BS-AU-50-2.2A-1984.pdf

BRITISH STANDARD AUTOMOBILE SERIES BS AU 50-2.2a:1984 (Superseding BS AU 50-2.2:1984 Incorporating Amendment No. 1 Tyres and wheels Part 2: Wheels and rims Section 2a: Specification for dimensions of wheel naves and hub centres for commercial vehicles UDC 629.113.012.3.012.64:629.114.4 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.2a:1984 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 28 September 1984 © BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference AUE/4 Draft for comment 82/79152 DC ISBN 0 580 13970 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Automobile Standards Committee (AUE/-) to Technical Committee AUE/4 upon which the following bodies were represented: Agricultural Engineers Association British Industrial Truck Association British Pressure Gauge Manufacturers Association British Rubber Manufacturers Association Bus and Coach Council Department of Transport London Transport Executive Ministry of Defence Motor Cycle Association of Great Britain Motor Industry Research Association Retread Manufacturers Association Road Haulage Association Ltd. Society of Motor Manufacturers and Traders Limited Amendments issued since publication Amd. No.Date of issueComments 8586June 1995Indicated by a sideline in the margin Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.2a:1984 © BSI 02-2000i Contents Page Committees responsibleInside front cover Forewordii 2.1Scope1 2.2Wheel nave and hub dimensions1 2.3Stud seating plane1 Appendix A Wheel nave and hub dimensions for spherical mountings for commercial vehicles and their derivatives5 Appendix B Recommended method for checking variation of stud seatings6 Figure 1 Dimensions of type A mounting: spigot mounting2 Figure 2 Dimensions of type B mounting: conical mounting3 Figure 3 Examples of recommended wheel-to-hub assemblies4 Figure 4 Dimensions of spherical mounting5 Figure 5 Recommended method for checking variation of stud seatings6 Table 1 Dimensions of type A mounting: spigot mounting2 Table 2 Dimensions of type B mounting: conical mounting3 Table 3 Dimensions of spherical mounting5 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.2a:1984 ii © BSI 02-2000 Foreword BS AU 50-2, Wheels and rims, was first published in 1964. It was revised in 1973 as BS AU 50-2a, Wheels and rims Dimensions. In 1984 section 4 of BS AU 50-2a was revised and published separately as BS AU 50-2.2. In addition to the dimensional data for commercial vehicle wheel mountings, this Section includes information on wheel nave and hub mountings using spherical countersinks in the Appendix A. Figure 3 shows typical wheel-to-hub assemblies which are recommended current practice. There is no British Standard for wheel and hub dimensions for passenger cars and their derivations, as the types of mountings are numerous and varied. It was decided that it would not be practicable to prepare a useful standard. Tyre, wheel, rim and valve requirements are given in the following Parts and Sections of BS AU 50: Tyres and wheels: Part 1: Tyres; Section 0: General; Section 1: Car tyres; Section 2: Commercial vehicle tyres; Section 3: Off-the-road tyres; Section 4: Agricultural vehicle tyres; Section 5: Industrial vehicle tyres; Section 6: Motorcycle tyres; Section 7: Moped tyres; Section 8: Code of practice for the storage of tyres, inner tubes and flaps; Part 2: Wheels and rims; Section 0: General (including terms and definitions, and construction and workmanship); Section 2: Specification for dimensions of wheel naves and hub centres for commercial vehicles; Section 3: Specification for road-wheel nuts, studs and bolts for commercial vehicles; Section 5: Road wheels manufactured wholly or partly of cast light alloy for passenger cars; Section 6: Specification for road wheels manufactured wholly or partly of light alloy for mopeds and motor cycles; Section 7: Code of practice for the selection and care of wheels for commercial vehicles; Section 8: Code of practice for the selection and care of wheels for passenger cars (including caravans and light trailers); Part 3: Valves; Section 1: Specification for valve dimensions; Section 2: Tyre valve threads 5V1, 5V2, 6V1 and 8V1; Section 3: Tyre valve threads 9V1, 10V2, 12V1, and 13V1; Section 4: Tyre valve threads 8V2, 10V1, 11V1, 13V2, 15V1, 16V1, 17V1, 17V2, 17V3, 19V1, and 20V1; Section 5: Dimensions for ISO core chamber No. 1 for tyre inflation valves; Section 6: Dimensions for ISO core chamber No. 2 for tyre inflation valves; Section 7: Code of practice for the selection and care of tyre inflation valves for passenger cars (including caravans and light trailers); Section 8: Code of practice for the selection and care of tyre inflation valves for commercial vehicles; Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.2a:1984 © BSI 02-2000iii Part 4: Rim profiles and dimensions; Section 0: General; Section 1: Car rims; Section 2: Commercial vehicle rims; Section 3: Off-the-road rims; Section 4: Agricultural tractor and machine rims; Section 5: Industrial vehicle rims; Section 6: Motorcycle rims; Section 7: Moped rims. 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 to iv, pages 1 to 6 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. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.2a:1984 © BSI 02-20001 2.1 Scope This Section of the standard specifies dimensional requirements for wheel naves and hub centres for commercial vehicles and their derivatives. The mountings are either type A: spigot mounting or type B: conical mounting. 2.2 Wheel nave and hub dimensions Wheel nave and hub dimensions shall comply with the requirements for the relevant type A or type B mounting given in Figure 1 and Table 1 and Figure 2 and Table 2. NOTE 1Type A is preferred for future designs, as it is considered that the traditional UK method of wheel mounting, type B, will gradually be replaced by type A mountings. NOTE 2Examples of recommended wheel-to-hub assemblies are given in Figure 3. NOTE 3Data for spherical mountings are given in Appendix A for information only. NOTE 4Difficulty can arise during wheel removal due to seizure on to the spigot. The use of an interrupted spigot is recommended to assist with removal procedures. 2.3 Stud seating plane For type B mountings, for wheels capable of being assembled in dual formation, the variation of the seating plane of the inner countersinks shall be not greater than 0.25 mm. NOTE 1A recommended checking method is given in Appendix B. NOTE 2The inner countersink is the countersink on which the wheel nuts or studs engage when assembled as dual wheels. While the plane is important only to the inner wheel of the pair, all wheels are checked to ensure interchangeability. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.2a:1984 2 © BSI 02-2000 Table 1 Dimensions of type A mounting: spigot mounting Figure 1 Dimensions of type A mounting: spigot mounting Wheel naveHub DesignationNumber of stud holes a D1D2D3D4DesignationNumber of studs a D1Stud diameter D5D6 min. AW6 AW8 AW10/1 AH10/2 6 8 10 10 mm 205 275 225 335 mm 21 24 26 26 mm 161 221 176 281 mm 255 325 285 390 AH6 AH8 AH10/1 AH10/2 6 8 10 10 mm 205 275 225 335 mm 18 20 22 22 mm 160.8 220.8 175.8 280.8 mm 250 320 280 385 a Stud holes and studs shall be equally spaced on pitch circle diameter D 1. +1 0 +0.2 0 0 0.2 0 5.0 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.2a:1984 © BSI 02-20003 Table 2 Dimensions of type B mounting: conical mounting Figure 2 Dimensions of type B mounting: conical mounting Wheel naveHub Designation Number of stud holes ab D1D2d µc D3D4DesignationNumber of studs ab D1Stud diameter D5D6 ± 1°min.max. BW6/1 BW6/2 BW8 BW10/1 BW10/2 BW10/3 6 6 8 10 10 10 mm 170 205 275 335 335 335 mm 21.8 25 25 25 28.2 28.2 mm 26.7 31 31 31 34 34 ° 80 80 80 80 80 80 mm 130 161 221 281 276 281 mm 223 255 325 390 390 390 BH6/1 BH6/2 BH8 BH10/1 BH10/2 8H10/3 6 6 8 10 10 10 mm 170 205 275 335 335 335 18 mm 7/8 in BSF 7/8 in BSF 7/8 in BSF 1 in BSF 1 in BSF mm 129 160 220 280 275 280 mm 222 250 320 385 385 385 a Stud holes and studs shall be equally spaced on pitch circle diameter D 1. b The true position tolerance relates only to the stud and nut seating. c The axis of the cone-seating shall be perpendicular to the mounting face within ± 15. +0.8 0 +0.5 0.25 +1 0 0 5.0 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.2a:1984 4 © BSI 02-2000 Figure 3 Examples of recommended wheel-to-hub assemblies Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.2a:1984 © BSI 02-20005 Appendix A Wheel nave and hub dimensions for spherical mountings for commercial vehicles and their derivatives The data given in Figure 4 and Table 3 for the spherical type of wheel mounting is for information only and is not part of the requirements of this standard. Table 3 Dimensions of spherical mounting Figure 4 Dimensions of spherical mounting Number of stud holes ab D1D2dRD3D4Stud diameterD5D6 min.max. 6 6 8 10 mm 170 205 275 335 mm 21.8 21.8 27 27 mm 26.7 26.7 32 32 mm 16 16 18 18 mm 130 161 221 281 mm 223 255 325 390 mm 16 and 18 18 22 22 mm 129 160 220 280 mm 222 250 320 385 a Stud holes and studs shall be equally spaced on pitch circle diameter D 1. b The true position tolerance relates only to the stud and nut seating. +0.8 0 +0.5 0.25 +1.0 0 0 5.0 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.2a:1984 6 © BSI 02-2000 Appendix B Recommended method for checking variation of stud seatings The recommended method of checking the variation of the stud seating plane is by placing spherical balls (of equal size) in each seating and measuring the variation from a datum plate resting on these balls (see Figure 5). Figure 5 Recommended method for checking variation of stud seatings Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.2a:1984 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. 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