Tiêu chuẩn iso 01604 1989 scan

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19 !3-1 -15

IS0 16 4 : 19 9 (E)

F oreword

m ters of elec trotec hnic a l sta nda rdiza tio

c onstitutes a tec hnica l revisio

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Inter natio nal Organizatio f o r S tandar dizatio

Ca se p ostale 56 C H-1271 Ge &v e 20 l Switz rland

P r inte in S witz rland

Belt driv es - Endless wide V-belts for industria l spe

pule s

refere c in this tex t, c n titute prov isio s of this Interna tio a l

Termin lo y

-

-

1

5 Dimen io s an toler a nc es

th ir p rofie a re le ft to th b elt ma nufa cturer’s op tio ,

NO T E - Th ap p r ox im e form ulae are a s folows :

- he ig t ab ov p itc h ln , 8 = 0.08 w P = 0 ,25 T

- he ig t b elow p itc h ln , H = 0 ,2 4 rv P = 0,7 5 T

a bov e HI)

*I Th r i e-in va lu s relate to the c hec kin p ule o ute r diameters given in table 7 Th ap p rox im e valu

o f r i e-o ut ab ove br nin o f s rvic p uley s (s e tab le 5) is given by 0,12 6

Ta ble 3 - B elt le gth

Da tum le gth

I

B elt d sig atio

L d

tol

WI6

f 10

X

f 12

6 0

X

X

X

X

X

X

X

X

X

X

NO TES

1 The a llowa ble dev ia tion on the da tum len th is a bout + %

2 B ox-ty pe sped c h ger s ned a c lose r toler anc e, whic h c a n b compled with by p r intin a c onv entiona l

lenth sy mbl on the ex ter na l fac e of the b elt afte r c hec kin

f o r b ox -typ e sp ee -c hang rs)

3

5.1.5 Ce tre dista nce va ria tio s

I

B elt le gth

I

B elt sec tio

I

I

I

over

(inc lu ive)

A E

- gr ooe h ig t ab ove th p itc h ln , b = 0 ,0 8 1~ ;

gr ooe h ig t b elow th p itc h ln , h = 0 ,3 5 wd

B ec a us o f the n e d f o r c mpa ctn s o f th s ty p es o f sp ee -c hang r s, it is n c esary to minimiz datum

d

0,min =

d

4

6 Me s rin an c eckin

1) The ten ion on ec stra nd of the blt s al b eq al to one-ha lf of the v alues giv en

- datum c ircmferenc e, C ,, = 12,5 wd

12.5

-

u =O,lw,

- h, is giv en by

2 h, = d, - d - 2 x ride-out

w here ride-out is the maximum v alue giv en in ta ble 2

5

6.1.3 Ch cking b elt le gth

in 6.1.2;

in th ga uge-puley

NO T E - If n ces a ry, th se e gra v ed ln s may b fi e with pa int, so

tha t th y ca n b se n more ea siy

by 18V’

width

to th b a lls or ro s a nd p a r a llel to th a x is of th p uley

The da tum dia meter, d, , is giv en by

Ta b le

WI6

d

Pitc h ln -

6

i

I

7

E

I

0

C ut ba ll o r r od

to c lear btom

of gr oov e

Annex A

(infor m ative)

10