 1275:1995

Indian Standard

DOUBLE-PITCH PRECISION ROLLER CHAINS ANDSPROCKETS FOR TRANSMISSION AND

CONVEYORS-

1 Scope

This International Standard specifies requirements fordouble-pitch precision roller chains suitable for themechanical transmission of power and for conveyors,together with those for their associated sprockets. Itcovers dimensions, tolerances, length measurement,proof testing and minimum tensile strengths.

These double-pitch chains have been derived fromsome of the short-pitch transmission precision rollerchains covered by ISO 606 having certain commondimensions but of double the pitch.

The chains are intended for use under less onerousconditions with respect to speed and power trans-mitted than are the base chains from which they arederived.

2 Normative references

The following standards contain provisions which,through reference in this text, constitute provisionsof this International Standard. At the time of publi-

cation, the editions indicated were valid. All standardsare subject to revision, and perties to agreementsbased on this International Standard are encouragedto investigate the possibility of applying the most re-cent edhions of the standards indicated below.Members of IEC and ISO maintain registers of cur-rently valid International Standards.

ISO 286-2:1988, ISO system of limits and fits —Part 2: Tables of standard to/erance grades and limitdeviations for holes and shafts.

ISO 606:1984, Short-pitch transmission precision ro/-Ier chains and chain wheels.

3 Transmission chains

3.1 Nomenclatureof asaamblyandcomponents

The nomenclature of the chain assembly and itscomponent parts is illustrated in figures 1 and 2; thefigures do not define the actual form of the chainplates.

Figure 1 — Chain asaambly

1

IS 15509:2004ISO 1275:1995

Rotloiler

Beoring/#

pin

Bush

m

l!- Outer plate

b) Inner link b) Outer link

c) Detachable connecting link

Ro

Bu

d) Single cranked link

~Roller

–Bush

Inner plate -/

J

L Cranked plate

Bearing pin, riveted

e) Double cranked link

NOTES

1 Thedimensions of theplates arespecified intablel.

2 Fasteners may beofvarious designs, Drawings indcate some examples.

Bearing“pin

Egure 2 — Typesof link

2

,. ...

1

IS 15509:2004ISO 1275:1995

3.2 Designation

Double-pitch transmission precision roller chains shallbe designated by the standard ISO chain numbersgiven in table 1. These chain numbers have been ob-tained by taking the ISO chain number for the basechain, given in ISO 606, and addhg the prefix 2.

EXAMPLE 1

ChainISO 1275-2(MB

3.3 Dimensions

Chains shall conform to the dimensions shown in fig-ure 3 and given in table 1. Maximum and minimumdimensions are specified to ensure interchangeabilityof links produced by different makers of chain. Theyrepresent limits for interchangeability, but are not themanufacturing tolerances.

For the purposes of this International Standard, di-mensions for the double-pitch simplex chains only areshown.

3.4 Tensile testing

3.4.1 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 3.4.2. This minimum tensile strength is nota working force. It is intended primarily as acomparative figure between chains of various con-structions. For application information, the manufac-turers or their published data should be consulted.

3.4.2 A tensile force, not less than that specified intable 1, shall be applied slowly to the ends of a chainlength, containing at least five free pitches, by meansof shackles permitting free movement on both sidesof the chain centreline, in the normal plane of articu-lation.

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

Tests in which failures occur adjacent to the shacklesshall be disregarded.

3.4.3 The tensile test shall be considered a destruc-tive test. Even though a chain may not visibly failwhen subjected to a force equivalent to the minimumtensile strength, it will have been stressed beyond theyield point and will be unfit for service.

3.5 Proof testing

It is recommended that all chains should be prooftested by applying a tensile force equivalent to one-third of the minimum tensile strength given intable 1.

3.6 Length accuracy

Finished chains shall be measured after proof testingbut before lubricating.

The standard length for measurement shall be aminimum of

a) 610 mm for ISO chain numbers 208A to 21OB in-clusive,

b) 1220 mm for ISO chain numbers 212A to 232Binclusive,

and the chain shall terminate with an inner link at eachend.

The chain shall be suppofied throughout its entirelength, and the measuring force given in table 1 shallbe applied.

The measured length shall be the nominal lengthsubject to a tolerance of ‘:15 ‘Yo.

The length accuracy of chains which have to work inparallel shall be within the above limits but matchedby agreement with the manufacturer.

3.7 Marking

The chains shall be marked with the manufacturer’sname or trademark.

It is recommended that the chains should be markedwith the ISO chain number quoted in table 1.

.. . .

IS 15509:2004ISO 1275:1995

t-----i

i-=-l %3+-l-”–-’-12 [j

Cranked link

+--lSection of chain

The chain path depth h, IS the minimum depth of channel through which the assembled chain with small rollers will pass.

The overall width of a chain with a joint fastener is

64+ ~ for riveted pin end and fastener on one side,

b,+ 1,6t+ for headed pin end and fastener on one side;

b4 + 2 @ for fasteners on both sides.

Figure 3 — Chains

I

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4

-.

Ro

llo

rR

olk

ar

wid

thL

sOtw

ae

nB

eari

ng

Chain

wid

thW

tih

Wid

thA

ddit

ional

Pn

atr

dia

ma

tar

dia

rrre

tar

Bush

Pla

teC

rankad

(Srn

all

lll

pin

body

path

bats

vaen

ove

rw

idth

for

Measu

ring

T.n

sila

(Iarg

e)lI

inrs

ar

bore

dapth

link2J

Ove

rd

iam

ete

rdepth

ou

ter

Lw

ari

ng

join

tfo

raa

pla

taa

inn

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ren

gth

pla

tes

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IBo

chain

pd,

d,b

44

h,k

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f%b.

b

num

ber

ma

x.m

ax,

min

.m

ax.

min

.m

m.

ma

x.m

in.

ma

x.m

m.

max

.m

ax.

min

.

mm

NkN

108A

25,4

7,95

15,8

87,

853,

984

t08B

12,3

325

,412

,07

8,51

6,9

15,8

811

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11,3

17,

754,

4517

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53,

912

012

,07

11,8

113

,86,

911

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,43

173,

912

018

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10,1

619

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9,4

5,09

5,12

1583

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31.7

510

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19,0

513

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13,9

79,

6521

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1320

014

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21,8

14,7

38,

413

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13,4

119

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12K

I22

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38,1

11,9

122

,23

12,5

75,

885,

9818

,34

!12B

18,0

838

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912

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22,2

317

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17.8

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7226

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7728

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16,1

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915

,62

15,7

522

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628

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50,8

15,6

a28,5

815,7

57,8

47,9

6500

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24,3

924,1

313

15,88

28,5

822,6

117,02

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48,

2833

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335,

421

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55,6

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813

25,4

525

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5,4

500

60

!20A

63,5

19,0

539

,67

18,8

9,54

!206

63,5

9,56

30,4

830

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1619

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39,6

727

,46

19,6

627

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41,1

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978

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26,6

826

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1666

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443

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178

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76,2

22,2

344

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211

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4876

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18,1

44,4

525

,435

,46

35,5

950

,86,

614

,83

111

014

,68

33,7

333

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4,6

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37,9

238

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53,4

6,6

1110

180

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88,9

27,8

4—

30,9

915

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!32B

37,4

610

1,6

37,0

821

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46,7

165

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430

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17,8

117

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1510

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45,5

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....

IS 15509:2004ISO 1275:1995

4 Conveyor chains

4.1 General

Except where otherwise stated, the shapes, dimen-sions and test details for the chain and sprockets shallconform to clauses 3 and 5, respectively, substitutingreference to table 2 in place of table 1 where appro-priate.

It is usual for chains used for conveyor purposes tohave straight-edged (not waisted) side plates. Ad-

ditionally, an alternative large roller of diameter d, maybe adopted. These features are ,illustrated in figure 4.

4.2 Nomenclature

The nomenclature of figure 2 is also applicable toconveyor chains. Figures 2 and 4 do not define theactual form of the chain plates.

Figure 4 — Conveyorchainwith largerollers

4.3 Designation

Double-pitch precision roller chains suitable for con-veyor purposes are designated additionally with theprefix C when the straight-edged chain plates(figure 4) are used, and with a suffix L when the al-ternative large size roller (d7) k adopted. Whennecessary for the purpose of distinguishing betweenthe chain roller sizes adopted, an optional suffix S maybe applied to chains with the small roller.

4.4 Dimensions

When the large roller size is adopted, dimension d,shall be replaced by d, in wheel formulae. Dimensionsshall be in accordance with table 2.

4.5 Length accuracy

The length of plain chain shall be the nominal length‘0”5 ‘%0.subject to the tolerance o

The length of the chain with attachments shall be thenominal length subject to the tolerance ~$~~ ?10.

4.6 Marking

The chains shall be marked with the manufacturer’sname or trademark. It is recommended that thechains should be marked with the ISO chain numberquoted in table 2.

4.7 Attachments

4.7.1 General

Except when otherwise stated, the dimensions andtest details for the chain with attachments shall con-form to clause 3.

4.7.2 Designation

Two types of attachment are given, with the commondimensional basis .as given in table 3; their designationand distinguishing features are as follows:

K1: with one attachment hole centrally located ineach platform,

K2: with two attachment holes longitudinally lo-cated,

as shown in figure 5.

4.7.3 Dimensions

Attachments shall conform to the dimensions givenin table 3.

4.7.4 Manufacture

The actual form of the K attachment plates is left tothe discretion of the manufacturer, but the attach-ments are normally of integral construction, wherebythe chain plates are extended and bent over to makethe platform, as shown in figure 5.

The length of the attachment plate is also left to thediscretion of the manufacturer, but it should be suf-ficient to accommodate the attachment holeslongitudinally in the case of type K2, and not interferewith the working of the adjoining links. A commonlength is normally adopted for both types KI and K2.

4.7.5 Marking

The marking shall be the same as would be shownon the chain plates replaced by an integral con-struction attachment.

6

.. .

IS 15509:2004ISO 1275:1995

Table2 — PrinciDal dimensions. measurhw forces and tensile strenaths

I I IIEI

I 1 1.:1

I I lit.—

m

7

—. . . ., . _,____ 14

1

IS 15509:2004ISO 1275:1995

Table 3 — Dimensions of K attachment plates (see figure 5)Dimensions in millimetre

ISO chain numberl) Platform height TransversediatanseHolediametar

Longitudinal&tancabetweenhola cerrtree betweenhole centrea

k f 4 g* 0,4 * 0,5

min. * 0,2

C 208A 9,1 25,4 3,3 9,5C 208B 9,1 25,4 4,3 12,7

C 21OA 11,1 31,8 5,1 11,9C 21OB 11,1 31,8 5,1 15,9

C 212A 1487 42,9 5,1 14,3c 212A-H 14,7 42,9 5,1 14,3C 212B 14,7 38,1 6,6 19,1

C 218A 19,1 55,6 6,6 19,1C 216A-H 19,1 55,6 6,6 19,1C 216B 19,1 50,8 6,6 25,4

C 220A 23,4 66,6 8,4 23,8C 220A-H 23,4 66,6 8,4 23,8C 220B 23,4 63,5 8,4 31,8

C 224A 27,8 79,3 10,5 28,6C 224A-H 27,8 79,3

C 224B

10,5 28,627,8 76,2 10,5 36,1

C 232A-H 36,5 104,7 13,1 38,1

1) Heavy or higher-strength chains are designated with the suffix H,

.-

.

See the note=

F-H---l I-+”+-)--i–”&}-——;—l—”+—

‘J-1--l U4-I-+-J-+--W’%4-----

NOTE — K2 attachment plates each have two attachment holes, K1 plates are similar except that they have one hole, locatedcentrally (see 4.7.2).

Figure 5 — K attachment plates

IS 15509:2004ISO 1275:1995

5 Sprockets 5.2.2 Diamatral dimensions

5.1 Nomenclature 5.2.2.1 Pitch-drde diameter, d

The nomenclature for basic chain dimensions ond= p

sin 18~which all sprocket data are based is given in figure 3 z

and tables 1 and 2.Annex A gives the pitch-circle diameter for unit pitchas a function of the number of teeth.

5.2 Diametral dimensions and tooth shape

5.2.1 Nomenclature

Nomenclature for diametral dimensions and toothshape is given in figure 6.

5.2.2.2 Measuring pin diameter, ~

&=dl

5.2.2.3 Root diameter, ~

(+=d-dl

subject to the tolerance limits given in table 4.

b, =

b, =

b, =

d=

4=

4=d, =

d, =

ha =

h=

tooth side relief

tooth width

minimum width between inner plates

pitch-circle diameter

tip diameter

root diameter

absolute maximum shroud diameter

maximum roller diameter

height of tooth above pitch polygon

maximum plate depth

/

P .

r. =

‘e =

r, =

rx =

z .

Z1 =

a .

l-%

r

chordal pitch, equal to chain pitch

shroud fillet radius

tooth flank radius

roller seating radiuS

tooth side radius

number of teeth corresponding to the number of links

that can be wrapped around the sprocket

number of teeth for double-cut sprockets = 2Z

rollerseatingangle

Figure 6 — Diametral dimensions and tooth shape

9

.. ...

IS 15509:2004

ISO 1275:1995

Table 4 — Tolerance limits for root diameter

Root diameter, 4 upper Lowardeviation deviation

mm

4<127 0 0,25 mm

127<4 <250 0 0,3 mm

4>250 0 hill)

I 1) See ISO 288-2.

5.2.2.4 Measurement over pins (Seefi9ure7)

For an even rwmber of teeth:

MR = d + dR min.

For an odd number of teeth and single-cut sprockets:

&fR= d COS90”~ + dR min.

For an odd number of teeth and double-cut sprockets:

oMR=dcos~ + dfl min.

The measurement over pins of sprockets with aneven number of teeth shall be carried out over pinsinserted in opposite tooth gaps.

The measurement over pins of sprockets with an oddnumber of teeth shall be carried out over pins in thetooth gaps most nearly opposite.

The limits of tolerance for measurement over pins areidentical to those for the corresponding root diam-eters.

NOTE 1 Sprockets for double-pitch chains may be pro-vided with either one set of teeth having a number of teethequal to z or with two sets of teeth, the locationof the toothspaces of the second set being midway between those ofthe first. In this case, the total number of teeth of thewheels will be z, = 22.

In the case of a single set of teeth, z will be an integer. Inthe case of double-cut sprockets, z, will be an integer, butz will be fractional if z, is an odd number.

Short-pitchbase chains should not be used with double-cutsprockets made for extended-pitch chains and viceversa

d=

4=

4=

MR =

P=

<f? / I---J4‘vEven number of teeth Odd number of teeth

pitch-circle diameter

root diameter

measuring pin diameter

measurement over pins

chordal pitch, equal to chain pitch

Figure 7 — Measuring pin size

Single- and double-cut teethF*1 tine = zOash-dotted line= 22

10

.. ...

Is 1550s :2004ISO 1275:1995

5.2.2.5 Tip diameter

d, max. = d + 0,625p – d,

( 04

)d.min. =d+p 0,5-~ –d,

It should be noted that ~ max. and ~ min. can beapplied arbitrarily both to the minimum and maximumtooth gap forms, subject to the limitations imposedby the cutter on the maximum diameter.

To facilitate the construction of the tooth gap form toa large scale on a drawing board, the tooth heightabove the pitch polygon can be obtained from thefollowing formulae:

( )~ max. =p 0,3125 + ~ - 0,5dT

( )~ min. =p 0,25 + ~ - 0,5d1

Note that ~ max. is related to ~ max. and & min. tod, min.

5.2.3 Tooth gapform

The actual tooth gap form which is provided by cuttingor by an equivalent method shall have tooth flanks ofa form lying within the minimum and maximum flankradii and blending smoothly with the roller seatingcurve subtending the respective angles.

5.2.3.1 Minimum form

r~max. = 0,12dl(z + 2)

r{ min. = 0,505d1

5.2.3.2 Maximum form

r, min. = 0,008d1 (Z2 + 180)

q max. = 0,505d1 + 0,069 ~

~min.=12~-*

5.2.3.3 Tooth width

4 = 0,95b1: hl~)

NOTE 2 4 = 0,931q:h14 may be used by agreement be-tween user and manufacturer.

5.2.3.4 Tooth aide relief

, mm = 0,065pb

5.2.3.5 Absolute maximum shroud diameter

~=pcot J+ 1,05~ -1- 2ra mm

5.2.3.6 Tooth aide radius

‘x nom= 015P .—

5.3 Radialrun-out

Radial run-out, measured on one complete turn of thesprocket, with reference to the bore and root diame-ter, shall not exceed a total indicator reading greaterthan the larger of the two following values:

0,000 ~ + 0,08 mm, or 0,15 mm, up to a maxi-mum of 0,76 mm.

5.4 Axialrun-out (wobble)

Axial run-out, measured on one complete turn of thesprocket with reference to the bore and the flat partof the side face of the teeth, shall not exceed a totalindicator reading of

0,000 ~ + 0,08 mm, up to a maximum of1,14 mm.

For fabricated (welded) sprockets, a minimum of0,25 mm may be accepted if the above formula givessmaller values.

5.5 Pfichacouracyof sprocketteeth

Pitch accuracy of sprocket teeth is important andchain manufacturers should be consulted for details.

5.6 Preferredrangeof teeth

This International Standard primarily applies to a rangeof teeth from 5 to 75 inclusive (with interrndatenumbers of teeth 5 1/2 to 74 1/2 inclusive).

The preferred range of numbers of teeth is 7, 9, 10,11, 13, 19, 27, 38 and 57.

●) See ISO 266-2.

11

.,,

I.,,

Is 15509:2004ISO 1275:1995

5.7 Bore tolerance a) manufacturer’s name or trademark;

Unless otherwise agreed between the manufacturer b) number of teeth;and the purchaser, bore tolerances shall be H&l.

c) chain designation (the ISO chain number or

5.8 Marking manufacturer’sequivalent).

It is recommended that sprockets should be markedwith the following:

●) See ISO 288-2.

12

Is 15509:2004ISO 1275:1995

Annex A(normative)

Ptich-circlediameters

Table A. 1 gives the correct pitch-circle diameters for sprockets to suit a chain of unit pitch. The pitch-circle diam-eters for s-prockets to suit a chain of any other pitch are directly proportional to the pitch of the chain.

Table A.1 — Pfich-circlediematers

Pfich-circle Pitch-circlo Pitch-circloNumber of diameter,d, Number of

Pnch.circlediemeter,d, Number of diemetef,d, Number of

teeth for unitdiemeter,d,

teeth for unit teeth for unit teeth for unitpitchl) Pitchl) -’) ml)

z z z z

5 1,7013 23 7,3439 41 13,0635 59 la,7e92

5112 1,6496 23112 7,5026 41112 13,2225 59112 18,e4a 2

6 2 24 7,6613 42 13,3615 60 19,1073

6112 2,1519 24112 7,82 42112 13,5405 60112 19,2665

7 2,3048 25 7,9787 43 13,6885 61 19,4255

7112 2,4566 25112 8,1375 43112 13,8565 611126 2,6131 26

19,58478,2862 u 14,0176 62 19,7437

8 1/2 2,7662 267!2 a,455 44 1/2 14,1765 62112 19,8029

9 2,9238 27 8,613a 45 14,3356 53 20,0619

9712 3,079e 27 fi2 8,7726 45112 14,4846 63 1/2 20,221

10 3,2361 26 a,9314 46 14,6537 54 20,38

10112 3,3927 28 %12 9,0902 46 1/2 140a127 64112 20,5393

11 3,5494 28 9,2491 47 14,9717 65 20,69e 211 IJ2 3,7065 26112 9,408 47112 15,130a 65112 20,857512 3,8637 30 9,5666 46 15,2688 66 21,016412 IJ2 4,0211 30 f12 9,7256 46112 15,446 a 55112 21,1757

13 4,1786 31 9,68-45 48 15,6079 67 21,334613112 4,3362 31112 10,0434 48112 15,7669 57 1/2 21,493914 4,484 32 10,2023 56 15,926 66 21,652814112 4,6518 32112 10,3612 56712 16,085 56112 21,8121

15 4,8097 33 10,5201 51 16,2441 68 21,97115112 4,8677 33112 10,679 51112 16,4031 68112 22,130316 5,1258 34 10,638 52 16,5622 7016112

22,26825,264 34112 10,9869 52112 16,7212 701!2 22,4485

17 5,4422 35 11,1558 53 16,8603 7117 1/2

22,60745,6005 35112 11,3148 53112 17,0393 71112

1822,7667

5.7668 36 11,4737 54 17,1884 72 22,925618 1/2 5,9171 36112 11,8327 54112 17,3575 72112 23,0649

19 6,0755 37 11,7916 65 17,5166 7319112 6,234

23,243 a37 1/2 11,9506 65 w 17,6756 73112

2623,4031

6,3825 36 12,1086 68 17,6347 7420112 8,5509

23,58236112 12,2685 56112 17,8838 74112 23,7213

21 6,7085 38 12,4275 67 18,1529 7521 1/2 6,6681

23,8802391!2 12,5865 57 1/2

2216,3119

7,0266 40 12,7455 56 18,47122712 7,1653 40712 12,8045 58 1/2 18,6301

. .1) TtrIs IS sometimes referred to as “unit pitch-circle diameter”.

13

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,

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