Bsi bs au 050 2 6a 1983 (2000)

BRITISH STANDARD AUTOMOBILE SERIES BS AU 50 2 6a 1983 Superseding BS AU50 2 6 1983 Incorporating Amendment No 1 Tyres and wheels — Part 2 Wheels and rims — Section 6a Specification for road wheels man[.]

Tyres and wheels —

U C 6 9.1 3.0 2.3.0 2.6

This BritishStan ard,hav ing

b en pre ared u der the

directionof the Automo ie

Stan ards Commit e , was

publshed u der the authority

ofthe Bo rd of BSI an comes

into fect on

2 Fe ruary 1 8

© BSI 0 -2 0

The folowing BSI references

relate to the work on this

stan ard:

Commite reference AUE/4

Draft for comment8 /79 3 DC

ISBN 0 5 0 1 1 0 2

Am endm ents is ued sinc publ cation

Amd No Date of is ue Comments

19 5

Indicated b a sidel ne in the marg in

Foreword i

6.3 Protection of mag nesium aloy casting s

Fig ure 1 — Ty pical ar ang ement for the tor ional fatig ue test 3

Fig ure 2 — Ty pical ar ang ement for the ra ial fatig ue test 4

Fig ure 3 — Ty pical ar ang ement for the cornering fatig ue test 4

Fig ure 4 — Ty pical ar ang ement for the ra ial imp ct test 6

Fig ure 5 — Profi e of striker for ra ial imp ct test 6

This Section of this stand rd was prep red u der the direction of the Automobie

Stand rds Commit e As far as practica le, the requirements of the stand rd

hav e be n alg ned with the work of ISO/TC2 , Roa v ehicles,SC2 , Motor y cles,

and SC23, Mopeds, on l g ht al oy whe ls for mopeds and motor cy cles

The trend awa f om wire-spoked moped and motor cy cle whe ls to those

man factured f om lg ht aloy casting s or fa ricated f om combinations ofshe t

materials and/ or casting s has led to some u usual desig ns In some cases, spokes

hav e become few in n mber and not tang entialy inclned to the h b; larg e sp ns

of u sup orted rim hav e a peared;spokes hav e tended to become thin in relation

to lateral for es; also it is relativ ely easy for inex erienced manufacturer to

produce such whe ls For these reasons, this Section of the stand rd has be n

introduced to ensure that the qual ty is a equately control ed

Ty re, whe l, rim and v alv e requirements are g iv en in the folowing Parts and

Sections of BS AU5 :

— Pa r t 1: Tyr es;

— Se ton 0: Gener a l;

— Se ton 1: Ca r tyr es;

— Se ton 2: Commer cia l vehicle tyr es;

— Se ton 3: Off-the-r oa d tyr es;

— Se ton 4: A gr icul tur a l vehicle tyr es;

— Se ton 5: Ind ustr ia l vehicle tyr es;

— Se ton 6: Moto cycl e tyr es;

— Se ton 7: Moped tyr es;

— Se ton 8: Cod e o pr a ctc fr the stor a ge o tyr es, in er tube a nd fla ps;

— Pa r t 2: Whe l s a nd r ims;

— Se ton 0: Gener a l (includ ing ter ms a nd d efiniions, a nd constr ucton a nd

wor kma nship) ;

— Se ton 1: R im pr ofiles a nd d imensions (includ ing openings f r va lve ) ;

( withdrawn)

— Se ton 2: Spe ifica tion fr d imensions o whe l na ve a nd h b c ntr es f r

commer cia l vehicles;

— Se t on 3: Spe ifica tion fr r oa d -whe l n ts, stud s a nd bolts fr commer cia l

vehicles;

— Se t on 5: R oa d whe ls ma nufa ctur ed wholly o pa r tl y o ca st light a l loy f r

pa ss nger ca r s;

— Se ton 6: Spe ifica tion fr r oa d whe ls ma nufa ctur ed wholly o pa r tly o

l ight a l loy f r moped s a nd moto cycl es;

— Se ton 7: Cod e o pr a ct c f r the s lecton a nd ca r e o whe ls f r commer cia l

vehicles;

— Se t on 8: Cod e o pr a ctc fr the s lecton a nd ca r e o whe ls fr pa ss nger

ca r s (incl ud ing ca r a va ns a nd light tr a iler s) ;

— Pa r t 3: Va lve ;

— Se ton 1: Spe ifica tion fr va l ve d imensions;

— Se ton 2: Tyr e va lve thr ea d s5V1,5V2,6V1 a nd8V1;

— Se ton 3: Tyr e va lve thr ea d s9V1,10V2,12V1 a nd13V1;

— Se ton 4: Tyr e va lve thr ea d s8V2,10V1,1 V1,13V2,15V1,16V1,17V1,

17V2, 17V3, 19V1 a nd20V1;

— Se ton 5: Dimensions f r ISO cor e cha mber No 1 f r tyr e infla tion va lve ;

— Se ton 6: Dimensions f r ISO cor e cha mber No 2 f r tyr e infla tion va lve ;

— Se ton 7: Cod e o pr a ctc fr the s lecton a nd ca r e o tyr e infl a tion va lve

f r pa ss nger ca r s (includ ing ca r a va ns light tr a iler s) ;

— Se ton 8: Cod e o pr a ctc fr the s l ecton a nd ca r e o tyr e infla tion va l ve

f r commer cia l vehicl es;

— Pa r t 4: R im pr ofiles a nd d imensions;

— Se ton 1: Ca r r ims;

— Se ton 2: Commer cia l vehicle r ims;

— Se ton 3: Off-the-r oa d r ims;

— Se ton 4: A gr icultur a l tr a cto a nd ma chine r ims;

— Se ton 5: Ind ustr ia l vehicle r ims;

— Se ton 6: Moto cycle r ims;

— Se ton 7: Moped r ims

Certification Attention is drawn to the certification faci ities des ribed on the

inside b ck cov er of this stand rd

A British Stand rd do s not purport to include al the neces ary prov isions of a

contract User of British Stand rds are responsible for their cor ect a pl cation

Com pl anc with a British Standard do s not of itselfc nfer im munity

f om leg al obl g ations

Summ ary of pag es

This document comprises a font cov er, an inside f ont cover, p g esi to iv ,

p g es1to8, an inside b ck cov er and a b ck cover

This stand rd has be n up ated ( se copy rig ht d te) and ma hav e ha

amendments incorporated.This wi be indicated in the amendment ta le on the

inside f ont cov er

6.1 Scope

This Section of the stand rd specifies per ormance

requirements and methods of test for al whe ls

with any structural element man factured of lg ht

aloy for use on al two-whe led mopeds and motor

cy cles with or without sidecar at ached, al

thre -whe led mopeds and thre -whe led motor

cy cles hav ing an unla en weig ht ( se Roa Trafic

Act19 2: Section 19 ) of not more than25 kg

NOT 1 Re uirements for lght alo whe ls for use on

thre -whe led motor cycles hav ing an u laden weight gre ter

than2 5kg are giv n in BS AU5 -2.5

This stand rd is not a plca le to whe ls with ste l

rims and tensioned ste l wire spokes

NOT 2 The titles of the publcations refered to in this

stan ard are lsted on p g 8

6.2 Materials

Materials used for the man facture of lg ht al oy

whe ls shal comply with the material requirements

of the cur ent edition of BS AU5 -2.5

6.3 Protection ofm ag nesium al oy

casting s and finished wheels

The protectiv e treatment ag ainst cor osion shal be

a pled b the founder and/ or the whe l

man facturer All sur aces on mag nesium al oy

whe ls shal be ful y protected

6.4 Rim profi es

Rim profi es shal be selected f om and shal comply

with the cur ent edition of BS AU5 -4.6.2 or

BSAU5 -4.6.3, or BS AU5 -4.7.1; as a propriate

6.5 Tests ofcom pleted wheels

6.5.1 Desig n v l dation To comply with this

Section of this stand rd, the desig n shal be

v ald ted b test whe ls which shal demonstrate

complance with6.5.3 Any chang e in detai desig n

or material specification shal be fol owed b

rev ald tion

Rev l d tion shal folow any chang e in the

finishing sy stem which could result in chang es in

the residual sur ace stres condition

6.5.2 Preparation oftest whe ls Tests shal be

car ied out on fuly -finished whe ls representativ e

of normal production except in those cases where

permanent protectiv e coating s hav e be n a pled

which can ot be remov ed b simple chemical

proces es without d mag e to the whe ls, this

coating remov al being neces ary to permit

penetrant-dy e c ack detection to be car ied out In

these exceptional cases it shal be permis ible to test

u coated whe ls, prov ided that the whe ls hav e

u derg one the complete heat-stov ing cy cle

a pl ca le to the coating proces

6.5.3 Per orm anc requirem ents

6.5.3.1 Gener a l All whe ls man factured in

ac ord nce with this stand rd shal comply

with6.5.3.2 to6.5.3.7

6.5.3.2 Tor siona l fa tigue te t (s pa r a te whe l)

W he ls shal be subjected to the tor ional fatig ue

test des ribed in Appendix A, and shal comply with

the c iteria of ac eptance specified inA.6

6.5.3.3 R a d ia l fa tigue te t (s pa r a te whe l) W he ls

shal be subjected to the ra ial fatig ue test des ribed

in Appendix B, and shal comply with the c iteria of

ac eptance specified inB.6

6.5.3.4 Cor ner ing fa tigue te t (s pa r a te whe l)

W he ls shal be subjected to the cornering fatig ue

test des ribed in Appendix C, and shal comply with

the c iteria of ac eptance specified inC.6

6.5.3.5 R a d ia l impa ct te t W he ls shal be subjected

to the ra ial imp ct test des ribed in Appendix D,

and shal comply with the c iteria of ac eptance

specified inD.6

6.5.3.6 Lea k te t W he ls intended for use with

tubeles ty res and marked ac ording ly ( se 6.7)

shal be subjected to the leak test des ribed in

Appendix E, and shal comply with the c iterion of

ac eptance specified inE.4

6.5.3.7 Finishing systems The rim area cov ered b

the ty re, whether pol shed or not, and any other

u polshed areas, shal be protected such as to

comply with the requirements for finishing sy stems

specified in the cur ent edition of BS AU5 -2.5

It shal be the responsibi ty of the whe l

man facturer and the retaier to include with the

sale of pol shed whe ls or a v ehicle fit ed with

polshed whe ls a warning of the efects of cor osion

on polshed areas, and to make recommend tions

reg arding protection

SAFETY NOTE It is es ential that al ty res and

whe ls used for test purposes ( se 6.5.3.2 to6.5.3.7)

are not fit ed to v ehicles Howev er, they ma be used

for further la oratory tests

6.6 Docum entation

Chemical analy sis certificates and/or hot metal

sup l er ’ analy sis certificates, chemical analy sis

records, mechanical test records, heat treatment

furnace charts, dimensional records and records of

complance with the perormance requirements

specified in6.5.3 a pertaining to al whe ls shal be

retained for a minimum period of6y ear

W he ls comply ing with the requirements of this

Section of this stand rd shal be leg ibly and

permanently marked as folows:

a) the n mber of this BritishStand rd,

i.e BSAU5 :2.6

1)

and the cou try of orig in;

b) the tra emark o other means of identification

of the man facturer;

c) the siz of the whe l;

d) the ma imum static whe l loa ( i kg );

e) an indication that the whe l is suita le for use

with tubeles ty res, if a pl ca le, e.g “ tubeles ”;

f) the v ehicle or whe l man facturer ’ p rt

n mber;

g ) an indication of the d te of production of the

whe l

The marking s in a) to e) shal be v isible when the

whe l is fit ed with a ty re

1)

Marking BS AU5 :2.6 on or in relation to a prod ct is a claim b the man facturer that the prod ct has b en man factured in

acordance with the re uirements of the stan ard.The ac uracy of such a claim is therefore solely the man facturer’s

resp nsibi ty Enquiries as to the a aia i ty of third p rty certification to sup ort such claims should b ad res ed to the

Director, Qualty Assurance Division, BSI, Ma lan s Aven e, Hemel Hempste d, Herts HP24SQ in the case of certification

marks administered b BSI or to the a pro riate authority for other certification marks

Appendix A Torsional fatig ue test

A.1 Test equipm ent

The test machine shal be one with a means to

imp rt an alternating tor ional loa ing to a h b

a out the a is of the whe l and in relation to the

rim A suita le form of machine is shown in

Fig ure 1

A.2 Pro edure

Securely clamp the whe l b a rim flang e or both

flang es to a sup orting face, and a ply tor ional

loa ing throug h a torque arm or two torque arms

at ached to the h b b a means representativ e of

that used to at ach the braking member or driv e

member to the h b on the v ehicle Assemble any

bolts or fastening s throug h the hub and tig hten

them at the beg in ing of the test using the

procedure specified b the v ehicle and/or whe l

man facturer Ensure that the mating suraces are

f e of exces iv e bui d-up of p int, dirt, or foreig n

mat er

Apply the tang ential for e acting on the torque arm

at a ra ius equal to the static la en ra ius of the

larg est recommended ty re for the rim and on an a is

coinciding with the centre- ine of the rim

A.3 Test torque determ ination

The test torque shal be determined as fol ows:

T=F× K

t

×R×9.81

where

A.4 Tor iona l test duration

The duration of test shal be10 0 0cy cles with±T

a pl ed

A.5 Accuracy of appled torque

The a pl ed torque, as determined b a suita le

means of calbration shal be ac urate to

within±5% of its nominal v alue throug hout each

test cy cle

A.6 Criteria of ac eptanc

At completion of the test, there shal be no ev idence

of fatig ue c acks ( as indicated b a penetrant-dy e

test) deformation or faiure ( i cluding lo senes ) of

mechanical fastening s

Appendix B Radial fatig ue test

B.1 Test equipm ent

The test machine shal be one with a means to

imp rt a constant ra ial for e which rotates with

respect to the whe l A suita le form of machine is

shown in Figure 2, in which the whe l equip ed

with a ty re is loa ed ra ialy ag ainst a rotating

drum The drum should be as larg e as practica le,

the minimum diameter shal be1.7 8m

Fig ure 1 — Ty ical ar ang em ent for the

tor ional fatig ue test

T is the test torque ( in N·m);

F is the ma imum static whe l loa ing ( in kg ),

[ se 6.7 d)]

K

t

is a test factor taken as1.0;

R is the static rol ng ra ius ( i m) of the

larg est diameter ty re specified for the rim in

BS AU5 -1.6

B.2 Pro edure

Use the siz of ty re for the test whe l as specified in

the a propriate Subsection of BS AU 5 -1.6 or

BSAU 5 -1.7 for the p rticular rim siz u der test

or as recommended b the v ehicle manufacturer

Use a cold inflation pres ure equal to the ma imum

v alue marked on the ty re b the ty re man facturer

Mou t the whe l on a spindle and bearing s

representativ e of those used on the v ehicle

B.3 Test forc determ ination

The test for e shal be determined as folows:

F

r

=F×K

r

×9.81

where

B.4 Ra ial test duration

The duration of test shal be5 00 0cy cles with F

r

a pled

B.5 Accuracy of a pl ed forc

The a pl ed test for e, as determined b a suita le

means of calbration, shal be ac urate to

within±5% of its nominal v alue throug hout each

rotational cy cle

B.6 Criteria of ac eptanc

At completion of the test, there shal be no ev idence

of fatig ue c acks ( as indicated b a penetrant-dy e

test) deformation or fai ure ( including lo senes ) of

mechanical fastening s

Appendix C Cornering fatig ue test

C.1 Test equipm ent

The test machine shal be one in which a constant

rotating bending moment is a pl ed to a whe l

throug h the centre member, the rotation being

a out the ax is of the whe l A suita le form of

machine is shown in Figure 3

C.2 Pro edure

Attach the loa arm and a a tor as embly to the

whe l h b b the normal bearing locations and any

ex isting bolt holes in the h b No modification of the

whe l h b is permit ed Assemble and tig hten any

bolts or fastening sthroug h the h b at the beg in ing

of the test using the procedure specified b the

v ehicle and/ or whe l manufacturer Ensure that the

mating suraces of the test a a tor and whe l is fe

of exces iv e bui d-up of p int, dirt, or foreig n

mat er

C.3 Bending mom ent determ ination

The bending moment shal be determined as

folows:

M=F×K

b

×È ×R× 9.81

where

Fig ure 2 — Ty ical ar ang ement for the

ra ialfatig ue test

F

r

is the ra ial test for e ( i N);

F is the ma imum static whe l loa ing ( in kg ),

[ se 6.7 d)]

K

r

is a test factor taken as2.25

Fig ure 3 — Typical ar ang em ent for the

c rnering fatig ue test

M is the test bending moment ( in N·m);

F is the ma imum static whe l loa ing ( in

kg ), [ se 6.7 d)]

K

b

is a test factor taken as0.7;

È is the co ficient of fiction dev eloped

betwe n the ty re and the roa and is taken

as0.7 for the purpose of this test;