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1、BRITISH STANDARD BS AU 50-1.5.2:1994 ISO 3739-1: 1992 Tyres and wheels Part 1: Tyres Section 5: Industrial vehicle tyres Subsection 5.2 Specification for pneumatic tyres (metric series) on 5 tapered or flat base rims: Designation, dimensions and marking Licensed Copy: London South Bank University, L
2、ondon South Bank University, Sat Dec 09 03:40:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.5.2:1994 This British Standard, having been prepared under the direction of the Automobile Standards Policy Committee, was published under the authority of the Standards Board and comes into effect
3、 on 15 February 1994 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference AUE/4 Draft for comment 90/77637 DC ISBN 0 580 22803 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Automobile Stan
4、dards 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 Association British Rubber Manufacturers Association Bus
5、and Coach Council Department of Transport Freight Transport Association Institute of Road Transport Engineers (Inc) Motor Cycle Industrys Association of Great Britain Ltd. Motor Industry Research Association National Tyre Distributors Association Retread Manufacturers Association Road Haulage Associ
6、ation 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 03:40:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.5.2:1994 BSI 10-1999i Contents Page
7、 Committees responsibleInside front cover National forewordii 1Scope1 2Normative references1 3Definitions1 4Tyre designations1 5Marking3 6Tyre dimensions3 7Design tyre dimensions4 8Tyre size combinations4 9Method of measurement of tyre dimensions4 Table 1 Nominal rim diameter code1 Table 2 Correlati
8、on between load index (LI) and tyre load-carrying capacity (TLCC)2 Table 3 Correlation between speed symbol and speed category3 Table 4 Coefficients for calculation of maximum overall tyre dimensions in service4 Table 5 Tyre dimensional guidelines4 Table 6 Recommended combinations of nominal section
9、 widths and rim diameters5 List of referencesInside back cover Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:40:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.5.2:1994 ii BSI 10-1999 National foreword This Subsection of this Part of BS AU 50 has b
10、een prepared under the direction of the Automobile Standards Policy Committee and is identical with ISO 3739-1:1992 Industrial tyres and rims Part 1: Pneumatic tyres (metric series) on 5 tapered or flat base rims Designation, dimensions and marking, published by the International Organization for St
11、andardization (ISO). Other Parts of this standard are: Part 2: Wheels and rims; Part 3: Valves; Part 4: Rim profiles and dimensions. The Technical Committee has reviewed the provisions of ISO 3877-1 and ISO 4223-1 to which normative reference is made in the text and has decided that they are accepta
12、ble 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 itself confer immunity from legal obligat
13、ions. Cross-references International StandardCorresponding British Standard ISO 31-0:1981BS 5775 Specification for quantities, units and symbols Part 0:1982 General principles Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, an inside back
14、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. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:40:05 GMT+00:00 2006
15、, Uncontrolled Copy, (c) BSI BS AU 50-1.5.2:1994 BSI 10-19991 1 Scope This part of ISO 3739 specifies the main requirements, including designations, dimensions and markings of the metric series of pneumatic tyres primarily intended for industrial vehicles for use on prepared surfaces. The tyres are
16、based on the following parameters: a) speeds not exceeding 50 km/h; b) use on 5 tapered or flat base rims; c) rim diameters not exceeding rim diameter code of 15. NOTE 1The extension of the range of this nominal rim diameter code may be considered. ISO 3739-2 deals with load ratings; ISO 3739-3 deal
17、s with rim contours for these tyres. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 3739. At the time of publication, the editions indicated were valid. All standards are subject to revision, and part
18、ies to agreements based on this part of ISO 3739 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 31-0:1981, General principles concerning qua
19、ntities, units and symbols. ISO 3877-1:1978, Tyres, valves and tubes List of equivalent terms Part 1: Tyres. ISO 4223-1:1989, Definitions of some terms used in the tyre industry Part 1: Pneumatic tyres. 3 Definitions For definitions of terms relating to tyres, see ISO 4223-1; equivalent terms are gi
20、ven in ISO 3877-1. 4 Tyre designations 4.1 Dimensional and constructional characteristics The characteristics shall be indicated as follows: 4.1.1 Nominal section width The nominal section width of the tyre shall be indicated in millimetres, ending either in 0 or 5. 4.1.2 Nominal aspect ratio The no
21、minal aspect ratio shall be expressed as a percentage and shall be a multiple of 5. 4.1.3 Tyre construction code The tyre construction code shall be as follows: 4.1.4 Nominal rim diameter code For tyres mounted on existing rims, the code shall be as given in Table 1. Table 1 Nominal rim diameter cod
22、e 4.2 Service condition characteristics The service condition characteristics or service description shall be indicated as follows: 4.2.1 Load index The load index is a numerical code associated with a maximum load a tyre can carry at the speed indicated by its speed symbol under service conditions
23、specified by the tyre manufacturer. The correlation between load indices and tyre load-carrying capacities shall be as given in Table 2. 4.2.2 Speed symbol The speed symbol shall be as given in Table 3. The speed symbol or speed category indicates the reference speed defined as the speed at which th
24、e tyre can carry the load corresponding to its load index under the specified service conditions. The reference speed for tyre load identification of industrial tyres shall be 25 km/h, i.e. speed symbol A5. D or “” (a dash) for diagonal construction; R for radial ply construction. Nominal rim diamet
25、er code Nominal rim diameter, Dr mm 4 6 8 9 10 12 15 102 152 203 229 254 305 381 Load indexSpeed symbol Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:40:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.5.2:1994 2 BSI 10-1999 Table 2 Correlation betw
26、een load index (LI) and tyre load-carrying capacity (TLCC) LITLCCLITLCCLITLCCLITLCCLITLCC kgkgkgkgkg 40 41 42 43 44 45 46 47 48 49 140 145 150 155 160 165 170 175 180 185 80 81 82 83 84 85 86 87 88 89 450 462 475 487 500 515 530 545 560 580 120 121 122 123 124 125 126 127 128 129 1 400 1 450 1 500 1
27、 550 1 600 1 650 1 700 1 750 1 800 1 850 160 161 162 163 164 165 166 167 168 169 4 500 4 625 4 750 4 875 5 000 5 150 5 300 5 450 5 600 5 800 200 201 202 203 204 205 206 207 208 209 14 000 14 500 15 000 15 500 16 000 16 500 17 000 17 500 18 000 18 500 50 51 52 53 54 55 56 57 58 59 190 195 200 206 212
28、 218 224 230 236 243 90 91 92 93 94 95 96 97 98 99 600 615 630 650 670 690 710 730 750 775 130 131 132 133 134 135 136 137 138 139 1 900 1 950 2 000 2 060 2 120 2 180 2 240 2 300 2 360 2 430 170 171 172 173 174 175 176 177 178 179 6 000 6 150 6 300 6 500 6 700 6 900 7 100 7 300 7 500 7 750 210 211 2
29、12 213 214 215 216 217 218 219 19 000 19 500 20 000 20 600 21 200 21 800 22 400 23 000 23 600 24 300 60 61 62 63 64 65 66 67 68 69 250 257 265 272 280 290 300 307 315 325 100 101 102 103 104 105 106 107 108 109 800 825 850 875 900 925 950 975 1 000 1 030 140 141 142 143 144 145 146 147 148 149 2 500
30、 2 575 2 650 2 725 2 800 2 900 3 000 3 075 3 150 3 250 180 181 182 183 184 185 186 187 188 189 8 000 8 250 8 500 8 750 9 000 9 250 9 500 9 750 10 000 10 300 220 221 222 223 224 225 226 227 228 229 25 000 25 750 26 500 27 250 28 000 29 000 30 000 30 750 31 500 32 500 70 71 72 73 74 75 76 77 78 79 335
31、 345 355 365 375 387 400 412 425 437 110 111 112 113 114 115 116 117 118 119 1 060 1 090 1 120 1 150 1 180 1 215 1 250 1 285 1 320 1 360 150 151 152 153 154 155 156 157 158 159 3 350 3 450 3 550 3 650 3 750 3 875 4 000 4 125 4 250 4 375 190 191 192 193 194 195 196 197 198 199 10 600 10 900 11 200 11
32、 500 11 800 12 150 12 500 12 850 13 200 13 600 230 231 232 233 234 235 236 237 238 239 33 500 34 500 35 500 36 500 37 500 38 750 40 000 41 250 42 500 43 750 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:40:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU
33、 50-1.5.2:1994 BSI 10-19993 Table 3 Correlation between speed symbol and speed category 4.3 Other service characteristics 4.3.1 The word “TUBELESS” shall be used to characterize tyres that can be used without a tube. 4.3.2 Specific indications, if required, may be added to show for example the prefe
34、rred direction of rotation, indicated by an arrow. 5 Marking 5.1 General marking The marking shall consist of a) the designation of the dimensional and constructional characteristics; b) the designation of the service condition characteristics (load index and speed symbol); c) the designation of oth
35、er service characteristics. The location of the marking of the service condition characteristics (load index and speed symbol) shall be distinct but in the vicinity of the marking of the dimensional and constructional characteristics. No location is specified for the markings related to other servic
36、e characteristics (see 4.3.1 and 4.3.2). EXAMPLE The characteristics of a tyre with the above markings are as follows: 5.2 Maximum speed marking If the maximum speed of a tyre is less than 50 km/h, its actual maximum speed shall be marked on the tyre, for example “40 km/h max.” or “max. 40 km/h”. 6
37、Tyre dimensions The formulae-derived values for design tyre dimensions shall be rounded to the nearest millimetre. For rounding of values, see ISO 31-0, Annex B. 6.1 Calculation of “design tyre” dimensions 6.1.1 Theoretical rim width, Rth The theoretical rim width, Rth, is equal to the product of th
38、e nominal section width, SN, and the rim/section ratio, K1: Rth = K1SN For industrial tyres mounted on 5 tapered and flat base rims, K1= 0,7 applies for tyres having nominal aspect ratios (H/S from 65 to 85 inclusive. NOTE 2Other K1 values may be defined later for other tyre and rim types. 6.1.2 Des
39、ign tyre section width, S The design tyre section width, S, is the nominal section width, SN, transferred from the theoretical rim, Rth, to the measuring rim, Rm: S = SN + 0,4(Rm Rth) where Rm and Rth are expressed in millimetres. 6.1.3 Design tyre section height, H The design tyre section height, H
40、, is equal to the product of the nominal section width, SN, and the nominal aspect ratio, H/S (H/S expressed as a percentage): 6.1.4 Design tyre overall diameter, Do The design tyre overall diameter, Do, is the sum of the nominal rim diameter, Dr, plus twice the design tyre section height, H: Do = D
41、r + 2H For the values of Dr to be used, see Table 1. Speed symbol Speed category km/h A2 A3 A4 A5a A6 A7 A8 B 10 15 20 25a 30 35 40 50 a See 4.2.2. 180/65R9marking of dimensional and constructional characteristics 116 A5marking of load index and speed symbol (distinct location but in the vicinity of
42、 the preceding marking) TUBELESS location left to the discretion of the tyre manufacturer 180:nominal section width equal to 180 mm; 65:nominal aspect ratio equal to 65; R:radial ply construction; 9:nominal rim diameter code, corresponding to 229 mm; 116:load index (LI) corresponding to a tyre load
43、of 1 250 kg; A5:speed symbol corresponding to a speed category of 25 km/h; TUBELESS: tyre to be used without a tube. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:40:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.5.2:1994 4 BSI 10-1999 6.1.5 Guide
44、lines for tyre dimensions Guidelines for the design tyre dimensions are given in Table 5. 6.2 Calculation of “maximum overall tyre dimensions in service” This calculation is for use by vehicle manufacturers in designing for tyre clearance. These dimensions are to be calculated with the coefficients
45、(see Table 4) appropriate to the design tyre section width and design tyre section height. 6.2.1 Maximum overall width in service, Wmax The maximum overall width in service, Wmax, is equal to the product of the design tyre section width, S, and the appropriate coefficient, a (see Table 4): Wmax = Sa
46、 6.2.2 Maximum overall diameter in service, Do, max The maximum overall diameter in service, Do, max, is equal to the nominal rim diameter, Dr, plus twice the product of the design tyre section height, H, and the appropriate coefficient, b (see Table 4): Do, max = Dr + 2Hb Table 4 Coefficients for c
47、alculation of maximum overall tyre dimensions in service 7 Design tyre dimensions The relevant dimensions for the recommended metric series of industrial tyre nominal tyre section width, measuring rim width, design tyre section width and design tyre section height for tyres of nominal aspect ratios
48、65 to 85 are shown in Table 5. 8 Tyre size combinations The recommended combinations of nominal section widths and rim diameters for metric series of industrial tyres are shown in Table 6. 9 Method of measurement of tyre dimensions Before being measured, the tyre shall be mounted on its measuring ri
49、m, inflated to the recommended pressure, and allowed to stand for a minimum of 24 h at normal room temperature, after which the inflation pressure shall be readjusted to the original value. Table 5 Tyre dimensional guidelines Tyre construction Construction code Nominal aspect ratio Coefficients H/Sab Diagonal Radial D or “” R 65 to 851,081,08 Nominal section width Measuring rim width code Design tyre dimensions, mm SNSection widthSection height, H, at nominal aspect ratios H/S (%) mmS8580757065 1002.5988580757065 1103.25112