Bsi bs au 050 4 7 1 1992 (iso 5995 2 1988) scan

BRITISH STANDARD AUTOMOBILE SERIES BSAU50: m : Subsection a 1991 I S 5995-2 Tyres and wheels 988 TW- 6H pages Part Rim profiles and dimensions Section Moped rims Subsection S pecification for moped rims e O a \ : : BSI BS*AU*SO: PT4 BS AU : S UBS E C* * L 91 L b b b L9 Y9 50 : Part : Subsection : 1991 National foreword AU 50, prepared under the direction of the Automobile Standards Policy Committee, is identical with IS0 5996-2 1988 ‘Moped tyres and rims - Part Rims’, published by the International Organization for Standardization (ISO) The corresponding tyre details are dealt with in Part (Subsection i) Other Parts of the standard are: Part Tyres Part Wheels and rims Part3 Valves Part of BS AU 50 (covering rim profiles and dimensions) has been introduced to assist cross-referencing between tyre specifications and the corresponding specifications Subsections of Part will partially supersede the information contained in BS AU 50 Part Section lb 1980 which has been amended accordingly This Subsection of this Part of BS : : ri m : : : Cross-references Internationalstandard Corresponding B ritish Standard BS AU 50 Tyres and wheels Part Tyres Section Moped tyres IS0 5995-1 1982 Subsection 7.1 1989 Specification for tyre designations, dimensions and load ratings (Identical) Part Rim profiles and dimensions Section Motorcycle IS0 6054-2 1990 Subsection 6.3 1991 Specification for code designated series (diameter codes to 12) rims (Identical) The %chnical Committee has reviewed the provisions of IS0 3911 and IS0 4249-3, to which reference is made in the text, and has decided that they are acceptable for use in conjunction With this standard : : : : ri m s Compliance with a British Standard does not of itself confer immunity from legal obligations - * B S I BS*AU *SO: PT4 91 :SUBSEC*7.3 B S AU = 50 : Lb24bb9 ~ 0273950 ~ Part ~~ ~ ~ ~~ m ~ : Subsection : 1991 Contents Page Inside front cover Back page National foreword Committees responsible Specification 6 e Scope Normative references General Designation and marking Rimcontours Rimdiameters Permitted rim widths Annexes A B Permitted rim width codes for tyres used on mopeds and small cubic capacity motorcycles designed for a maximum speed of 100 km/h Methods for measuring and gauging moped dimensions ri m ables A B Dimensions of tapered bead seat (straight side) Specified diameters and measuring diameters Permitted rim width codes (moped tyres) Permitted rim width codes %De widths for moped rims rims ri m ri m 3 Figures B l B.2 B.3 B.4 B.5 B.6 B.7 B B.9 B 10 B 11 B 12 (straight side) Contour of tapered bead seat Rim dimensions Rim measurement ?ape details ?ape mandrel Vernier gauge mm graduation) Vernier gauge details for measuring principle for flange height, G Use of vernier with spacer Measuring principle of dimension L1 Calliper vernier for measuring dimension LI Measuring principle of bead seat angle B 'Ibo1 for measuring angle Calliper vernier for measuring widths ri m s (1 /20 ß rim 6 7 8 9 9 10 ~ I S 5995-2 : 988 (E) I N TERNATI ON AL STANDARD M o p e d Lyres an d ri m s - Part : Rims O Scope Ti-,,- part of I 5995 saecifies L .e dimensions of taaereec -ea( General R i m tou r seat ri m s (strai gh t s i d e i f o r m oped tyres I t applies t o th ose ri m contou r dimensions necessary fo r tyre m oun ti ng an d fi tti n g of th e tyre t o th e rim, terms fo r wh i ch are used i n accordance w i t h IS0 Th e ri m o n th e side of th e tyre shall have a sm ooth contou r free of sharp edges, 391 Annex A provi des details o n perm i tted ri m wi d th codes fo r tyres used o n mopeds an d small cu bi c capaci ty m otorcycl es designed fo r a m axi m u m speed of 00 km /h Ann ex B presents m eth ods fo r measuring an d gau gi ng dimensions of tapered bead seat ri m s fo r mopeds NOTE - Tyre designation, dimensions an d l oad rati n g s are g i ven i n I S 5995-1 R i m va l ve h o l e Th e ri m valve h ol e shall be centred o n th e bo tto m of th e ri m wel l On th e tyre side, th e edges chamfered, wh i l e on the h u b side, shall be rou nded or th e edges shall be free of bu rrs wh i ch cou l d damage th e valve 3 D efi n i ti o n of H1 a n d L Hl represents th e u n obstru cted depth above th e ri m base, wi t h th e ri m tape fiftted t o perm i t fi tti n g of th e tyre L I represents th e wel l wi d th above th e ri m tape N orm ati ve references The fol l owi n g standards tai n reference i n th i s text, IS0 5995 consti tu te provi si ons which, provi si ons of A t th e ti m e of pu bl i cati on, th i s Desi g nati on an d m arki n g th rou g h part of th e edi ti on s i n di cated Th e ri rn shall be designated by i ts nom i n al diameter code and n om i n al wi d th (for example 18 x 30, 5) were valid Al l standards are su bj ect t o revision, and parties t o agreements based on th i s part of IS0 5995 are encouraged t o i nvesti gate th e possi bi l i ty of appl yi ng th e m ost recen t edi ti ons of th e standards l i sted bel ow Members of IEC and IS0 m n- tai n registers of cu rrentl y val i d I n tern ati onal Standards I S 391 : 19n, Wheels/rims - Nomenclature, designation, marking and units of measurement IS0 4249-3: 1986, Motorcycle tyres and rims (Code-designated series) - Parì3: Rims IS0 5995-1 : 1982, Moped tyres and rims - Part I : Tyres Motorcycle tyres and rims (diameter codes to 12) - scooter type - ~ art 2:Rims I S 6054-2: 986, Rim contou rs Dimensions an d tolerances of tapered bead seat ri m s are gi ven i n tabl e Ri m di ameters N om i n al ri m diameter codes, speci fi ed ri m diameters and measuring ri rn diameters are gi ven in tabl e Perm i tted ri m wi d th s Th e perm i tted ri m wi d th codes fo r m oped tyres are gi ven i n tabl e B I S 5995-2 : S I B S * AU * S O: P T4 : SU BS E C *7 m 3 b b m !I 988 ( E ) A - I Figure Tabl e - Contou r of tapered bead seat rims (strai g h t side) - Di men si ons of tapered bead seat rims (strai g h t side) D i m en si on s G Nominal ri m A wi d th cod e _ ) 2) _ _ 30,5 30,5 3,5 34 34 38 38 _ R2 R4 R 3,5 3, 4,5 1 0, 5 2,5 2,5 rn i n m ax 2,s 4,5 4,5 ,5 3,5 ~~ d i am eters Di m en si on H I L1 rn i n 3, s ati s facto ry f i t t i n g 7.5 _ o b j e cti ve - 27 For r i m H11 m i l l i m e tre s + 0,5 + n _ P i n in of l ess th an or co n j u n cti o n th e tyre Th e eq u al wi th to 400 mm, i n crease th e d i m e n s i o n L.1 actu al wel l d e p th d efi n es of th e th e d e p th HI, , , , i n u n o b s tru cte d r i m sh al l by mm space be d e te rm i n e d at above th e ri m th e n i ppl e heads, wi th th e m an u factu re r' s d i s cre ti o n i n tape fi tte d ord er t o to pe rm i t ach i eve th i s T 0273953 IS0 Tabl e - 5995-2 988 (E ) Speci fi ed ri m di ameters an d measu ri ng ri m d i ameters Dimensions i n m i l l i m etres Speci fi ed ri m M easu ri n g ri m d i am eter d i am eter’ ) 14 357.47 357,l 15 382.87 382, 16 405.97 405,6 17 433, 67 433, 18 459.07 458, 19 484, 47 484.1 21 535.27 534.9 N om i n al ri m I d i am eter code 1) Tolerance on I th e D measured bead seat I ci rcu m feren ce mm ( E x m easu ri n g ri m d i am eter) of th e r i m is Tabl e - Permi tted ri m wi d th codes (moped tyres) N om i n al secti on wi d th N om i n al ri m d i am eter code Cyl i n d ri cal Code seat ri m s WM ri m s1 ) 31 114 27 - 30, - 34 27 - 30, - 34 30, 34 3/4 1.20 27 - 30.5 112 38 - - 34 - 38 38 Di vi d ed rims21 < 10 1) See IS0 4249-3fo r detail s 2) See I S 6054-2fo r detail s 3) M T tou r wi d th codes Tapered bead > 12 Perm i tted ri r SN 112 - 38 1.20 - 1.35 20 - 1.35 - 20 - 1.35 - 50 - 1.60 1.35 - 1.50 - 60 - 185 1.50 - 1.60 - 1.85 50 Drop-cen tre rims21 1.50 - 1.75 503) 75 - 2.10 853) - 153) - 853) - 50 - BSI IS0 s - : I 988 BS*AU *SO: PT4 : SU BSEC*7-3 W b b b 9 W (EI An n ex A ti ve) ( i n fo rm a Perm i tted ri m wi d t h cod es for tyres u sed on mopeds an d sm al l cu bi c capaci ty m otorcycl es d esi g n ed for a m axi m u m speed of 00 k m / h N OTE - I S 5995-1 g i ves further information on moped tyres N om i n al section wi d t h SN Perm i tted ri m wi d t h codes - Cyl i ndri cal ri m s Cod e 2 114 112 31 3 il4 20 - 35 20 - 35 - 50 - 60 35 - 50 - 60 - 85 -50 - 60 - 85 60 - 85 - 85') - 5') BS I BS* AU* SO: PT4 : S UBS E C * - L Lb2 6 7 5 ~~ M ~~ ~ I S 5995-2 : 988 ~ (E) An n ex B (i n form ati ve) M eth o d s for m easu ri n g an d g au g i n g m oped ri m d i m en si on s B.l B Scope This annex defines methods of measuring and gau g i ng dimen- Ri m dimension m easu rem en ts B G en era l sions of tapered bead ri m s fo r mopeds Al l measurements sh al l be made on rims ready for tyre m ou n tStandardi zati on of ri m dimensions applies on l y to those - i n g and placed on fl at surfaces For accurate measurements, tou r dimensions necessary for tyre m ou n ti n g and th e fi tm e n t of gauge and tapes shall always be set perpendicular to th e ri m th e tyre to th e ri m flanges on bo th bead seats B.2.2 M a i n r i m d i m e n s i o n s t o be m e a s u re d an d g au g ed The main ri m dimensions wh i ch shall be measured and gauged are i n di cated i n fi g u re B A c t Q A Speci fi ed ri m wi d th L.1 Wel l wi d th above ri m tape (al Ci rcu m feren ce measuring po i n t o n th e tyre bead seat = mm Bead se atwi d th D p Speci fi ed ri m diameter Rg Flange rad i u s R3 Bead seat radius D1 G Hi M easu ri n g ri m diameter Flange h ei g h t U n obstru cted deoth above ri rn base wi th ri rn taoe fi tte d t o oerm i t tyre fi tm e n t Fi g u re B l - R4 B radius top Bead seat angle Ri m di m en si on s BSI IS0 5995-2 B : : S UBS E C* - BS*AU *50: PT4 and bead seat ci rcu mferen ce Ch eck ( g au g e ) th e pl ate, wi th tape o n th e appro pri ate m an d rel an d su rface t h e tape fl at bead seats eq u al l y, Fi rst m eth od Th e th e Th e ri m m easu rem en t cu m feren ce i l l u s trate d co rre ct m arked rel ated i n fi g u re tape fo r wi th d i am eter Th e to th e d etai l s is is ri m of made aro u n d m an d rel used, to ri m stan d ard A ci rcu m feren ce care be a be i n g taken m easu red wi d t h co d e referen ce tem pe ratu re sh al l Th e an d be 20 to l evel tape tape sh al l n o m i n al s trai g h t of en d Th e tape sh al l Tape th e wi d th s tape sh al l sh al l c o n t ac t th e co n tact th e o th e r en d Tape L B wi t h i n as be ri m 'T l en g th , bo th n o tch I t i s recom m en d ed th at, t wo h ol d i n g on - perso n s th e th e are tape ends, th e except f o r n eed ed po s i ti o n o th e r to experi en ced ri m m ake th e an d appl yi n g taki n g th e i n specto rs, m easu rem en t n o t m o re th an - 50 N on e pu l l read i n g s Rim measurement D i m en si on s ri m o n be i n d i cate d i n tabl e ci r- ch o ose th e Figure , I Figure - Tape detai l s W 988 ( E ) Meth od s of measuring specified di ameter B 3.1 bb9 = i n m i l l i m e tre s I I IS0 5995-2 1988 (E) O Table B.l - Tape widths for moped rims rect protusion is used (1,5 rnrn for moped rims) Calculate the averages of the two flange heights GAand GB(seefigure Calculate the measured circumferences ü A and by the following equations: U1 A = UOA -2 n GA Dimensions in millimetres B.6) u, , 35 B.3.2 Second method Measure the circumference of the upper part of both flanges by means of an inextensible steel tape-line (10 rnm width, and 0,3 mm thickness with 0,5 mm graduations) taking care that it contacts the rim Record the two measurements UoAand Uos Using an appropriate vernier gauge, as illustrated in figure 6.5, measure the height of both flanges in at least four points equally spaced around the circumference, taking care that the cor- = UOB -2 R GB NOTE - When rims have a difference of more than mm between the two outer circumferences U,, and Uoa,the vernier gauge should be appropriately applied and a spacer with a thickness, catering for the difference in circumference t, I = I - %A n should be interposed between the top of the shorter flange and the vernier gauge (see figure 8.7) Dimensions in millimetres ) Surface roughness value at the discretion the person checking NOTE - Tolerance on D, measurement is -8,% of Figure B.4 - Tape mandrel Dimensions in millimetres I+ Figure B.5 - Vernier gauge (1/20 mm graduation) BSI BS*AU*SO: PT4 : SUBSEC*7 91 W Lb2 669 9 Di m en si on s i n m i l l i m etres Fi gu re B - Vern i er g aug e d etai l s f o r measu ri ng pri n ci pl e f o r fl an g e h ei g h t, G O Spacer Fi gu re - Use of verni er wi t h spacer a o B 3 Wel l wi d th a b o v e ri m t a p e , The wel l wi d th above th e ri m tape, sh own i n fi g u re L I , L I shall be measured i n accordance wi th th e pri nci pl e demonstrated i n fi g u re B.8 and th e to o l B LI P L Figure B 8 - M easu ri n g pri n ci pl e o f di mensi on B ea d seat an g l e, LI Fi gu re B - I Call i per verni er for measu ring di mensi on L , p The bead seat angle, ß, shall be measured i n accordance wi th th e pri n ci pl e dem onstrated i n fi g u re B.1 and th e to o l sh own i n fi g u re B l l (See also th e note i n 2.) Di m ensi on s Figure an g l e ß Fi gu re B l l - in mi l l i metres Tool for m easu ri n g an g l e ß BSI BS*AU*50: PT4 IS0 : SUBSEC*? L 91 œ Lb2 Ybb9 5995-2 : 1988 ( E ) B.3.5 Oth er ri m d i m en si on s R i m wi d th Th e ri m wi d th at th e bead seat, A l, and th e speci fi ed ri m wi dth , A , sh ou l d be measured wi t h a calliper vernier (see fi gu re B 2) Fi g u re - C al l i pe r ve rn i e r f o r m e as u ri n g r i m w i d t h s B R i m i n specti o n To gauge (ch eck) flange h ei gh t and wel l depth, a vernier gauge as sh own i n fi gu re B sh ou l d be used 10 027L9b0 œ ' - B S I B S * AU* : P T : S UBS E C* L 9L m Lb b b B S AU 50 Publication(s) referred to See national foreword 027L9bL _ _ _ : Part : ~~ m Subsection : 1991 B S I 50 BS AU BS*AU *SO: PT4 :SUBSEC*7.1 91 W 162 669 0271 962 O M ’ -T : Part4 : I I Subsection : C ommittees res p o ns ib le for this 1991 IS 5995-2 : B ritis h S tandard 1988 The preparation of this British Standard was entrusted by the Automobile Standards Policy Committee (AUE/-) to Echnical 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 Manufactureis’ Association Bus and Coach Council Department of Transport Reight Transport Association Institute of Road Transport Engineers (Incorporated) Motor Cycle Industry’ s Association of Great Britain Ltd Motor Industry Research Association National Tyre Distributors’ Association Retread Manufacturers’ Association Road Haulage Association Ltd Royal Automobile Club Society of Motor Manufacturers and Traders Ltd This British Standard, having been prepared under the direction of the Automobile S tandards Policy Committee, was published under the authority of the Standards Board and comes into effect on 31 January 992 A mendments i s s u e d s i n c e p u b l icatio n Amd No Date Tkxt affected O BSI 991 The foliowing BSI references relate to the work o n this standard: Committee reference AUE/4 Draft for comment 86/77796 DC ISB N O 580 20373 9201 -5-0.8k-B B S I, Park Street, TW- 6H- London W l A 2B S B S I, Linford W o o d , M i l t o n Keynes MK14 6LE AUE/$