Bsi bs au 050 1 6 6b 1998 (iso 10231 1997) scan

Foreword IS0 he Internatio al Organiz tio for Stan ardiz tio is a wor ldwide federatio ofnatio alstan ards b dies S0member b d ies.. The c nt ifu al growth test as es es the maximum g

Tyres a n d wheels

-IS0 10231:1997 50-1.6.6b:1998

ICs 4 1 0 8.10.1

N C O PYING W" UT BSI P ER MI SSI ON EX E T AS P B ílTiED BY C O PYRIGHT LA

Incorp rat n

Amend ment N o 1

( ren mbe s t he BS as

BS AU 5 -1.6.63:1 9 )

Am d N o

ThisBritish Stan ard repro uc s verbatim IS0 10 31: 19 7 and implements i t

a s theUK natio al stan ard b amen ment to BS AU 50-1.6.6a:19 8,

su ersedin an ren mberin the stan ard as BS AU 50-1.6.6 :19 8

The UK paricipatio in its preparatio was ent usted to Te h ic l Commite

AUE/4, Whe ls and tyres for mot or vehicles, which hasthe resp nsibi ity t o:

- aid en uirersto u derstan thetext;

- presesnt tothe resp nsible internatio aUEuro e n commite an

en uiries o the interpretatio ,or pro osals for chan e, an ke p the UK

interests informed;

- mo itor related internatio al an Euro e n develo ments an

promulgate them intheUK

A l st o organiz tio s represented o this commite c n be o tained o

req est toits se retary

Cros -r efer enc s

The British Stan ardswhich implement internatio alor Euro e n

p bl c tio s refer ed to in this d cument may be fo n inthe BSI Stan ards

Catalo ue u der the se tio entitled ?Internatio al Stan ards Cor esp n enc

In ex?,or b y usin the ?Find ? fa i ty oftheBSI Stan ards Ele to ic

Catalo ue

A British Stan ardd es n t p rp r to inclu e al the ne es ary pr ovisio s of

a co t a t Users ofBritish Stan ards are resp nsible for their cor e t

ap lc tio

Complanc wit h a Brit ish Standa r d does not of it self confe immunit y

from legal o l g t ions

This British Stan ard, ha ing

b en pre ared un er the

dire tion ofthe Engine ring

Se tor Board , was p bl shed

un er the a thority of the

Stan ards Bo r d an c me s

into efe t on

1 Fe ru ry 199 8

0 BSI 0 -2 0

108 2

Summa r y of pa es

Thisd cument comprises a f ro t co er , an inside fro t co er , pages i an i , the

IS0 title page, pages i i to iv, pages 1 to 7 an a ba k co er

The BSI co yr ig t n t ic displayed in this d cument in ic tes when the

d cument was last is ued

Sidel nin in this d cument in ic tes themost re ent chan es b amen ment

Ju e 2 0 In ic ted b a sidel ne

ISBN O 58 291 9 3

Con te n ts

Page

INTERNATIONAL IS0

Sec n edit io n

19 7- 12-01

for verifying t yre c ap a b il t ies

PneumatÌq e p ur mtocycks - Mdthodes d'e s ip urla Ve iticarion

de I'aptitude de p eumatiq e

R efere c n mb i

IS 0 1 231:197 E1

Foreword

1

2

3

3.1

3.2

3.3

3.4

3.5

3.6

3.7

3.8

3.9

Sco e

Normative referenc

Definitio s

be d separatio

belt separatio

ch n in

cord separatio

cra kin

in erl nerseparatio

o en splc

ply separatio

sidewal separatio

3.10 t e d separatio

3.1 test rim

3.12 test drum spe d

3.1 tyre spe d

3.14 maximum load ratin

4

6 Req irements

An ex A (n rmative) En elo in curve for the co to r ofthe

tyre for the c nt ifu al growth test

An ex B (infor m at ive) Tyres suitable for spe ds o er 2 0 kdh

An ex C (informative) Biblo r ap y

Fig re A 1

Table 1 - Test parameters for en uranc

Table 2 - Inflatio pres ures for hig spe d

Table 3- Inflatio pres ures for c nt ifu al growth

Table 4 - Minimum bre kin energ

Table B.l- Initial test spe ds

Test eq ipment and its req irements

Page

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2

2

4

111

O BSI 06 2 0

11

Foreword

IS0 ( he Internatio al Organiz tio for Stan ardiz tio ) is a wor ldwide

federatio ofnatio alstan ards b dies ( S0member b d ies) The work of

preparin Internatio al Stan ards is n rmal y c r ied o t thro g IS0 te h ic l

commite s Ea h member b d y interested in a su je t for which a te h ic l

commite has be n establ shed ha s the rig t to be represented o that

commite Internatio al organiz tio s, g vernmental an n n-g vernmental,

in l aiso with ISO,also take par inthewor k IS0 colab rates closely with the

Internatio al Ele t ote h ic l Com mis io ( EC) o al mat ers of

ele tote h ic l stan ardiz tio

Draft Internatio al Stan ardsad pted b the te h ic l commite s are

circulated to themember b dies for v t in Pu l c tio a s anInternatio al

Stan ard req ires ap ro al b at le st 7 % ofthemember b dies c stin a v t e

Internatio al Standard IS0 10 3 was prepared b Te h ic l Commite

ISOíTC 3 , Ty es,rimsa d valv s, S bc mmit t ee SC 10, Cy l e, moped ,

moto c cl e tyr s a d rims

This se o d editio c nc ls an repla es the first editio ( S010 31:19 2), of

which i co stitutes a te h ic l r evisio

An ex A forms anintegral par ofthis Internatio al Stan ard.An ex B an

An ex C are for informatio o ly

For ewor d t o IS0 1023 1:1997/A md l:1999 (E)

IS0 ( he Internatio al Organiz tio for Stan ardiz tio ) is a wor ldwide

federatio ofnatio al stan ards b dies ( S0 member b d ies) The work of

preparin Internatio alStan ards is n rmaly c r ied o t thro g IS0 te h ic l

commite s Ea h member b d y interested in a su je t for which a te h ic l

commite has be n establ shed hastherig t to be represented o that

commite Internatio alorganiz tio s, g vernmental an n n-g vernmental,

in laiso with ISO, also take par inthewor k IS0 col ab rates closely with the

Internatio al Ele t ote h ic l Com mis io ( EC) o al mat ers of

ele t ote h ic l stan ardiz tio

Internatio al Stan ards are d ra fted in a cordanc with the rules given in the

ISODEC Dire tives, Part 3

Draf t Internatio al Stan ards ad pted b the te h ic l commite s are

circulated to the member b dies for v t in Pu l c tio asanInternatio al

Stan ardreq ires ap ro al b at le st 7 % ofthe member b dies c stin a v t e

Amen ment 1 toInternatio al Stan ard IS0 10 31:19 7 was prepared b

Te h ic l Commite ISO/ TC 31, Tyr s, rimsa d val ues, S bcommite SC 10,

Cy l e, moped, moto c cl e tyres a d rims

Desc ipt ors: r oad v e h icle s, motorc cl e s, tyres, pne matic tyres, tests, la oratory tests, p r for manc

tests, test equipment, testing c n it ions

8 BSI 0 6- 00 0

111

Rer od e b IH u er lc se with BI - Un ntr ole Co

1 Scope

ThisInternatio al Standard spe ifies test meth ds

for ver ifyin the c pabi ities of tyres for motorcycles

Of the test meth ds presented, o ly some may be

req ired depen in o the ty e of tyre to be tested

The tests are c r ied o t ina lab ratory u der

co t r ol ed co ditio s

I inclu es a st en thtest for as es in the

c pabi ity of the tyre st ucture,with respe t to

bre kin energ ,in thet e d are

A se o d test,the en uranc test,as es esthe

resistanc ofthetyre with respe t to ser vic at ful

load an mo erate spe d o er lo g distanc s

The third test,thehig spe d test, as es es the

c pabi ty ofthe tyre asrelated to servic at the

maximum spe d c pabi ity ofthetyre.It d es n t

ap ly totyreswith a spe d c pabi ity

be l ow 130 k m/h

The c nt ifu al growth test as es es the maximum

growth ofthetyre u der the influenc ofc nt ifu al

for ces at the maximum spe d c pabi ty of thetyre

This ap l es o ly to road tyres with spe d symb ls P

and a bo e

The test meth ds presented inthis Internatio al

Stan ard are n t inten ed for gradatio oftyre

performanc orq al ty levels

This Internatio alStan ard ap l es to al

m otorcycle tyres

2 Normat ive reference

The fol owin stan ard co tains pr ovisio s which,

thro g referenc inthis text, co stitute pr ovisio s

ofthis Internatio alStan ard.At thetime of

p bl c tio , theeditio in ic ted was vald Al

stan ards are su je t to revisio , an par ies to

agre ments based o thisInternatio alStan ard

are enco raged to in estigate the p s ibi it y of

ap lyin the most re ent editio of the stan ard

in ic ted below Members ofIECan IS0 maintain

registers ofcur ently val d Internatio al Standards

IS0 4 23-1:1989, Defini ions ofsome te ms used in

t he ty e in ustr -Part 1: Pneumat c ty es

3 Definitions

For the p rp ses ofthis International Stan ard, the

definitio s given in IS0 4 23-1 and thefolowin

definitio s ap ly

3.1

bead separat on

bre k own ofb n betwe n comp nents in the be d

are

3.2

belt separat on

par in o f ru ber comp u d betwe n belt layers or

betwe n belts and ples

3.3

chunking

bre kin away ofpie es ofthet e d

3.4

cor d separat on

cord par in from adja ent ru ber comp u ds

3.5

cr ack ing

an par in within the t e d, sidewal or in erl ner

ofthe tyre exten in to cord material

3.6

innerl ner separat on

par in of in erl nerfrom cord material in the

c rc s

3.7

o en spl c

an par in at an ju ctio oft e d,sidewal or

in erl ner that exten s to cor d material

3.8

ply separat on

par in ofru ber com po n betwe n adja ent ples

3.9

sidewal separat on

par in of the ru bercom po n from the cord

materialin the sidewal

3.10

tread separ at ion

p l in away ofthet e d from the tyre c rc s

3.1

test rim

an rim o which thetyre may be fited that

co for ms tothe dimensio s ofthe re ommen ed

rims for the par icular tyre desig atio an ty e

3.12

test drum spe d

spe d ofthe o tersurfa e ofthe ste l test drum

3.1

tyre spe d

perip eral spe d ofthet e d surfa e

3.14

maximum loa d rating

maximum load the tyre is rated to c r y at the

maximum spe d

N T Ma imum sp ed me ns the sp ed c r r esp n ing tothe

sp ed symb l o the tyre or the m aximum tyre sp ed c p bi ty

spe cifie d by the tyre manufa turer

The test eq ipment co sists ofitems in4.1to 4.5

For thetyre c nt ifu al growth test (se 5.4), the

me surement eq ipment a cura y shal be

within il % offul sca le

4.1 Test drum, cyl n ric l driven flywhe l (drum)

havin a diameter of 1,7 m * 1 % or2 m * 1 %

The surfa e ofthedrum shal be smo th ste l The

width ofthe test surfa e shal exc ed the o eral

width ofthe test tyre

For the test drum,theloadin d evic may be a

de d-weig t c nti evered system with a h draul c

system or with an othereq ivalent system The

loadin c pa ity shal be adeq ate for the

req irements ofthe proc d re and the a cur acy

shal be within * ,5 % ofthe ful sca le

For thetest drum,the spe d c pabi ty ofthe

eq ipment shall be adeq ate for hereq irements of

thetest meth ds.The a cura y ofthetest drum

spe d shal be within * % ofthe f ul sc le

4.2 Plu ge ,cyl n ric l ste l plu ger ofsuficient

len th with

a hemisp eric l en and

a diameter

of 8mm f 0,6 mm

For theplu ger eq ipment, theloadin d evic shal

be of h draul c ty e or eq ivalent system with a

maximum load c pa ity adeq ate for the

req irements ofthetest meth ds In ic tors of

displa ement an offorce shal be pr ovided with an

a cura y within k1 % offul sc le

For theplu ger eq ipment, the spe d ofthe

displa ement shal be co t ol ed with ana ccur a cy

within * % ofthef ul sc le

4.3 I nflation r s ur g u es, with a maximum

sc le value ofatle st 4 0 kPawith ana cura y

within *10 kPa

4.4 Test axl e, for thetyre c nt ifu al growth test,

thetest axle an therim shal be co t r oled in order

to ensure a radial ru -o t les than *0,5 mm an a

lateral ru -o t les thank0,5 mm when me sured

respe tively at the be d se t an the ver ic l par of

t he in er flan e ofthe rim immediately ab ve the

be d se t radius

4.5 C ont our ut line de ic ,such asa proje tin grid,

c mera,etc which permitsthedistinct o tl nin of

the externalco to r ofthe tyre

cros -se tio n rmalto the tyre eq ator, at the p int

ofthemaximum deformatio ofthet e d

The d evic shal red c to a minimum an distorio

an ensurea co stant (k nown) ratio betwe n the

ploted co to r an thea tual dimensio s

The d evic shal permit thereferenc of thetyre

co to r to thewhe l axis

5.1 Strength t est

5.1.1 Pr parat on ofty e

5.1.1.1Mo nt thetyre o a test rim and inflate i to

thepres ure spe ified inrelatio to themaximum

loa d ratin

5.1.1.2 Maintain theas embly at test room

temperature for at le st 3 h

5.1.2 Test proc d r

5.1.2.1Re djust thetyre pres ure to that spe ified

in 5.1.1.1 befor e or af terthe mo ntin ofthe

as embly o a fixture

5.1.2.2 Positio the plu ger as ne r to the c nt el ne

a s p s ible, av idin penet atio into the t e d

gr oo es, and force theplu ger perpen icularly into

the t e d at a rate of5 mm/min * 2,5 mdmin

5.1.2.3 R ecord the force and penet atio at the

moment ofbre kin (se also 5.1.2.7) at e ch offive

test p ints ap ro imately eq al y spa ed aro n

the circumferenc ofthe tyre.Inc se of tyres

mo nted o rim diameter co es 10 an smal er, test

the tyreat thre p ints

5.1.2.4 Ifthe tyre fai s to bre k befor e the plu ger is

sto ped o re chin the rim, then the tyre is de med

to have pas ed the test at that p int

5.1.2.5 Comp te thebre kin energ , W, in jo les

for e ch test p int, exc pt h se co sidered

b 5.1.2.4, b me ns ofthe folowin formula:

FXP

W=-

2 O0

where

F is the for ce, in newto s;

P isthe penet atio , in mi lmet es

5.1.2.6 Determine thebre kin energ value for the

tyre b comp tin theaverage of thevalues

o tained

5.1.2.7 When anap ro riate d evic which

automatic l y evaluates thevalue oftheenerg W is

avai able, thepenet atio c nbe sto ped sh r ly

af terhavin a hieved the prescribed value

5.1.2.8 Inthec se oftu eles tyres,me ns may be

pr ovided to ensurethe retentio ofthe inflatio

pres ure for the d ratio ofthetest

O BSI 06 2 0

2

Rer od e b IH u er lc se with BI - Un ntr ole Co

5.2.1Pr p rat on of tyre

5.2.1.1 Mo nt the tyreo a test rim and inflate to

thepres ure cor esp n in tothe maximum load

ratin

5.2.1 2Maintain the as embly at a temperature n t

les than3 "C for atle st 3 h

5.2.2 Test proc dur

5.2.2.1 Re djust thetyre pres ure tothevalue

spe ified in 5.2.1.1 immediately before testin

5.2.2.2 Mo nt the tyre an rim as embly o a test

axle an pres i against theo ter fa e ofa test

drum

6.2.2.3 Durin thetest he ambient temperature,at

a distanc ofn t les than 150 mm an n t more

than 1 m from the tyre, shal be at le st 3 O N o

pr ovisio shal be made for co ln thetyre d rin

thetest

5.2.2 4 Co d ct the test,with ut inter u tio s,a t

n t les than8 kmh, test with loads an test

perio s n t les thanth se sh wn in Table 1

Tabl e 1 - Tes paramet ers fo r enduranc

S e d symb l

M to P inclusive

Q, R, S

T, u,H,v

W

tyr e ma ximum lo d rating

10 0 %

108 %

Inflat ion

pr s ur

k a

2 0

3 0

3 0

32

Tyre ve sion

Stan ard loa d

Reinforc dí ext a load

r

5.3.1 2 Maintain the tyre and rim as embly at test

room temperature for n t les than 3 h

5.3.2 Test met hod

5.3.2.1 Before or aftermo ntin the tyrean rim

as embly o a test axle, re djust thetyre pres ure

to that spe ified in 5.3.1

5.3.2.2 Pres thetyre and rim as embly against the

o ter face of thetest drum

5.3.2.3 Ap ly a load eq al to 6 5 % ofthemaximum

load ratin ofthe tyreto the test axle

N T For p ed symb l V tyres, the m aximum lo d rating

is 85% ofthe rated lo d (l oad in de x ) For p ed symb l W tyres,

the ma imum lo d rating is 7 % ofthe rated lo d (l oad in e )

(se e IS 5 51-1)

An e B giv e s infor mat ion on related high sp ed tests

Inthe c se oftyres desig ed for he v weig t

to rin m ot or cycles i.e tyres with a rim diameter

cod e 15 and a bo e and a loa d c pa ity in ex 6 an

ab ve inreinforc dí ext a-load versio , the ap l ed

load shal be 7 % ofthe maximum tyre load ratin

5.3.2.4 Thro g o t the test thetyre pres ure shall

n t be cor e ted an thetest load shal be kept

co stant

5.3.2.5 Durin thetest,the temperature inthetest

room shal be maintained at betwe n 2 0 "C

an 3 O , or ata hig er temperature if thetyre

man f acturer agre s

5.3.2.6Car y the test thro g with ut inter u tio s

a s fol ows, in relatio to thetyre spe d symb l and

thetest drum diameter

a)The initialtest spe d is eq al to the tyre's

spe d ca t eg r y:

- les 40 km/h o a 1,7m drum;or

- les 3 k m/h o a 2 m drum

b) Ac eler at e the eq ipment at a co stant rate

such that the initialtest spe d i s re ched at the

end of2 min from star -u

S e d symbol

P

Inflat ion pr s ur

kPa

2 5

Q to S inclusive

T to H inclusive

5.4.1.2 Maintain thetyre an rim as embly attest

room temperature for n t les than3 h

5 4 2 Testproc d r

5.4.2.1 Re djust thetyre pres ure to the value

spe ified in 5.4.1.1

5.4.2.2 Mo nt the tyre an rim as embly o the tes t

axle and ensure that the as embly rotates fr eely

5.4.2.3 Positio theco to r o tl ne d evic and

asc r ain that i t is perpen icular to the rotatio of

the

test yre t e d

5 4 2.4 Ac elerate the as embly with ut

inter u tio to re ch the maximum spe d c pabi ty

ofthetyre within 5 m in

Thetyremay be rotated either b me nsofa drive

motor a tin o the tyre axis or b pres in it

against a test drum ( 4.1)

5.4.2.5 Che k that the tyre spe d i s within *2 % of

themaximum spe d c pabi ity ofthetyre

Maintain the eq ipment atco stant spe d for at

least 5 min and then che k the tyre co to r

5 4 2.6 Durin the test the temperature in the test

room shal be maintained at betwe n 2 "C

and 3 "C, or at a hig er temperature if the tyre

man f acturer agre s

2 0

2 0

6.1 Test sam ple

Thre tyres with identic l chara teristics e.g siz

desig atio and ser vic descriptio or maximum

load rating and spe d c pabi ity,shal comprise a

test sample:

a) o e tyre shal be used for the me surement of

st en th;

b) a se o d tyre for the en uranc test;

c) a third for the hig -spe d performanc test

an íor the c nt ifu al growth test

The pres ures, loads an spe ds shal be as spe ified

for e ch te st meth d

Ea h test sample shal co for m tothereq irements

spe ified in 6.2 to 6.5 asap ro riate

6.2 Strength test

6.2.1 Ea h test sample shal me t atle st the

req irementsfor minimum bre kin energ

spe ified in Table 4, when tested in a cordanc

with 5.1

Ta ble 4 - Minimum br eak ing energy

o er 210 km/h

I T yr ve sion I Minimum br aking ene g I

2 0

Lig t

J

17

6.2.2 For tyres with a desig se tio width les

than 6 mm, the req ired energ value is to be

red c d b 15 %

6.3 Enduranc test

6.3.1 When the tyre hasbe n su je ted to the

lab ratory en uranc test spe ified in5.2, usin a

test rim an a valve which u derg no permanent

deformatio an alow n los ofair,there shal be

n visual evidenc oft e d, ply,cor d, belt orbe d

separatio , ch n in , o en splc s,cra kin or

bro en cor ds

6 3 2

If the f inal pres ure me sured immediately

after the test is les thanthe initial pres ure, the

test shal be repe ted with an ther sample

6 4 Hig -spe d t est

6.4.1 After complet io ofthe lab ratory hig -spe d

test spe ified in 5.3usin a test rim an a valve

which u derg n permanent deformatio an alow

n los ofair,there shal be n visual evidenc of

t e d,ply, cor d, belt orbe d separatio , ch n in ,

o en spl c s, cra k in or bro en cor ds

6.4.2 I f the f inal pres ure me sured immediately

af ter the test is les thanthe initial pres ure, the

test shal be repe ted with an ther sample

Stan ard

Reinforc diextr a load

34

45

O BSI 0 -2 0