HAHN CAT 0207 (VG):HAHN CAT 0207
HAHN CAT 0207 (VG):HAHN CAT 0207
HAHN CAT 0207 (VG):HAHN CAT 0207
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Tolerances on the Thread of Taps for Metric ISO-Thread <strong>HAHN</strong>REITER HSS-E<br />
Internal Thread<br />
H height of sharp thread profile<br />
D basic outside-Ø<br />
D1 basic minor-Ø<br />
D2 basic effective-Ø<br />
P pitch<br />
TD1 tolerance of minor-Ø<br />
TD2 tolerance of effective-Ø<br />
El fundamental deviation<br />
α included angle of thread (60°)<br />
Taps<br />
d basic outside-Ø (d=D)<br />
64 UK +44 (0)1376 347566 Email: enquiries@fenntool.co.uk Website: www.fenntool.com Ireland +353 (0)45 877740<br />
d 2<br />
E m<br />
T d2<br />
effective-Ø of tap<br />
lower deviation for d 2<br />
tolerance of effective-Ø<br />
t = T D2 (Qual5) tol. class 5 of internal thread<br />
Js lower deviation of outside-Ø<br />
P pitch<br />
Effective-Ø of Metric thread is calculated as D 2 = d 2 = D - 0,64952 · P<br />
Tolerances and fundamental deviations of major- and effective-Ø are<br />
calculated based on tolerance unit „t”<br />
α thread flank angle (60°)<br />
α/2<br />
t = T D2(Qual5) (vgl. Tab. 5 ISO 965-1)<br />
1/2 included angle of thread (30°)<br />
R nom. Radius<br />
T D2(Qual5) = 90 · P 0,4 · d 0,1 · 1,06<br />
d = geometric mean of diameters)<br />
Tolerance class Effective-Ø Min. and Max.<br />
Major-Ø (DIN 802/1 (withdrawn))<br />
ISO 1 / 4H<br />
ISO 2 / 6H<br />
ISO 3 / 6G<br />
7G (DIN 802/4)<br />
d 2min = d 2 + 0,1 · t<br />
d 2max = d 2 + 0,3 · t<br />
d 2min = d 2 + 0,3 · t<br />
d 2max = d 2 + 0,5 · t<br />
d 2min = d 2 + 0,5 · t<br />
d 2max = d 2 + 0,7 · t<br />
d 2min = d 2 + 0,7 · t<br />
d 2max = d 2 + 0,9 · t<br />
d min. = D +0,3 · t<br />
d min. = D +0,5 · t<br />
d min. = D +0,7 · t<br />
d min. = D +0,9 · t
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