1、STD-BSI BS IS0 487-ENGL 1778 Lb24bbl 0745520 92b M BRITISH STANDARD Steel roller chains, types S and C, attachments and sprockets ICs 21.220.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS IS0 187:1998 k?corpomting Jom-Lgmdum No. 1 - - - _ STD-BSI BS IS0 987-ENGL 1778 Lb
2、29bb 07q5523 862 M BS IS0 4E1998 Issue 2, January 1999 AmdNo. Date 10410 January This British Standard, having been prepared under the direction of the Enginem Sector Bod, was pubiished under the authohv of the Standards Board and comes into effect on 16 September 1998 Textaffected Front cover title
3、 corrected National foreword This British Standard reproduces verbatim IS0 4!37:1998 and implements it as the UK national standmi. It supersedes BS 29471986 which is withhwn. “he UK participation in its preparation was entrusted W Technical committee MCW1, Chains and chain wheels for power transmw i
4、on and conveyors, which has the responsibility to: - aid enquirers to understand the tea - present to the responsible internalionaUEumpean commitee any enquiries on the inhpretation, or proposals for change, and keep the UK mterests informed; - monitor related international and European developments
5、 and promulgate themintheuK. A list of orwons represented on this committee can be obtained on request to its secretaty. Cross-references The British Standards which implement international or European publications refed to in this document may be found in the BSI standards Catalogue under the secti
6、on entitled “Intemational Standards Correspondence Index“, or by using the “Find- fdty of the BSI Standards Electronic Catalogue. A British StanM does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application. Complianc
7、e with a British Standard does not of itself confer immunity from legal obligations. Q BSI 01-1999 STDmBSI BS IS0 4B7-ENGL 1978 W Lb24bbS 0745522 7T9 Issue 1, Jmm 1999 BS IS0 487:1998 Page Front cover Inside front cover a b IS0 title page Issue Page Issue 2 ii original 2 1 to 18 original 1 Inside ba
8、ck cover blank blank Back cover original original O BSI 01-1999 a STD-BSI BS IS0 qW-ENGL 1998 Lb24bbS 0745523 b35 m BS IS0 487:1998 INTERNATIONAL STANDARD IS0 407 Third edaion 1998-07-1 5 Steel roller chains, types S and Cy attachments and sprockets Chaines rouleaux en acier, types S e? C, plaques-a
9、ttaches e? mues dentes * * cn Reference number IC0 487:1998(E) i BS IS0 487:1998 Foreword IC0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through
10、 IS0 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, in liaison with ISO,. also take- part in the work. IS0 collabora
11、tes closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft IntemertiOnal Standards adopted by the technical committees are circulated to the member bodies for voting. PuMication as an Intemational Standard requires approval by at le
12、ast 75 % of the member bodies casting a vote. Intemational Standard IS0 487 was prepared by Technical Committee lSO/TC 100, Chains and chain wheels for power transmission and conveyors. This third edition cancels and replaces the second edition (IS0 487:1984), which has been revised to include the l
13、atest features and products that are needed by industries using these chains and attachments. This edition introduces a new range of higher strength chains (“H“ series) and the “F4“ attachments for the S45 and S55 chains whilst deleting the “com picker“ attachments as these are not deemed relevant t
14、o current practice in industry. Annex A forms an integral part of this International Standard. Annex B is for information only. STD-BSI BS IS0 q87-ENGL 1998 m Lb24bb9 0745525 Li08 m BS IS0 487:1998 Steel roller chains, types S and C, attachments and sprockets 1 Scope This Intemational Standard speci
15、fies the characteristics of a range of steel roller chains, dimensionally derived from the malleable iron type and suitable for the conditions of operation and maintenance prevailing in such fields as agriculture, building, quarrying and related industry, mechanical handling, etc., and of associated
16、 chain sprockets. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this Intemational Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreeme
17、nts based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. - = - IS0 1851988, Grey casf iron - Classification. IS0
18、6o:1994, Short-pitch transmission precision roller chains and chain wheels. I E - 7 - E * 3 Chains m * 3.1 Nomenclature The nomenclature of chains and their component parts is given in figures 1 and 2. 3.2 Designation Steel roller chains shall be designated by the standard IS0 chain numbers given in
19、 table 1 3.3 Dimensions The chains shall conform to the dimensions given in table 1. Maximum and minimum dimensions are specified to ensure the interchangeability of links produced by different chain makers. They represent limits for inter- changeability, but are not the actual tolerances that shoul
20、d be used in manufacture. 3.4 Minimum tensile strength 3.4.1 The minimum tensile strength is the value that shall be exceeded when a tensile force is applied to a sample which is tested to destruction as described in 3.4.2. This strength is not a working force. It is intended primarily as a comparat
21、ive figure between chains of various materials and constructions. For application information, the manufacturers or their published data should be consulted. 3.4.2 A tensile force, not less than that specified in table 1, shall be applied slowly to the ends of a chain length containing at least five
22、 free pitches, by means of shackles permitting free movement on both sides of the chain centre line, in the normal plane of articulation. 1 BS IS0 487:1998 Failure shall be considered to have occurred at the first point where increasmg extension is no longer accompanied by increasing force, .e. the
23、summit of the fodextension diagram. Tests in which failures occur adjacent to the shackles shall be disregarded. 3.4.3 The tensile test shall be considered a destructive test. Even though a chain may not fail when subjected to the force equivaient to the minimum tensile strength, it will have been s
24、tressed beyond the yield point and will be unfit for service. 3.5 Ptm-bciding It is recommended that ail chains be pre-load tested by applying a force equivalent to at least one third of the minimum tensile strength given in table 1. 3.6 Length mmurement Finished chains shall be measured after pre-l
25、oading (where applicable) but before they are lubricated. The standard length for measurement shall be a minimum of 20 times the pitch with a maximum length of 1 524 mm and shall terminate with an inner link at each end. The chain shall be supported throughout its entire length and the measuring loa
26、d in table 1 shall be applied. To comply with this International Standard, the length shall be the nominal length subject to the limits of tolerance $3. The length accuracy of chains which have to work in parallel shall be within the limits above but matched in agreement with the manufacturer. 3.7 C
27、ranked link A cranked link is required to obtain an odd number of pitches in a chain. The crank shall be central between pins. Using the symbols given in table 1, its length shall not exceed p - 1,15h,. Attachment plates shall not be part of a cranked link. I 3.8 Marking The chains shall be matked w
28、ith the manufacturers name or trademark. It is recommended that the chains be marked with the Is0 chain number specified in table 1. 4 Chain attachment plates The three basic types of attachment plates covered by this International Standard are described in 4.1 to 4.3. 4.1 F1 and F4 attachmnt plates
29、 F1 and F4 attachment plates form a verhl platform to serve as a pusher. Each attachment plate accepts one fixing bolt for this pur. Dimensions shall be in accordance with tables 2 and 3. 4.2 K1 atrrchmentpl- Kl attachment plates form a piatform suitable to accommodate slats or other devices. Each a
30、ttachment plate accepts one fixing boit for this purpose. Dimensions shall be in accordance with tath 4 and 5. The dimensions not specified in these tables are at aie discreaOn ofthe manufacturer. 2 - - STD-BSI BS IS0 487-ENGL 1778 = 1ib24bb9 0745527 280 E BS IS0 487:1998 The maximum length of K1 at
31、tachment plates and/or of their bending radius shall be such as to preclude interference with the plates of adjoining links having the maximum depth (as shown in column 6, plate depth h, of table 1). 4.3 M1 attachment plates M1 attachment plates sewe as pushers or to accept staybars or other devices
32、. The dimensions shall conform to those specified in table 6. The length of M1 attachment plates (in the direction along the chain) shall not exceed 87 % of the pitch (half this amount on either side of the link centre). NOTE - The form and length of attachment plates should provide for the possibil
33、ity of their use on adjoining links of the chain, noting that the attachment plates may be placed on one side or on both sides of the chain, and on either the inner or the outer link, or on both. 5 Sprockets 5.1 General 5.1.1 Materials Grey iron castings of grade 15, in accordance with IS0 185, are
34、of adequate strength for the sprockets. 5.1.2 Dimensions of teeth I - i - The dimensions of the teeth shall comply with the requirements of either 5.2 or 5.3, according to the application and the method of manufacture. 7 - 5.1.3 Marking E * * It is recommended that the sprockets be marked with the f
35、ollowing information: VI a) manufacturers name or trademark; b) number of teeth; c) chain designation (IS0 chain number or manufacturers equivalent). 5.2 Dimensions of teeth on general purpose sprockets with cast or flame cut tooth profiles 5.2.1 Tooth form The teeth shall have the form shown in fig
36、ure 8, with the dimensions given in tables 7 and 8. 5.2.2 Tooth profile The teeth shall have the profile shown in figure 9 and the dimensions given in table 9. 5.2.3 Root diameter, d, The root diameters shall be in accordance with table 10. They shall be checked by using the measurement over pins pr
37、ocedure, given in annex A, with the measuring pins touching the working faces of the teeth. 3 BS IS0 487:1998 52.4 Shrouddiim,d, The maximum diameter of the shroud, given in figure 9 and table 9, shall be determined from the following formula: 180“ dg=pcot- -1,04h2-0,76 mm Z where 4 is the plate dep
38、ai in accordance with table 1, in millimetres; p is the chain pitch, in millimetres; z is the number of teeth. NOTE - This fmua assumes the use of plates with a straight form. 5.2.5 Tip diameter, da 59.5.1 The tip diameter shall be determined from the following formula: da = 4 + 2h where 4 is the ro
39、ot diameter of the teeth, in millimetres; It is the tooth depth, in millimetres. 5.2.5.2 When slats or other devices are fastened to K attachments and pass over the tips of the teeth, the maximum tip diameter of the sprocket, given in figure 9 and in table 9, shall be determined from the following f
40、ormula: d- = pCOt+1,84 Z I i where h4 is the platform height of K attachments in accordance with tables 4 and 5, in millimetres. p is the chain pitch, in millimetres; z is the number of teeth. 5.26 Tukmncua The dimensions in tables 7 to 10 are subject to the limits of tolerance that would be obtaina
41、ble with industrial casting techniques, except for the following: a) tooth width: bfi f 5 %; b) tooth depth: h % c) roatdiameterdfinaccordancewithtable 11; 4 - - STD.BS1 BS IS0 Li87-ENGL 1778 = Lb24bb7 0745527 053 BS IS0 487:1998 NOTE - For applications where some build-up of foreign matter in the r
42、oller seating pocket is encountered, the lower ranges of the root diameter tolerances may be used, widening, I necessary, the tolerance for root diameter tor d, d 250 mm to a tolerance of 9 mm. The sides of the roller seating can also be relieved. 5.3 Dimensions of sprockets with machined tooth form
43、s and profiles 5.3.1 Tooth form lhe tooth form shall be that which would be produced by rotary tooth form cutters used in the manufacture of transmission roller chain sprockets in accordance with IS0 606, with the same number of teeth and the same roller diameter, or, if there is none, with the near
44、est larger roller diameter. NOTE - This description does not exclude other methods of manufacturing the same tooth form. 5.3.2 Tooth profile lhe teeth shall have a profile in accordance with the dimensions given in table 9. 5.3.3 Root diameter, df The requirements of 5.2.3 shall apply. 5.3.4 Blank d
45、iameter - 5.3.4.1 The blank diameter of the sDrocket. .e. the diameter to which the blank is Droduced and which eauals the tip diameter of the finished sprocket, shall be determined from the following formula: m E - * * VI where d, is the root diameter taken from table 10, in millimetres; h is the t
46、ooth depth taken from table 9, in millimetres. 5.3.4.2 When slats or other devices fixed to K attachments pass over the tips of the teeth, then the dimension da,= shall be determined in accordance with 5.2.5.2. 5.3.5 Shroud diameter, ds The requirements of 5.2.4 shall apply. 5.3.6 Tolerances The maj
47、or dimensions are subject to the following limits of tolerance: a) tooth width, b, , (see table 9): f 13 %; b) root diameter, df, (see table 10): ENGL- m;bS 0795538 OLL 9 BS IS0 487:1998 Tooth Width bfl 14,8 17,9 20,9 20,9 20,9 23.9 20.9 2899 18.5 23.1 1) FordBnerrsirn d tip diameter d, refer to 5.2
48、.5 and 5.3.6. 2) For dimension of toot diameter 4, refer to table 10. 3) For dimension of shroud diameter 4, refer to 5.2.4 and 5.3.5. If the shroud radus r, exceeds the value specified Hi able 9, d, should be decrsasedbyaconespondihgamwnt. 4) side reli may alternavetybe providedbyachamfer. Sida IUS
49、 nlw b. min. 19,l 23 25.4 3,3 2594 4 25.4 4 31.8 4 31 ,8 4.6 31 , 4 38,l 591 31 , 2.3 31,8 218 . . . - Tooth depth h max. 102 13,7 14,2 14,2 15,5 16 17,5 21,8 16,8 17,8 Is0 Shroud radius *a 1.3 1,3 1.3 1,3 1.3 13 1,3 1.3 1,3 1,3 Figure 9 -Tooth profile - Table 9 - Dimensions of tooth profile S32 542 s45 S52 S55 se2 sn S88 C55 CB20 14 16, 19,8 1 9,8 19.8 22.6 19,8 25.4 17,3 22,4 mdlw ndlus min. 19,l 25,4 25.4 2594 31.8 31.8 31,8 38.1 31 ,8 31 . max. 23 10.2 215 393 13,7 2,s 4 14,2 2.5 4 14,2 2.5 4 15.5 2,s 46 16 2.5 4 17,5 2.5 5.1 21,8 2,
