1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58associated chain sprockets for transmission and conveyorsICS 21.220.30; 53.040.20Double-pitch preci
2、sion roller chains, attachments and BRITISH STANDARDBS ISO 1275:2006BS ISO 1275:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2006 BSI 2006ISBN 0 580 49024 6A list of organizations represented on this committee can be obtained o
3、n request to its secretary.Cross-referencesThe 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 Electroni
4、c Catalogue or of British Standards 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.Summary of pagesThis doc
5、ument comprises a front cover, an inside front 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 publicationAmd. No. Date Comments aid enquirer
6、s to understand the text; present to the 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.National forewordThis British Stan
7、dard reproduces verbatim ISO 1275:2006 and implements it as the UK national standard. It supersedes BS ISO 1275:1995 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee MCE/1, Chains and chain sprockets for power transmission and conveyors, which has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 r
8、esponsibility to:Reference numberISO 1275:2006(E)INTERNATIONAL STANDARD ISO1275Fourth edition2006-07-01Double-pitch precision roller chains, attachments and associated chain sprockets for transmission and conveyors Chanes de prcision rouleaux pas double, plaques-attaches et pignons dents corresponda
9、nts pour transmission et manutention BS ISO 1275:2006ii iiiContents 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 valid
10、ation 6 3.7 Marking 6 4 Conveyor chains. 8 4.1 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 shape15 5.3 Radial run-out 19 5.4 Axial run-out (wobble) 1
11、9 5.5 Pitch accuracy of sprocket teeth 19 5.6 Bore tolerance. 20 5.7 Marking 20 Annex A (normative) Pitch circle diameters 21 BS ISO 1275:2006iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of p
12、reparing 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. International organizations, governmental and non-governmental,
13、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 the rules given in the ISO/IEC Directives, Part 2. The main ta
14、sk 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 approval by at least 75 % of the member bodies casting a vote. Attenti
15、on 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 ISO/TC 100, Chains and chain sprockets for power transmission a
16、nd conveyors. This fourth edition cancels and replaces the third edition (ISO 1275:1995), which has been technically revised. BS ISO 1275:2006vIntroduction This International Standard has been established to cover a range of chains used in the majority of countries in the world by unifying dimension
17、s, strengths and other data from current national standards. The principal feature of these chains is their derivation from the 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
18、 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 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 individu
19、al links, and the sprocket dimensions allow complete interchangeability of chains of the same pitch and the same chain designation (either A or B series). BS ISO 1275:2006blank1Double-pitch precision roller chains, attachments and associated chain sprockets for transmission and conveyors 1 Scope Thi
20、s 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. It covers dimensions, tolerances, length measurement, preloading and minimum tensile stren
21、gths. 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 intended for use under less onerous conditions with respect to speed and power transmitted t
22、han 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 preferred numbers of teeth are 7, 9, 10, 11, 13, 19, 27, 38 and 57. 2 Normative references
23、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 document (including any amendments) applies. ISO 286-2, ISO system of limits and fits Part 2:
24、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 3.1 Assembly and component nomenclature The nomenclature of the chain assemblies and thei
25、r 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 1275:20062 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 cotte
26、r 4 detachable plate Key 1 outer plate 2 spring clip connecting pin 3 spring clip 4 detachable plate c) Connecting pin with cottered pin d) Spring clip connecting link BS ISO 1275:20063Key 1 roller 2 bush 3 cranked plate 4 cranked link pin 5 cotter e) Single cranked link Key 1 roller 2 inner plate 3
27、 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 1275:20064 3.2 Designation Double-pitch transmission precision roller chains are designated by th
28、e 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 2. EXAMPLE Chain ISO 1275-208B 3.3 Dimensions Chains shall conform to the dimensions shown in Figure 3 and given i
29、n 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 are not the manufacturing tolerances. In this International Standard, only double-pitch simplex chain dimensions
30、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 defined in 3.4.2. This minimum tensile strength is not a working load but is intended primarily as a comparative figure
31、 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. 3.4.2 Testing A tensile force shall be applied slowly to the ends of a chain length, containing at least five fr
32、ee 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 first point where increasing extension is no longer accompanied by increasing force, i.e. the summit of the force
33、/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 tensile test shall be considered a destructive test. Even though a chain may not visibly fail when subjected to a f
34、orce 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 preloaded by applying a minimum tensile force equivalent to 30 % of the minimum tensile strength given in Table 1. BS
35、ISO 1275:2006Table1 Principal chaindimensions,measuring forcesand tensilestrengths(see Figure 3)Pitch Maxi mum r o l l er diamet er (sma ll)a Maxi mum r o l l er diamet er (lar ge) a Minim u m w i dth betw een in ner platesMaxi mum b ear ing pin bod y dia m eterMinim um bu sh boreMinim u m ch ain pa
36、th dep t hMaxi mum p l ate depthMinim u m cr a n ked link b Maxi mum w i dth over inn e r linkMinim u m w i dth betw een out er platesMaxi mum w i dth over beari ng pi nMaxi mum addition al w idth f o r joint fast ener c p d1d7b1d2d3h1h2l1b2b3b4b7Meas uring forc e Minim u m ten s ile strength ISO Ch
37、ain num ber mm NkN208A 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 15,88 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
38、,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 26,9 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
39、 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 9,56 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
40、,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 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
41、a Large rollersare principallyfor conveyor chainsbutare sometimesused on transmissionchains;add suffix“L” to the chain number.b Cranked links are notrecommended for use inhighly stressed applications.c The actual dimensionswill dependon thetype offastener used butshould notexceed the dimensionsgiven
42、 and should beobtained by the purchaser fromthe manufacturer.5BS ISO 1275:20066 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 inclusive, b) 1
43、 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 0,150+%. The length accuracy of chains which have to work
44、 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 1275:20067Key 1 single cranked link 2 chain section The chain path depth, h1, is the minimum
45、 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+ b7for riveted pin end and fastener on one side, b4+ 1,6b7for headed pin end and fastener on one side, and b4+ 2b7for fasteners on both sides. Figure 3
46、Chains BS ISO 1275:20068 4 Conveyor chains 4.1 General Except where otherwise stated, the shapes, dimensions and test details for the chain and sprockets shall conform to the requirements of Clauses 3 and 5, respectively, substituting reference to Table 2 in place of Table 1 where appropriate. It is
47、 usual for chains used for conveyor purposes to have straight-sided (not waisted) side plates. Additionally, an alternative large roller of diameter d7may be adopted. These features are illustrated in Figure 4. 4.2 Nomenclature The nomenclature of Figure 2 is also applicable to conveyor chains. Figu
48、res 2 and 4 do not define the actual form of the chain plates. Figure 4 Conveyor chain with large rollers 4.3 Designation Double-pitch precision roller chains suitable for conveyor purposes are designated additionally with the prefix C when straight-sided chain plates (see Figure 4) are used, and wi
49、th the suffix L when the alternative large size roller (d7) is adopted. When necessary for the purpose of distinguishing between the chain roller sizes adopted, the optional suffix S may be applied to chains with the smaller roller. 4.4 Dimensions When the large roller size is adopted, dimension d1shall be replaced by d7in sprocket formula. Dimensions shall be in accordance with Table 2. 4.5 Length validation The measured length of plain chain shall be the nominal length subject to a tolerance of 0,150+%. The measured leng
