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1、BRITISH STANDARD BS ISO 1275:2006 Double-pitch precision roller chains, attachments and associated chain sprockets for transmission and conveyors ICS 21.220.30; 53.040.20 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:31:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 1275:2006 Thi
2、s British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2006 BSI 2006 ISBN 0 580 49024 6 National foreword This British Standard reproduces verbatim ISO 1275:2006 and implements it as the UK national standard. It supersedes BS ISO 1275:1995 whic
3、h is withdrawn. The UK participation in its preparation was entrusted to Technical Committee MCE/1, Chains and chain sprockets for power transmission and conveyors, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cro
4、ss-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Sta
5、ndards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to th
6、e responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front
7、cover, the ISO title page, pages ii to v, a blank page, pages 1 to 21 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06
8、:31:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 1275:2006(E) INTERNATIONAL STANDARD ISO 1275 Fourth edition 2006-07-01 Double-pitch precision roller chains, attachments and associated chain sprockets for transmission and conveyors Chanes de prcision rouleaux pas double, plaque
9、s-attaches et pignons dents correspondants pour transmission et manutention BS ISO 1275:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:31:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:31:31 GMT+00:00 2006, Uncontrolled Copy
10、, (c) BSI iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 1 3 Transmission chains 1 3.1 Assembly and component nomenclature 1 3.2 Designation . 4 3.3 Dimensions 4 3.4 Tensile testing. 4 3.5 Preloading . 4 3.6 Length validation 6 3.7 Marking 6 4 Conveyor chains. 8 4.1
11、 General. 8 4.2 Nomenclature 8 4.3 Designation . 8 4.4 Dimensions 8 4.5 Length validation 8 4.6 Marking 8 4.7 Attachments 10 5 Sprockets. 15 5.1 Nomenclature 15 5.2 Diametral dimensions and tooth shape 15 5.3 Radial run-out 19 5.4 Axial run-out (wobble) 19 5.5 Pitch accuracy of sprocket teeth 19 5.6
12、 Bore tolerance. 20 5.7 Marking 20 Annex A (normative) Pitch circle diameters 21 BS ISO 1275:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:31:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv Foreword ISO (the International Organization for Standardization) is a worldwide federation
13、of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. I
14、nternational organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with
15、 the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approva
16、l by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 1275 was prepared by Technical Committee
17、ISO/TC 100, Chains and chain sprockets for power transmission and conveyors. This fourth edition cancels and replaces the third edition (ISO 1275:1995), which has been technically revised. BS ISO 1275:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:31:31 GMT+00:00 2006, Uncontrolled C
18、opy, (c) BSI v Introduction This International Standard has been established to cover a range of chains used in the majority of countries in the world by unifying dimensions, strengths and other data from current national standards. The principal feature of these chains is their derivation from the
19、ISO 606 series by using the standard round parts in links that are double the standard pitch. Chains have been adopted from the ANSI, BS and DIN double-pitch series to form a range from 25,4 mm to 101,6 mm pitch. Versions of chains are included with normal and with thicker plate materials, with the
20、alternatives of smaller or larger rollers, as well as a range of attachments and sprockets. The dimensions of the chains provide for complete interchangeability of individual links, and the sprocket dimensions allow complete interchangeability of chains of the same pitch and the same chain designati
21、on (either A or B series). BS ISO 1275:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:31:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:31:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 1 Double-pitch precision roller chai
22、ns, attachments and associated chain sprockets for transmission and conveyors 1 Scope This International Standard specifies requirements for double-pitch precision roller chains suitable for the mechanical transmission of power and for conveyors, together with those for their associated sprockets. I
23、t covers dimensions, tolerances, length measurement, preloading and minimum tensile strengths. These double-pitch chains have been derived from some of the short-pitch transmission precision roller chains covered by ISO 606 having certain common dimensions but of double the pitch. The chains are int
24、ended for use under less onerous conditions with respect to speed and power transmitted than are the base chains from which they are derived. This International Standard primarily applies to sprockets with 5 to 75 teeth inclusive (with intermediate numbers of teeth 5 1/2 to 74 1/2 inclusive). The pr
25、eferred numbers of teeth are 7, 9, 10, 11, 13, 19, 27, 38 and 57. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced docum
26、ent (including any amendments) applies. ISO 286-2, ISO system of limits and fits Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts ISO 606, Short-pitch transmission precision roller and bush chains, attachments and associated chain sprockets 3 Transmission chains
27、3.1 Assembly and component nomenclature The nomenclature of the chain assemblies and their component parts is illustrated in Figures 1 and 2. NOTE The figures do not define the actual form of the chain plates. Figure 1 Chain assembly BS ISO 1275:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun N
28、ov 26 06:31:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 Key 1 inner plate 2 roller 3 bush Key 1 outer plate 2 pin a) Inner link b) Outer link Key 1 outer plate 2 cottered connecting pin 3 cotter 4 detachable plate Key 1 outer plate 2 spring clip connecting pin 3 spring clip 4 detachable plate c)
29、 Connecting pin with cottered pin d) Spring clip connecting link BS ISO 1275:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:31:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 Key 1 roller 2 bush 3 cranked plate 4 cranked link pin 5 cotter e) Single cranked link Key 1 roller 2 inner p
30、late 3 pin, riveted 4 cranked plate 5 bush f) Double cranked link NOTE 1 Plate dimensions are shown in Table 1. NOTE 2 Fasteners can be of various designs. Figures give examples. Figure 2 Types of link BS ISO 1275:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:31:31 GMT+00:00 2006, U
31、ncontrolled Copy, (c) BSI 4 3.2 Designation Double-pitch transmission precision roller chains are designated by the standard ISO chain numbers given in Table 1. These chain numbers have been obtained by taking the standard ISO chain number for the base chain (given in ISO 606) and adding the prefix
32、2. EXAMPLE Chain ISO 1275-208B 3.3 Dimensions Chains shall conform to the dimensions shown in Figure 3 and given in Table 1. Maximum and minimum dimensions are specified to ensure the interchangeability of links produced by different makers of chain. They represent limits for interchangeability, but
33、 are not the manufacturing tolerances. In this International Standard, only double-pitch simplex chain dimensions are shown. 3.4 Tensile testing 3.4.1 General The minimum tensile strength is that value which shall be exceeded when a tensile force is applied to a sample tested to destruction as defin
34、ed in 3.4.2. This minimum tensile strength is not a working load but is intended primarily as a comparative figure between chains of various constructions. These testing requirements do not apply to cranked links, connecting links or chains with attachments as their tensile strength could be reduced
35、. 3.4.2 Testing A tensile force shall be applied slowly to the ends of a chain length, containing at least five free pitches, by means of shackles permitting free movement on both sides of the chain centre-line, in the normal plane of articulation. Failure shall be considered to have occurred at the
36、 first point where increasing extension is no longer accompanied by increasing force, i.e. the summit of the force/extension diagram. The force at this point must exceed the minimum tensile strength stated in Table 1. Tests in which failures occur adjacent to the shackles shall be disregarded. The t
37、ensile test shall be considered a destructive test. Even though a chain may not visibly fail when subjected to a force equivalent to the minimum tensile strength, it will have been stressed beyond the yield point and will be unfit for service. 3.5 Preloading It is recommended that all chains be prel
38、oaded by applying a minimum tensile force equivalent to 30 % of the minimum tensile strength given in Table 1. BS ISO 1275:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:31:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Table 1 Principal chain dimensions, measuring forces and tensile
39、strengths (see Figure 3) Pitch Maximum roller diameter (small) a Maximum roller diameter (large) a Minimum width between inner plates Maximum bearing pin body diameter Minimum bush bore Minimum chain path depth Maximum plate depth Minimum cranked link b Maximum width over inner link Minimum width be
40、tween outer plates Maximum width over bearing pin Maximum additional width for joint fastener c p d1 d7 b1 d2 d3 h1 h2 l1 b2 b3 b4 b7 Measuring force Minimum tensile strength ISO Chain number mm N kN 208A 25,4 7,92 15,88 7,85 3,98 4,00 12,33 12,07 6,9 11,17 11,31 17,8 3,9 120 13,9 208B 25,4 8,51 15,
41、88 7,75 4,45 4,50 12,07 11,81 6,9 11,30 11,43 17,0 3,9 120 17,8 210A 31,75 10,16 19,05 9,40 5,09 5,12 15,35 15,09 8,4 13,84 13,97 21,8 4,1 200 21,8 210B 31,75 10,16 19,05 9,65 5,08 5,13 14,99 14,73 8,4 13,28 13,41 19,6 4,1 200 22,2 212A 38,1 11,91 22,23 12,57 5,96 5,98 18,34 18,10 9,9 17,75 17,88 26
42、,9 4,6 280 31,3 212B 38,1 12,07 22,23 11,68 5,72 5,77 16,39 16,13 9,9 15,62 15,75 22,7 4,6 280 28,9 216A 50,8 15,88 28,58 15,75 7,94 7,96 24,39 24,13 13 22,60 22,74 33,5 5,4 500 55,6 216B 50,8 15,88 28,58 17,02 8,28 8,33 21,34 21,08 13 25,45 25,58 36,1 5,4 500 60,0 220A 63,5 19,05 39,67 18,90 9,54 9
43、,56 30,48 30,17 16 27,45 27,59 41,1 6,1 780 87,0 220B 63,5 19,05 39,67 19,56 10,19 10,24 26,68 26,42 16 29,01 29,14 43,2 6,1 780 95,0 224A 76,2 22,23 44,45 25,22 11,11 11,14 36,55 36,20 19,1 35,45 35,59 50,8 6,6 1 110 125,0 224B 76,2 25,4 44,45 25,40 14,63 14,68 33,73 33,40 19,1 37,92 38,05 53,4 6,6
44、 1 110 160,0 228B 88,9 27,94 30,99 15,90 15,95 37,46 37,08 21,3 46,58 46,71 65,1 7,4 1 510 200,0 232B 101,6 29,21 30,99 17,81 17,86 42,72 42,29 24,4 45,57 45,70 67,4 7,9 2 000 250,0 a Large rollers are principally for conveyor chains but are sometimes used on transmission chains; add suffix “L” to t
45、he chain number. b Cranked links are not recommended for use in highly stressed applications. c The actual dimensions will depend on the type of fastener used but should not exceed the dimensions given and should be obtained by the purchaser from the manufacturer. 5 BS ISO 1275:2006 Licensed Copy: s
46、heffieldun sheffieldun, na, Sun Nov 26 06:31:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 3.6 Length validation Measurement of chains shall take place after preloading but before lubricating. The standard length for measurement shall be a minimum of a) 610 mm for ISO chain numbers 208A to 210B in
47、clusive, b) 1 220 mm for ISO chain numbers 212A to 232B inclusive. The chain shall be supported throughout its entire length and the measuring force given in Table 1 shall be applied. The measured length shall be the nominal length subject to tolerance of 0,15 0 + %. The length accuracy of chains wh
48、ich have to work in parallel may be matched within closer tolerances. 3.7 Marking The chains shall be marked with the manufacturers name or trademark. The chain number quoted in Table 1 should be marked on the chain. BS ISO 1275:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:31:31 GM
49、T+00:00 2006, Uncontrolled Copy, (c) BSI 7 Key 1 single cranked link 2 chain section The chain path depth, h1, 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 given by b4 + b7 for riveted pin end and fastener on one side, b4 + 1,6b7 for headed pin end and fastener on one side, and b4 + 2b7 for fasteners on both sides. Figure 3 Chains BS ISO 1275:2006 Licensed Copy: sheffieldun sheff