Bsi bs au 050 4 4 1a 1995 (iso 4251 3 1994) scan

Rim profi es and dimensions... At th time of publc a tio ,th e itio s in icate were valid.

I: II 2 6 9 D50 I lL 222 W

Part 4 Rim profi es and dimensions

The pre paratio ofthi Britis h Sta d rd w as e n tru ste d to Tec hnic al C o mmite

AW4,

mes

a d w heel s for ro ad vehic les , u p o n whic h the folowin bo di es w ere

represented

Agric ultural Engineers ’ As s oc iation

Auto mo bile As s oc iatio n

Britis h Industri al Ihick As s oc iation

Britis h P re ssu re Ga ge Ma u dwer s’ As s o c iatio n

Britis h Rubb er M anufactu rei s’ As s oc iation

C onfderation ofPas e ng er Transp o rt UK

D epartment ofn-d sp o rt

Freig ht lkansp o rt As s oc iation

Insti tu te ofRo d ‘Ii- ans port Eng i nee rs ( Inc )

Motor Cycle In ustry’s As s oc iation ofGreat Britian Ltd

Motor Industry Res earc h As s o c iation

National w eD is tributo rs ’ As s oc iation

Retrea Man fa turer ’As s oc iation

Ame n dme n ts is ued sinc Dublicatio n

Th fol l owi n g BSI references

rela t e to t he work on this

sta dard

Comm it tee refer en ce AUE7

Dra ft for om ment 9 U7 28 6 DC

ISBN O 680 2 7 66 2

4

D imens ions ofother dro p -c entre rims

7

figures (informative) Rims with n min l di ameter codes 1 3 and 16.1

Co nto u r ofother drop -c entre rims

Opi nl lo c aíi o n of15 7 mm v lve hole

Lo c atio n ofv lve hole i n com er ofwel

B S AU 50 : Part 4 : Subs c i n4.la : 199

This Su bsec ti o n ofthi Part ofB S AU 50 h s bee n prepare d b Tec hnic al C o mmite

AW4 and is i denti cal to IS042513 : 19 4,ïjg-e~ ( ply -rating mar ed serie s) a drim s

fora ricul uml tractors a d m ach in e s - Part 3 Rims,pub lis hed b the Intern ti o nal

O rg anizatio n for Standardi z ati o n (ISO) I su per edes BS AU 50 : Part 4:

Su bsec ti o n 4.1 : 19 1 whic h i with mwn The c o rre sp o ndi ng ty re de tai l s are deal t with

i n Part 1 ( Su b sec ti o n 4.la ) O ther P arts ofthe Standard are:

Part1 q.p.9;

Part2 Wh.e&a drim;

Part3 vlves

Part 4 ofBS AU 50 ( ri m p ro fi l es an d di me nsi o ns) w as i ntro duced to asist

c ro s s -reerenc in b e tw een tyr sp e c i fi cati o ns an d the c o rre sp o ndi ng rmsp e c i fi cati o ns

Subsecti o ns ofPart 4 su c cessi v el y su pe rse ded t he info rmatio n c o ntai ned in B S AU 50 :

Part 2 : Se c ti o n lb : 19 0, whic h is c o nsequ entl y with drawn i n 1 995

The Tec hnic al C o mmite has eview ed the p ro v i si o ns ofIS 4 0 - 2 : 19871) to which

normative re fere n ce is ma e in the text, an d has deci ded th t they a re ac eptabl e fo r

u se i n cod unctio w ith thi stand rd

Co m pliance with a Brit ish Stand ard does not ofit elf conf r i mmu n i ty fr o m

leg l obl g t ions

T y r es (ply rating marked ser ies) and rims f or

R ims

1 S c ope

This pa r t of IS04 51 sets out rim dime sio s for

tyres of th ply ratin ma r ke series for a gr ic ult ur a l

tr actors and ma c hin s

Ty re d sig a tio and dime sio s, load r a tin s and

tyre c la ssif ic at io a d n me clature are giv en in

2 Normative re fe re nce s

Th folowin st anda rds c onta in pr ov isio s which,

throug refere ce in this text, co stitute pr ov isio s

of his pa r t of IS0 4 51 At th time of publc a tio ,th

e itio s in icate were valid A ll standards are s bject

to rev isio , a d pa r t ies to a re me ts,b se o this

p a rt of IS0 4 51 are e c our a ge to in estig te th

p s ibi ty of a pply in th most r ec ent e itio s of th

st anda rds in icate b low Memb rs of IE a d IS0

ma int ain r egisters of c r e tly v a lid Inter natio al

St anda rds

IS0 4 0 -2:19 7, Pas e g r c r tyres a d rims

-Part2:Rims

IS0 4 20 -2:19 3, Tru k a db s tyres a d rims (met-

ric series) -Part2:Rims

3 Rim diameters and circumf e re nce s

Nomina l rim diameter c od s D, are as sh wn in

ta ble 1 relate to th sp cifie rim diameter giv en in

figur e 1

Fo r rim diameter me s reme ts,se ann x A

A toler a nc e of & 1, 2 mmo th rimcirc mfere ce is

p rmite

4 Rim contour s and v alv e hole s

4.1 Dr op-c ntr e W and DW rims

Dime sio s and toler a nc es of dro ce tre W a d D W

rims shall b as giv en in ta le a nd sh wn in

f igure 2

Th valve h le shall have a diameter of

15,7 mm '04 mmand may b o eith r sid of th

rim

Th n min l valve sea t angle is 30" f 5" To pro id

for v a lv e-o-v ehic le c learanc e, o t io a l valve s e at a -

gles of 4 " maximum are p rmis ible Fo r a y angle

selecte for a giv en rim, th tolera nc e is & 5"

4 2 Dr op-c ntr e DH rims

Dime sio s and t oler a nc es of dro -ce tre DH rims

shall b as giv en in ta le a d sh wn in figure

Th loc a t io of valve h les is sh wn in figure

1

9

81

Figure 1 - Spe ifie rim diameter

T yre-mo ntin sid l)

21 Fla g width in lu es e g ra ius Th p rtio of fla g b y n th minimum

width sh l be lower th n th hig est p int ofth fla g

3) These dime sio s c mprise th minimum wel e v lo e for tyre-mo ntin

p r poses

41 For a y a gle sele te for a giv n r im th tolera c is 15'

Figure 2 - Contour of W and D W rims

1) Th s p e cifie d rim diameters, D , in mi me tre s ,are

d eriv d fro m the nomin l rim d iameter codes, D, as

2) Fla g width in lu es e g ra ius.Th p rtio of fla g b y n th minimum

width sh l be lower th n th hig est p int of th fla g

3) These dime sio s c mprise th minimum wel e v lo e for tyre-mo ntin

Dime sio s a nd tolera nc es of oth r drop-c ent r e rims

sha ll b as giv n in t able 4 a nd sh wn in figur e 5

Th n r mal loc a t io of v alv e h les in th se rims is

sh wn in figure Th v a lve h le may b o eith r

sid of th r im wel

Th valve h le diameter shall b

a) 15,7 mm mmfor rims of n mina l rim dia m-

eter co e 15 a d above;

b) 1 ,3 mm +t4mm for r ims of n min l rim diam-

eter c od 14 a nd b low

A n o t io a l loc at io of v a lv e h les in rims of dia meter

c od 15 a nd a bov e (v a lv e h le dia meter

15,7 mm + !*4 mm) is sh wn in figure

A valve h le in th c or ner of th wel as sh wn in

figure7 is a n o tio al loc a tio a nd prov id s v a lv e-o-

v ehic le c lea r a nc e Valve sea t a ngles of 15" minimum

to 5 " maximum are p rmis ible F or any a gle

selecte for a giv en rim, th toler a nc e is I 5"

4 4 Semi-drop-c ntre rims

Dime sio s a nd tolera nc es of semi-dr op-c entr e rims

shall b as giv en in ta ble 5 a d sh wn in figure 8

m 1624669 0500120 235 =

IS0 42 1-3:199 (E)

1 Maintain 8 max dime sio b c u terb rin

o th we th r sid of th rim o ly

Fig re 4 - L c tion of v alv hole inD H rims

T yre-mo ntin sid ’)

- Bre k corn r e uiv le t toR 0.5 min

2) Fla g width in lu es e g ra ius Th p rtio of fla g b y n th minimum

width sh l b lower th nth hig est p int

Table 4 - Dime sions of other dro -c ntre rims

1) F or rimsiz s 3.0 B, 4 J, 4 1/2 J, a d 5 1/2 J, se IC04 0 -2 a d/or IS0 4 0 -2

2) L r aer v lu s rn v b re uire to e sure suficie t se c for tu eles tvre v lv c atin

rim, th tolera c is t’

Figure 7 - L c tion ofv lv hole in cor ner ofwel

R 1 m in 13 min.”

A

1) Fla g width in lu e e g ra iu The ortio offla g b y on th mi nimu m

w idth s al b L wer th n th hig e t p int of th fla g

NOT E -Flan e an b ead s at remov a ble o o e s id of rim

Fig re 8 - Contour ofs mi-dro -c ntre rims

1) Fla g width in lu es e g ra ius Th p rtio otfla g b y n th minimum

width sh l be lower th n th hig est p int ofth fla g

Figur e 10 - Contour of divid d rims

T r a nsv erse knu in o b ead seat s as sh wn in

figure 1 is ma nda t ory o n W, DW a nd DH r ims of rim

co es 2 or large Th folowin sp cificatio s a pply :

a ) knurln sha ll start 9,5 mm f 0,8 mm from th

fla g a nd shall b 1,6 mm min from th b ea d

sea t r a diu (se figure 1 I;

width c od s 14 or wid r with n mina l diameter C)

dì

e)

knurln width shall b 10 mm min for rims with

b ead seat width P ,, < 3 mmand 2 ,5 mm min

(nor mat ive)

Rim dia met er me s r eme ts (se c lause 3) shall b

p r forme u in a ba ll ta pe c hec ke o a ma ndrel

(se figureA.l) Th ball dia met er sh uld u ually b

16 mm

It wi b lef to th disc r etio of th in iv idua l na t io a l

sta nda r ds orga nizat io wh th r th ma ndr el sha ll

have n min l circ mfere ce or maximum circ

mfer-e c e

Bal sizes oth r tha n 16 mmma y b u e if a s ita ble

a lter a t io to th ma ndrel dia meter a d circ mfere ce

B.1 T his ann x h s b e drafe to r ec og ize th

existe ce of th 15.3 a d 16.1 rim sizes o ly T hese

r im sizes are n t in h rmo y with existin world

st a nda r dize sizes For rea so s of safety, th u e of

th se rim sizes sh uld b r estricte to th memb r

countries w her e th y are prese tly in u e No n w

d sig s sh uld employ th se rim sizes

B.2 Th tech icald ta o f th for merly st an a r dize

rims with n mina l diameter c od s 15.3 a nd 16.1 are

giv n in 8.2.1 and 6.2.2

B.2.1 Ri m 1 1 x W 1 C

Nomin l rim diameter c od , DR: 16.1

Sp cifie rim diameter,D: 4 7,5 mm

Dime sio s and t oler a nc es are giv n in t a ble 6.1 and

Nomin l rim diameter c od , DR : 15.3

Sp cifie rim diameter, D:3 8,3 mm

Dime sio s a d tolera ces are giv n in ta le B 2 a d

Table B - Dime sion of rim size W 1 C

Table B.2 - Dime sion of rim size 9.0

i)L rg r va lue s ma b re uire toe sure suficie t sp c for tu eles tyre v lv se tin

1

IS042 5 1- 3 :19 9 4( E )

(inf or ma tiv e)

C ] IS03 11 :1 7 ,Wh els/ims -Nome c/ature, desig atio , markin , a d u its ofmeasureme t

[] IS07 6 -1:1 9 ,Tyres a drims (metric series) for a ric lturaltra tors a dma hin s - Part 1: Tyre des-

[3] IS0 8 6 :1 9 A gric ltural tra tordriv -wh eltyres - Servic descriptio (lo dinde - sp ed symb l

ig atio , dime sions a dmarkin

ma rk d tyres

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