INTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXAYHAPOAHAR OPI AHM3AuMR I IO CTAHAAPTklBALklM Hexagonal dienuts Fili&res hexegonal[.]
Trang 1INTERNATIONAL STANDARD
IN E NATIONAL ORG NIZATION FOR S AN AR IZATION
ME AY APO HAR OPI-AHM3AuMR I-IO C AHA P klBAL lM
Fi&re hexeg nale de fietage A main
Se on d e di ti o n
19 8-0 -15
Ref ere c n mb r
Trang 2IS0 (he Internatio al Organiz tio for Stan ardiz tio ) is a worldwide federatio of
natio al stan ards b die (IS0 member b die ) T e w ork of preparin Internatio al
Stan ards is n rmaly c ried o t thro g IS0 te h ic l com ite s Ea h member
b d intere ted in a su je t for which a te h ic l com ite ha be n e tablshed ha
the rig t to be repre ented o that com ite Internatio al organiz tio s, g vern-
mental an n n-g vernmental in laiso with ISO, also tak e part in the work IS0
colab rate clos ly with the Internatio al Ele trote h ic l Com is io (IE ) o al
maters of ele trote h ic l stan ardiz tio
Draf Internatio al Stan ards ad pted b the te h ic l commite s are circulated to
the member b die for ap ro al before their a c ptanc a Internatio al Stan ards b
the IS0 Co nci T ey are ap ro ed in a cordanc with IS0 proc d re req irin at
le st 75 % ap ro al b the member b die v tin
Internatio al Stan ard IS0 72 6 wa prepared b T ech ic l Commite ISO/T C 2 ,
Smal to ls
T his s co d editio c nc ls an repla e the first editio (IS0 72 6 : 19 51, of which it
co stitute a min r revisio
Us rs sh uld n te that al Internatio al Stan ards u derg revisio from time to time
an that an referenc made herein to an other Internatio al Stan ard imple its
late t editio , u le s otherw is stated
@ Internatio al Organiz tio for Stan ardiz tio , 19 8 0
Printed in Sw itz rlan
Trang 3Hexagonal dienuts
Circular s rew in die are spe ified for c rtain thre d forms in
IS0 2 6 , IS0 4 3 an IS0 4 31 F r c rtain siz s of the e
thre ds, it is co venient for some p rp s s to us hexag nal
dien ts inste d of circular die an , for p rp s s co ne ted
w ith their man fa ture an us , it is de irable that c rtain
dimensio s of the e dien ts sh uld be stan ardiz d
T his Internatio al Stan ard spe ifie the general dimensio s of
hexag nal dien ts for c rtain siz s of IS0 metric thre ds
(coars an fine pitch s rie - s e IS0 6 an IS0 2 1 , IS0
inch thre ds (U C an U F s rie - s e IS0 6 an IS0 2 31,
IS0 2 8-1 , a wel a the n n-prefered thre d s rie B W ,
B F an B
IS0 7-1, Pipe threds where pre sure- gt joints are made o
toleranc s
IS0 68, IS0 general p rp s s rew threds - Ba ic profie
IS0 2 8-l Pipe thre ds where presure- g t joints are n t
made o the thre ds - Part 1: De igato , dimensio s an
toleranc s
IS0 2 1, IS0 general prps metric s rew threds - General
plan
IS0 23, IS0 inch s rew thre ds - General plan an s leto
for s rews, b ls an n ts - Diameter rane O,Q6to 6in
IS0 268, Han - an ma hine-o erated circular s rewin die
an han -o erated die stocks
IS0 4 3 , Han - an ma hine-o erated circular srewin die
for taper pipe thre ds - R srie
IS0 423 , Han - an ma hine-oerated circular srewin die
for paralel pipe threds - G s rie
Se the fig re, an table 1 an 2
Dien ts havin dimensio s in a cordanc with th s given in
table 1 shal be mark ed with the relevant thre d de ig atio
spe ified in IS0 2 6
Dien ts havin dimensio s in a cordanc with th s given in
table 2 shal be mark ed with the leter R immediately folowed
b the de ig atio of the thre d
Example :
A hexag nal dien t for R s rie pipe thre ds with de ig atio
l/8 shal be mark ed a folows :
R l/8
W here to ls comply in al re pe ts with the relevant Inter-
natio al Stan ards, the symb l IS0 may be ap en ed to the
mark at the dis retio of the man fa turer
Trang 4L J E
Fig re - Dimensio s
Table 1 - General table of dimensio al chara teristic of hexag nal dien ts for metric an inch thre ds
(ec pt R srie pip thred )
Ra g of thre d diameter, d
I
Metic pitc e
5 5 5
Numb r of thred p r in h
4
4
i
Cutin width, E (m )
js13
m
in
Ovr
a d
tlT3
m
5" 7
18
7
9
18
2
l T he e c tin width , whic ar e th lower of th two vlu s s eifie for ec ra g of thred diameter, ma b in res d to th hig er v lu givn
in th ta le at th dis retio of th ma ufaturer
Trang 5Table 2 - T able of dimensio al chara teristic of hexag nal dien ts
for R s rie pipe thre ds
Deig atio
l/ l
l/6
l/ 4
318
l/ 2
314
1
1 1 4
1 1 2
2
Baic
Ap ro imate
7 ,7 3
0,97
5,614
2,39
21
10
2
10
4 1
15
5
19
8 5
2
Trang 6U DC 6 1.9 2.31
Decriptors : to ls, h n to ls, c tin to ls, thre din die, dime sio s
Pric b sd o 3 p g s