Bsi bs au 050 1 4 6 1996 (iso 7867 2 1996) scan

BRITISH STANDARD AUTOMOBILE SERIES BS AU 50 Part Subsection 4.6 1996 IS0 7867-2 1996 : : : vres and wheels Part '&res Section Agricultural tractor and machine tyres Subsection 4.6 Specification for service description and load ratings for metric series tyres ICs 43.040.60; 83.160.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW : BS AU 60 : Part : Subsection 4.6 : 996 C o m m i tte e s resp onsib le fo r th i s B ritish S tandard The preparation of this British Standard was entrusted to Technical Committee AW4, w s and wheels for motor vehicles, upon which the following bodies were represented: Agricultural Engineers’ Association Automobile Association British Industriai h c k Association British Pressure Gauge Manufactums’ Association British Rubber Manufacturem’ Association Confederation of Passenger “bnsport UK Deparhnent of ’ Ransport Fi-eght ’ Ransport Association Institute of Road ’ Ransport Engineem (Inc) Motor Cycle Industry’ s Association of Great Britain LM Motor Industry Research A s s o c i o n National Q re Distributom’ Association Retread Manufac turers ’ Association Road Haulage Association Ltd Society of Motor Manufacturers and M e r s This British standard, having been prepared under the Engineering direction of the Board, was pubiished the authority of the Standards Board and comes into effect on sector under 15 October 1996 Q BSI 1996 A m endments is s ued s in ce p ub lication Date AmdNo Text The foüowing BSI references relate to the standard: Committee work on this reference AUW4 Draft for comment 94~703 50 DC IS B N O 580 26059 _ _ I I affected Ltd BS A U 60 : Part : Subsection 4.6 : 1996 Contents page Inside front cover Committees responsible National foreword ii S pecification scope Normativereferences Dennitions Servicedescription 6 ~loadi-dtings Reference intlation ~ressures A nnexes tyre loads A @ formative) Basic B (informative) Bibliography Tables Load indices (LI) and tyre loadcanyin gcapacities(TLCC) Speed symbol and reference speed 3 Lodspeedrelationship A.l Load per A.4 - A.6 Load per tyre at A.2 A.3 m * tyre at reference speed A2 and inflation pressure - ‘95’ series tyres for special cuitivation work Load per tyre at reference speed A8 and inflation pressure - ‘80’ series tyres tractor * Load per tyre at reference speed A8 and inflation pressure - ‘75’series Load per tyre at reference speed A8 and inflation pressure - ‘70’ series tyres me reference speed A8 and inflation pressure - ‘65’series 5 ~~ O BSI 996 i BS A U 60 : Part : Subsection 4.6 : 996 National foreword 50 has been prepared by Technical Committee A W and is This Subsection of BS AU I S 7867-2 identical to and : 1996 @w.ỗ and ri m s ( m t & machines - Part : s e rvic e íiescriptwn and series) for agriculEuml tractors load ratings, published by the I n k d o r d Organization for Standardization (ISO) BS AU 50 is published in four P a r k Partl Qln?s Part wheels and rims Part3 valves Part Rim profiles and di-ns I S 7867 specifies requirements for metric series and rim s for agricultural tsactors and machines and I S 8664 specifies requirements for agricultural tractor tyres drivewheel tyres Cross-references Pub licatio n r e fe r r e d to Corresponding B ri ti s h S tandard Bs AU 50 @w.ỗ and wheels Partl@ w ỗ Section A gricu l tu ml Cmctor and IS 7867-1 : 1996 Subsection 4.5a : machine tyres 1996 Speafication for designations, dim en s io n s , marking and t @ ! m coordin ationfor mei9-k series tyres (identical) Part Rim profiles and d I S 425 i Section Ag ri cu l tu ral tractor and : 1994 Subsection l a se?-ìỈs rims : e machine rims 1995 Spm ificatù m for ply-rating marked (identicai) Committee has reviewed the provisions of IS0 42231 , to which and has decided that they are acceptable for use in conj unction with this stanàard Compliance with a B ritish Standard does not of itself confer immunity The T e c hni d nonnative reference is made in the from legai obligations text, ~~ ~~ ~ BS I BS* AU* SQ: P TL : S UBS EC* -b 1624669 0564 12 96 BS AU 60 : Part 520 U : Subsection 4.6 : 996 Tyres and ri m s (m etri c series) for ag ri cu l tu ral tractors and machines - Part 2: Service d escri pti on an d l oad rati n g s Definitions of some terms used in the tyre industry - Part 7: Pneumatic tyres I S 4223-1 : 989, Scope This part of IS0 7867 establishes th e service descrip- tion, th e tyre load rati n g s i n basic and special applications and reference i n fl ati on pressure in crem ents - for th e metric series of tyres primarily intended for agricultural tractors and machines _ I II II _ E _ * Co* I t applies to bias-belted, diagonal and radial tyres mounted on 5" tapered rims, as specified in I S 4251 -3 I t also applies to di fferen t cepts and types of tyres IS0 4251 -3:1 994, Tyres (ply rating marked series) and rims for agricultural tractors and machines - Part 3: Rims I S 7867-1 :1 996, Tyres and rims (metric series) for agricultural tractors and machines - Part 7: Tyre designation, dimensions, marking and tyre/rim coordination and rims; in th ese cases, however, appropriate load/ speed-curves and reference i n fl ati on pressure in- crements wi l l be established and added Basic tyre l oadcarrying capacities for ranges of exi st- Definitions ing tyres are given i n annex A For the purposes of th i s part of NOTE Designation and marking of the metric series i s n i ti on s given i n defined in I S 7867-1 Code (ply rating) marked series of IS0 4223-1 IS0 7867, the defi- and I S 7867-1 apply tyres and rims for agricultural tractors and machines are specified in I S 4251 -1 , I S 4251 -2 and I S 4251 -5 Servi ce description (load index - speed symbol) marking of existing series of agricultural tractordrive-wheel tyres is given in I S 8664 Service description The service d escri pti on shall be indicated as fol l ows: The Load index Normati ve references foll owi ng standards contain provisions which , throu gh reference i n th i s text, sti tu te provisions of 4.1 Speed sym bol Load index th i s part of I S 7867 At the ti m e of publication, the editions indicated were valid All standards are su bject The load index is a numerical code associated wi th a to revision, and parties to agreem ents based on th i s maxi mu m load a tyre can carry a t the speed indicated part of I S 7867 are encouraged to i n vesti g ate th e by i ts speed sym bol under service conditions speci- possibility of applying th e most recent edi ti on s of th e fi ed by th e tyre manufacturer standards indicated below Members of I EC and IS0 maintain reg i sters of currently valid I nternational Stan- The correlation between load indices and tyre load- dards carrying capacities shall be as given in table ßSH BS AU 80 : B S * AU * S O : P TL Part : : S U B S E C * b Subsection 4.6 : L b b b ỵ 42 3 m 996 Tabl e - Load indices (LI) and tyre load -carryi ng capacities (TLCC) TLCC U U ncc LI TLCC LI kg kg TLCC LI kg kg O 45 40 40 80 450 20 400 60 500 46.2 41 45 81 462 21 450 61 625 47.5 42 50 82 47 22 500 62 75 48.7 43 55 83 487 23 550 63 875 50 60 84 500 24 600 64 5 51 45 65 85 51 25 650 65 53 46 70 86 530 26 70 66 300 54.5 47 75 87 545 27 75 67 450 56 48 80 88 560 28 80 68 600 58 49 85 89 580 29 85 69 800 44 O00 50 O00 60 50 90 90 600 30 900 70 1 61 , 51 95 91 61 31 950 71 50 63 52 200 92 630 32 72 300 65 53 93 65 33 060 73 500 67 54 206 21 94 670 34 20 74 700 69 55 21 95 690 35 80 75 900 71 56 224 96 71 O 36 240 76 00 73 57 230 97 73 37 300 77 300 75 58 236 98 75 38 360 78 500 77 59 243 99 775 39 430 79 750 20 80 60 250 800 40 500 80 21 82 61 257 o1 825 41 81 22 85 62 265 02 85 42 650 82 500 23 87 63 272 03 875 43 72 83 750 24 90 64 280 04 900 44 800 84 25 92, 65 290 05 925 45 900 85 26 95 66 300 06 950 46 86 500 27 97.5 307 07 975 075 87 750 O0 28 O0 67 68 31 08 29 03 69 325 o9 30 06 70 335 1 31 o9 71 345 1 32 1 72 355 1 1 33 1 73 365 1 34 1 74 375 1 O00 O00 250 O00 250 O00 48 50 88 030 49 250 89 300 060 50 3 50 90 600 O90 51 45 91 o 900 52 550 92 200 1 53 650 93 500 1 80 54 94 800 35 21 75 387 1 1 25 76 400 1 37 28 77 41 1 38 32 78 425 1 39 36 79 437 1 Speed symbol 575 47 36 4.2 O00 750 O00 55 75 95 50 250 56 96 500 285 57 25 97 850 320 58 250 98 200 360 59 375 99 600 Load fo r d u al tyre s O00 eq u al s ,76 ti m e s th e l oad fo r a si n g l e tyre The speed wh i c h i ndex th e s ym bo l tyre u n d er a is can sym bo l carry servi ce a i n d i cati n g l oad co n d i ti on s th e speed correspon d i n g s pe ci fi e d by to th e at i ts tyre For basi c tyre loads fo r ran g es of e xi s ti n g tyres, see annex A m an u factu rer The correl ati on b e t we e n en ce speed s sh al l be as speed g i ven sym bo l s i n tabl e and re fe r- 5.2 Tyre applications other than a t reference speed Tyre load rati ngs appl i cati on s For i n cl u d i n g 5.1 Basic tyre loads Basi c tyre cated by l oad th e is th e tyre ' s tyre l oad i n d i cated b y t h e tyre ' s g i ven l o ad carryi n g i n d ex at th e speed sym bol capaci ty referen ce indi - speed The fo r road wi t h o u t tran sport, high th e and su stai n ed l oad /speed torq u es, rel ati on sh i p is i n tabl e tyre th e m an u factu rer actu al pressu re cern ed to be l oad /speed rel ati o n sh i p g i ven u sed sh al l wh e n i n tabl e be co n s u l te d appl yi n g th e BS The rim/wheel manufacturer shall be consulted for confirmation of the strength of the rimiwheel for the intended service Tabl e - Speed sym bol an d reference speed Reference speed kmh S p e d symbol 10 15 A3 20 A4 25 A5 30 A6 35 A7 A8 50 B NOTE - This list of speed symbols is not restrictive; other cat egories may be determined later Recommended speed symbol for tyres for agricultural trac tors and machines Al A2 40 1) 5.3 AU 50 : Part : Subsection 4.6 : 1996 l y r e application on combine harvesters (A8 tyres only) On combine harvesters in cyclic loading application, except hillside combines, a load of up to 70 % of the basic tyre loads is permitted for speeds up to km/h with an inflation pressure increase of approximately 30 %, in consultation with the tyre manufacturer This load increase shall include 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 (as for instance when grain tanks are empty during transport) the loads in table apply For hill-side operations over 11' (22 %) slope, only the basic tyre loads are permitted The rim and wheel manufacturer shall be consulted concerning the strength of the wheels 1) Tabl e - Load /speed rel ation sh i p Maximum tyre load S p d ~ Tyros with s p d k m /h 10 15 20 25 30 35 Tyr- A2 (1 O km/h reference symbol O0 94 wi th sped kmh reference symbol AS speed) 1) (40 I 89 84 80 76 - speed) 50 34 23 111 07 103 O0 2) 45 50 i Expressed as percentage of the basic; tyre loads This also appl ?s for all field appiicatiO with high and sustained torques 40 2) 73 96 91 Ins Reference i nfl ati on pressures The following reference inflation pressures are recommended for basic tyre loads of different ranges of tyres (metric series) for agricultural tractors and machines 00 kPa 20 kPa 40 kPa 160 kPa 200 kPa 240 kPa 280 kPa 320 kPa 360 kPa 400 kPa 440 kPa NOTE These reference inflation pressures are for basic tyre loads of different ranges of metric agricultural tyres Operating pressures may be different BS I BS*AU*SO: PTL : SUBSEC*4 b 96 BS AU 50 : Part : Subsection 4.6 : Lb2 bb9 64 015 W 996 Annex A (i n form ati ve) Basic tyre loads A.1 This annex gives i n form ati on additional t o 5.1 A.2 Load indices and basic tyre loads for ranges of exi sti n g tyres are given in tables A l t o A Table A l - Load per tyre at reference speed A2 and inflati on pressure - "95" series tractor tyres for special cu ltivati on work Load index Tyre ri re designation I Reference inflation pressurel) kg kPa 801 95 R40 21 01 95 R 44 24 40 30 900 R 4 32 R 48 34 20 R48 40 500 R 36 41 575 R 44 45 900 R 48 47 075 R 48 53 650 57 25 R 230/95 270/95 2301 95 270/95 11 R54 20 400 600 O00 320 440 The inflation pressure i s a minimum reference value for the loads given in the table The tyre manufacturer concerned shall be consulted sbout the actual pressures to be used in practice I Basic tyre load BS Table A.2 R4 Table A.3 Load index R 20 R2 26 R3 R 34 R34 R32 R3 R 620/75 * m* 650/75 680P5 710/75 26 R30 R 34 R 620/75 Il : Subsection : 996 145 Basic tyre load Reference inflation prossurel) kg kPa 900 60 I - Load per tyre at reference speed A8 and inflation pressure - "75" series tyres Load index Tyro size designation 340ff5 380Iì5 Part - Load per tyre at reference speed A8 and inflation pressure - "80" series tyres Tyro size designation 420180 AU : I I I 117 121 153 155 157 162 164 168 166 168 170 Basic tyre load Reference inflation prossurel) kg kPa 285 I ~ - ~~ ~ 450 650 875 125 750 O00 600 300 600 O00 I I I 160 320 The inflation pressure is a minimum reference value for the loads given in the table The tyre manufacturer concerned shall be consulte( tbout the actual pressures to be used in practice BS AU 60 : Part Subsection 4.6 : Tabl e A.4 - Load index I R20 360P O /70 42 /70 Basic tyro load Reference inflation pressurel) kg kPa L' 1 060 20 1 1 R24 1 50 R 28 1 360 R 20 20 400 R 24 22 500 R 28 25 650 R 32 0P O 1996 Load per tyre at reference speed A8 and inflation pressure - "70" series tyres lyre size designation 0 /70 : 50 R 20 22 500 R 25 65 R 28 27 75 R 24 30 900 R28 33 060 R 34 20 30 R 34 I 38 I 60 I R 26 I 39 I 430 I R 28 20 I R3 û 480/70 40 I 500 575 41 34 43 725 R 38 45 900 R 26 43 725 R 30 45 900 R 34 48 50 38 50 350 26 45 900 R 520PO R R ~ ~ a - 1 55 R 42 58 875 250 50 620PO R2 48 /7 R3 66 300 4ûOPO 1) R28 The i n flati on pressure i s a I 51 I 500 minimum reference value for th e loads given i n the table about th e actual pressures to be used i n practice - I 320 The tyre manufacturer concerned shall be consulted BS Table A.5 - AU 50 : Part : Subsection : 996 Load per tyre at reference speed A8 and inflati on pressure - "65" series tyres l y r e site designation I Load index Basic tyro load Reference inflation pressure') L' kg kPa R 24 22 500 R 28 24 60 R 27 75 850 80 4401 65 ~~ 24 4801 65 R 28 R 24 I I 29 35 I I I ~~ 20 R 5401 65 6501 65 28 37 300 38 360 R 34 40 R R 500 38 42 650 R 28 47 075 R 38 47 075 R 38 54 56 R O00 ~~ ~ I ) The inflation pressure i s a ibout the actual pressures t o 60 750 ~ _ _ _ minimum reference value for th e loads given in the table The */re _ _ _ manufacturer concerned shall be consulted be used i n practice ~ B S I BS AU 60 : BS *AU *S O: PTL Part : S UB S E C * - b 96 I1624669 3 7b0 : Subsection 4.6 : 1996 Annex B (i n form ati ve) Bibliography I1 I IS0 4251 -1 :1 992, Tyres (ply rating marked series) and rims for agricultural tractors and machines Part 4: Tyre classification and nomenclature and rims for agricultural tractors and machines Part 1: Tyre designation and dimensions I41 [21 I31 IS0 4251 -2: 992, Tyres (ply rating marked series) and rims for agricultural tractors and machines Part 2: Tyre load ratings IS 992, Tyres fply rating marked series) [51 I S - ~ 9 , Tyres fply rating marked series) and rims for agricultural tractors and machines Part 5: Log skidder tyres IS0 8664: 992, Agricultural tractor drive-wheel tyres - Service description (load index - speed symbol) marked tyres ~ BS I BS*AU *SO: PTL :SUBSEC*4.b Yb m Lb24bbY 0564337 BS AU 60 : Part L i s t of references See national foreword * rn* ~ O BSI 1996 bT7 : Subsection 4.6 : 1996 BS I :SUBSEC*4.b BS*AU *SO: PTL m 96 62 669 4 m 533 BS AU 50 : Part : Subsection 4.6 : 1996 BSI - B ritish Standards Institution I S 7867-2 : 1996 BSI is the independent national body responsible for preparing B ritish S tandards It presents the U K view on s tandards in Europe and at the international level It is incorporated by Royal Charter C ontract requirements A B ritish S tandard does not purport to include ail the necessary provisions of a contract Users of B ritish S tandards are responsible for their correct application Revis io ns B ritish S tandards are updated by amendment or revision Us ers of B ritish S tandards should make su re It is the constant aim grateful would be that they possess the latest amendments or editions of BSI to improve the quality of our products and services W e if anyone finding an inaccuracy or ambiguity while using this B ritish S tandard would inform the S ecretary of the responsible technical committee, the identity of which can be found on the inside fi-ont cover Tel O181 01 81 996 996 9o00, Fax: 7400 BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards B uying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer S ervices, S ales Department Fax: 01 81 996 at Chiswick Tel 01 81 996 7000, 7001 In response to orders for international standards, it is BSI policy to supply the BSI that implementation of thos e have been published as B ritish S tandards, unless otherwise reques ted Information o n s tandards BSI provides a wide range of information on national, European and international s tandards through its Library, the S tandardline Database, the BSI Information Technology S ervice @TS) Information Department and its Technical Help to Exporters Service Contact the at Chiswick T e l 01 81 S ubscribing members of BSI are kept up to 996 7111; Fax: date with 01 81 996 7048 s tandards developments and receive substantial discounts on the purchase price of standards For details of these and other benefits contact Customer Services, Membership Tel 01 81 996 7002; Fax: at Chiswick O 181 996 7001 Copyright Copyright subsists in all BSI publications BSI also holds the copyright, in the UK, of the publications of the international standardization bodies Except as permitted under the copyright, Des igns and Patents Act 988 no e x b c t may be reproduced, s tored in a retrieval system or íxmsmitỵed in any form or by any means photocopying, recording or otherwise - 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