BRITISH STANDARD AUTOMOBILE SERIES BS AU 214 2 1988 ISO 7646 1986 Gearbox flanges — Part 2 Specification for dimensions for type A gearbox flanges for commercial vehicles and buses [ISO title Commerci[.]
Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 05: 05 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BRITISH STANDARD AUTOMOBILE SERIES BS AU 21 4-2:1 988 ISO 7646:1 986 Gearbox flanges — Part 2: Specification for dimensions for type A gearbox flanges for commercial vehicles and buses [ISO title: C ommercial vehicles and buses — Gearbox flanges — Type A] UD C 62 1 4/ : 62 82 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 05: 05 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 21 4-2:1 988 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Automobile Standards Committee (AUE/- ) to Technical Committee AUE/1 3, upon which the following bodies were represented: British Railways Board Department of Transport (Highways) Freight Transport Association Institute of Road Transport Engineers (Incorporated) London Regional Transport Ministry of Defence National Bus Company Road Haulage Association Ltd Society of Motor Manufacturers and Traders Limited This British Standard, having been prepared under the direction of the Automobile Standards Committee, was published under the authority of the Board of BSI and comes into effect on Amendments issued since publication 29 January 988 © BSI 2- 999 The following BSI references relate to the work on this standard: Committee reference AUE/1 Draft for comment 82/75548 DC ISBN 80 63 64 Amd No Date of issue Comments Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 05: 05 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 21 4-2:1 988 Contents Page Committees responsib le National foreword ii Scope and field of application References D imensions and tolerances D esignation Figure Figure 2 Figure 3 Figure Figure Tab le — D imensions and tolerances Pub lications referred to © BSI - 999 Inside front cover Inside back cover i Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 05: 05 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 21 4-2:1 988 National foreword This British Standard has been prepared under the direction of the Automobile Standards Committee and is identical with ISO 7646: 986 “Co m m ercial and b uses — Gearb ox flanges — Typ e A v ehicles ”, published by the International Organization for Standardization (ISO) Terminology and conventions The text of the International Standard has been approved as suitable for publication as a British Standard without deviation Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following The comma has been used as a decimal marker In British Standards it is current practice to use a full point on the baseline as the decimal marker Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard” Cross-references International Standard Corresponding British Standard ISO/R 286: 962 BS 4500 ISO lim its and fits Part : 969 General, tolerances and dev iations (Technically equivalent) ISO 7647: 986 BS AU 21 Part 3: 987 Gearb o x flanges Sp ecificatio n fo r dim ensio ns fo r typ e S gearb ox flanges for com m ercial v ehicles and b us es (Identical) The Technical Committee has reviewed the provisions of ISO 1 01 : 983 to which reference is made in the text, and has decided that they are acceptable for use in conj unction with this standard A related British Standard to ISO 1 01 is BS 308 “Engineering draw ing p ractice ” Part 3: 972 “Geo m etrical to lerancing ” A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages to 4, an inside back cover and a back cover This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover ii © BSI 2- 999 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 05: 05 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 21 4-2:1 988 Scope and field of application Dimensions and tolerances This International Standard specifies the nominal Nominal dimensions, tolerances and bolt hole fixing dimensions and tolerances which affect the positions which affect the interchangeability of type interchangeability between gearbox flanges and A flanges for gear- boxes are shown in Figure to mating parts used on commercial vehicles and Figure 5, and given in the Table buses The flanges covered by this International Standard are designated type A They are not interchangeable with type S flanges dealt with in ISO 7647 Designation Gearbox flanges meeting the requirements of this International Standard shall be identified by the Dimensions not specified are left to the discretion of following details in the order specified: the component manufacturer a) reference to this International Standard; b) the diameter of the flange, References ISO 286, ISO sys tem of lim its and fits ISO 1 01 , orientatio n, lo catio n and run- out — Generalities , definitions , indicatio ns on draw ings ISO 7647, Road v ehicles — Gearb ox flanges for 1; c) the number of fixing bolts; d) the size of the fixing bolts Technical draw ings — Geom etrical to lerancing — Tolerancing of fo rm , sym b ols, 1) d Exam p le: Designation of a gearbox flange type A with d = 50 mm and eight mm fixing bolts: Flange ISO 7646-1 × × 12 co m m ercial v ehicles and b uses — Typ e S 1) At present at the stage of draft (Revision of ISO/R 286: 962 ) © BSI 2- 999 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 05: 05 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 21 4-2:1 988 Figure Figure Position and run- out tolerances in millimetres © BSI - 999 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 05: 05 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI © BSI - 999 Figure Figure BS AU 21 4-2:1 988 Position and run- out tolerances in millimetres Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 05: 05 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 21 4-2:1 988 Position and run-out tolerances in millimetres Figure Table — Dimensions and tolerances Dimensions in millimetres d1 75 90 100 120 150 165 180 225 Number of number holes Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure a See ISO 286 b This dimension Figure 6 8 12 10 12 d5 +0,2 d3 h7 a d2 d4 b –0,2 6,1 62 42 51,6 8,1 74,5 47 8,1 10,1 84 101,5 12,1 130 16,1 16,1 16,1 140 155,5 196 l h –0,5 –0,2 5,5 1,8 61 2,3 57 75 70,5 84,3 2,3 2,3 90 110,7 10 2,3 95 110 140 115 130,5 171 12 12 15 2,3 2,3 shall be used when required to prevent bolt heads from rotating © BSI 12-1999 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 05: 05 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI Publications referred to See national foreword © BSI - 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