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1、BRITISH STANDARD AUTOMOBILE SERIES BS AU 50-1.4.7:1993 ISO 8664:1992 Tyres and wheels Part 1: Tyres Section 4: Agricultural tractor and machine tyres Subsection 4.7 Specification for marking, dimensions, load ratings and reference speeds for service description marked tyres for agricultural tractor
2、drive wheels Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:07:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.4.7:1993 This British Standard, having been prepared under the direction of the Automobile Standards Policy Committee, was published under
3、 the authority of the Standards Board and comes into effect on 15 May 1993 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference AUE/4 Draft for comment 86/78485 DC ISBN 0 580 21815 5 Committees responsible for this British Standard The preparation of this
4、 British Standard was entrusted by the Automobile Standards Policy Committee (AUE/-) to Technical Committee AUE/4, upon which the following bodies were represented: Agricultural Engineers Association Automobile Association British Industrial Truck Association British Pressure Gauge Manufacturers Ass
5、ociation British Rubber Manufacturers Association Bus and Coach Council Department of Transport Freight Transport Association Insitute of Road Transport Engineers (Inc) Motor Cycle Industrys Association of Great Britain Ltd. Motor Industry Research Association National Tyre Distributors Association
6、Retread Manufacturers Association Road Haulage Association Ltd. Society of Motor Manufacturers and Traders Ltd. Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:07:14 GMT+00:00 2006, Uncontrolled Copy, (
7、c) BSI BS AU 50-1.4.7:1993 BSI 11-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative references1 3Definitions1 4Tyre marking1 5Tyre dimensions1 6Tyre load ratings1 7Tyre applications other than at reference speed1 8Tyre application on combine harveste
8、rs3 Annex A (normative) Load index and tyre load for tyres with reference inflation pressure 160 kPa4 Annex B (informative) Tyres with reference inflation pressures 120 kPa and 210 kPa5 Table 1 Standard sizes, measurement rims, and dimensions2 Table 2 Load/speed relationship3 Table A.1 Load per tyre
9、 at reference speed and inflation pressure4 Table B.1 Load per tyre at reference speed and inflation pressure5 List of referencesInside back cover Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:07:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.4.7:
10、1993 ii BSI 11-1999 National foreword This Subsection of this Part of BS AU 50, prepared under the direction of the Automobile Standards Policy Committee, is identical with ISO 8664:1992 Agricultural tractor drive-wheel tyres Service description (load index-speed symbol) marked tyres, published by t
11、he International Organization for Standardization (ISO). BS AU 50 is issued in four Parts: Part 1: Tyres; Part 2: Wheels and rims; Part 3: Valves; Part 4: Rim profiles and dimensions. The Technical Committee has reviewed the provisions of ISO 4223-1:1989 to which normative reference is made in the t
12、ext, and has decided that they are acceptable for use in conjunction with this standard. 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
13、 itself confer immunity from legal obligations. Cross-references International StandardCorresponding British Standard BS AU 50 Tyres and wheels ISO 4251-1:1992Part 1 Tyres Subsection 4.1a:1993 Specification for designations and dimensions for ply-rating marked series tyres (Identical) ISO 4251-3:198
14、5Part 4 Rim profiles and dimensions Subsection 4.1:1991 Specification for existing (inch) series rims (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, an inside back cover and a back cover. This standard has been updated (see co
15、pyright 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 02:07:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.4.7:1993 BSI 11-19991
16、1 Scope This International Standard specifies the marking, dimensions, load ratings and reference speeds for existing series of agricultural tractor drive-wheel tyres with service description (load index and speed symbol). It applies to tyres of radial construction in the speed categories 30 km/h (s
17、peed symbol A6) and 40 km/h (speed symbol A8). 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to re
18、vision, and parties to agreements 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 ISO maintain registers of currently valid International Standards. ISO 4223-1:1989, Definitio
19、ns of some terms used in the tyre industry Part 1: Pneumatic tyres. ISO 4251-1:1992, Tyres (ply rating marked series) and rims for agricultural tractors and machines Part 1: Tyre designation and dimensions. ISO 4251-3:1985, Tyres and rims (existing series) for agricultural tractors and machines Part
20、 3: Rims. 3 Definitions For the purposes of this International Standard, the definitions given in ISO 4223-1 and the following definition apply. 3.1 cyclic loading application gradual increase of payload to maximum allowable load with unloading before off-field transport 4 Tyre marking The tyre mark
21、ing shall consist of the designation of the dimensional and constructional characteristics (tyre size) and the service condition characteristics (load index and speed symbol). EXAMPLE 5 Tyre dimensions Standard sizes, measurement rims, tyre design dimensions and maximum tyre dimensions in service ar
22、e given in Table 1. 6 Tyre load ratings Load indices and tyre loads for the speed indicated by the speed symbol (reference speed) and reference inflation pressures for the tyres of Table 1 are given in Annex A and Annex B. 7 Tyre applications other than at reference speed For applications without hi
23、gh and sustained torques, including road transport, the load/speed relationship is given in Table 2. The tyre manufacturer concerned shall be consulted for the actual pressure to be used when applying the load/speed relationship given in Table 2. Licensed Copy: London South Bank University, London S
24、outh Bank University, Sat Dec 09 02:07:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.4.7:1993 2 BSI 11-1999 The rim/wheel manufacturer shall be consulted for confirmation of the strength of the rim/wheel for the intended service. Table 1 Standard sizes, measurement rims, and dimensions Di
25、mensions in millimetres Tyre size Measurement rim width codea Design tyreIn service Section widthOverall diameter Maximum overall width Maximum overall diameterb a) Normal section height tyres 11.2 R 20 11.2 R 24 11.2 R 28 11.2 R 36 11.2 R 38 10284 995 1 095 1 200 1 400 1 455 307 1 015 1 115 1 220 1
26、 420 1 475 12.4 R 20 12.4 R 24 12.4 R 28 12.4 R 32 12.4 R 36 12.4 R 38 11315 1 045 1 145 1 250 1 350 1 450 1 500 340 1 070 1 170 1 275 1 375 1 475 1 525 13.6 R 24 13.6 R 28 13.6 R 36 13.6 R 38 12345 1 190 1 295 1 500 1 550 373 1 215 1 320 1 525 1 575 14.9 R 24 14.9 R 26 14.9 R 28 14.9 R 30 14.9 R 38
27、 13378 1 245 1 295 1 350 1 400 1 600 408 1 275 1 325 1 380 1 425 1 630 16.9 R 24 16.9 R 26 16.9 R 28 16.9 R 30 16.9 R 34 16.9 R 38 16.9 R 42 15429 1 320 1 370 1 420 1 475 1 575 1 675 1 775 463 1 350 1 400 1 450 1 505 1 605 1 705 1 805 18.4 R 24 18.4 R 26 18.4 R 28 18.4 R 30 18.4 R 34 18.4 R 38 18.4
28、R 42 16467 1 395 1 440 1 490 1 545 1 645 1 750 1 850 504 1 425 1 475 1 520 1 575 1 680 1 780 1 880 20.8 R 34 20.8 R 38 20.8 R 4218 528 1 735 1 835 1 935 570 1 770 1 870 1 970 23.1 R 26 23.1 R 30 23.1 R 34 20587 1 605 1 700 1 800 637 1 645 1 740 1 840 24.5 R 32216221 8006721 840 Licensed Copy: London
29、 South Bank University, London South Bank University, Sat Dec 09 02:07:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.4.7:1993 BSI 11-19993 Table 1 Standard sizes, measurement rims, and dimensions Table 2 Load/speed relationship 8 Tyre application on combine harvesters On combine harvester
30、s in cyclic loading application, except hillside combines, a load of up to 170 % of the basic tyre loads given in Table A.1 and Table B.1 is permitted for speeds up to 10 km/h with an inflation pressure increase of approximately 30 % (consult the tyre manufacturer). This load increase shall include
31、all possible field and user modifications that increase the vehicle mass and shall apply only to load increases which occur during the harvesting process. When not in cyclic application (e.g. grain tanks are empty during transport) the loads in Table 2 apply. For hillside operations over 11 (22 %) s
32、lope, only the basic tyre loads are permitted. The rim and wheel manufacturer shall be consulted concerning the strength of the wheels. Tyre size Measurement rim width codea Design tyreIn service Section widthOverall diameter Maximum overall width Maximum overall diameterb b) Low section height tyre
33、s 30.5 LR 32277751 8208371 860 a For approved rim contours see ISO 4251-1 and ISO 4251-3. The rim/wheel manufacturer shall be consulted for confirmation of the strength of the rim/wheel for the intended service. b Figures are based on regular service tyres. The tyre manufacturer shall be consulted i
34、f tyres with deviating profiles are used. Maximum tyre loada Speed km/h Tyres with speed symbol A6 (30 km/h reference speed) Tyres with speed symbol A8 (40 km/h reference speed) 10 15 20 25 30 35 40 45 50 150 134 123 111 100b 95 90 150 134 123 111 107b 103 100 96 91 a Expressed as a percentage of th
35、e basic tyre loads given in Table A.1 and Table B.1. b This also applies for all field applications with high and sustained torques. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:07:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.4.7:1993 4 BSI 11-
36、1999 Annex A (normative) Load index and tyre load for tyres with reference inflation pressure 160 kPa Tyre loads for the speed indicated by the speed symbol (reference speed see Table 2) for a range of tyres with a reference inflation pressure of 160 kPa are given in Table A.1. The inflation pressur
37、e is a minimum reference value for the loads given in the table. The tyre manufacturer concerned shall be consulted about the actual pressures to be used in practice. The load for dual tyres equals 1,76 times the load for a single tyre. Table A.1 Load per tyre at reference speed and inflation pressu
38、re Tyre sizeLoad index Basic tyre load kg Tyre sizeLoad index Basic tyre load kg 11.2 R 20 11.2 R 24 11.2 R 28 11.2 R 36 11.2 R 38 111 114 116 120 121 1 090 1 180 1 250 1 400 1 450 18.4 R 24 18.4 R 26 18.4 R 28 18.4 R 30 18.4 R 34 18.4 R 38 18.4 R 42 139 140 141 142 144 146 148 2 430 2 500 2 575 2 6
39、50 2 800 3 000 3 150 12.4 R 20 12.4 R 24 12.4 R 28 12.4 R 32 12.4 R 36 12.4 R 38 116 119 121 122 124 125 1 250 1 360 1 450 1 500 1 600 1 650 20.8 R 34 20.8 R 38 20.8 R 42 151 153 155 3 450 3 650 3 875 23.1 R 26 23.1 R 30 23.1 R 34 153 155 157 3 650 3 875 4 125 13.6 R 24 13.6 R 28 13.6 R 36 13.6 R 38
40、 121 123 127 128 1 450 1 550 1 750 1 800 24.5 R 321594 375 14.9 R 24 14.9 R 26 14.9 R 28 14.9 R 30 14.9 R 38 126 127 128 129 133 1 700 1 750 1 800 1 850 2 060 30.5 LR 321665 300 16.9 R 24 16.9 R 26 16.9 R 28 16.9 R 30 16.9 R 34 16.9 R 38 16.9 R 42 134 135 136 137 139 141 143 2 120 2 180 2 240 2 300
41、2 430 2 575 2 725 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:07:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.4.7:1993 BSI 11-19995 Annex B (informative) Tyres with reference inflation pressures 120 kPa and 210 kPa Tyre loads for the speed ind
42、icated by the speed symbol (reference speed see Table 2) for two ranges of tyres with reference inflation pressures of 120 kPa and 210 kPa are given in Table B.1. The inflation pressure is a minimum reference value for the loads given in the table. The tyre manufacturer concerned shall be consulted
43、about the actual pressures to be used in practice. The load for dual tyres equals 1,76 times the load for a single tyre. Table B.1 Load per tyre at reference speed and inflation pressure Tyre size Reference inflation pressure 120 kPaReference inflation pressure 210 kPa Load index Basic tyre load kg
44、Load index Basic tyre load kg 13.6 R 281171 2851261 700 14.9 R 26 14.9 R 28 14.9 R 30 121 122 123 1 450 1 500 1 550 132 133 134 2 000 2 060 2 120 16.9 R 24 16.9 R 26 16.9 R 28 16.9 R 30 16.9 R 38 126 128 129 130 134 1 700 1 800 1 850 1 900 2 120 137 139 140 141 145 2 300 2 430 2 500 2 575 2 900 18.4
45、 R 26 18.4 R 34 18.4 R 38 18.4 R 42 18.4 R 46 134 139 141 143 144 2 120 2 430 2 575 2 725 2 800 145 149 151 153 155 2 900 3 250 3 450 3 650 3 875 20.8 R 34 20.8 R 38 20.8 R 42 145 147 149 2 900 3 075 3 250 156 147 159 4 000 4 125 4 375 23.1 R 341513 4501614 625 24.5 R 321543 7501645 000 30.5 LR 3215
46、94 3751706 000 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:07:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:07:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI B
47、S AU 50-1.4.7:1993 BSI 11-1999 List of references See national foreword. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:07:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.4.7:1993 ISO 8664:1992 BSI 389 Chiswick High Road London W4 4AL BSI British St
48、andards 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
49、 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. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers