THREADING SYSTEMS - JEL - 05/2008 - Komet
THREADING SYSTEMS - JEL - 05/2008 - Komet
THREADING SYSTEMS - JEL - 05/2008 - Komet
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Torque calculations<br />
for tapping and thread forming<br />
M: torque in Nm<br />
Kc: specific cutting force (N/mm 2 ) as shown in table (see below)<br />
h: thread pitch in mm<br />
D: nominal thread diameter<br />
M =<br />
Fct*<br />
8000<br />
x Kc x h 2 xD<br />
*Factors<br />
Tapping<br />
Thread forming<br />
New tool<br />
Used tool<br />
1,0 2,5<br />
2,5 3,5<br />
Table for specific cutting force Kc<br />
Material<br />
Kc value<br />
(N/mm²)<br />
Steel 1000-1300 N/mm²<br />
Steel 800-1000 N/mm²<br />
Steel 600- 850 N/mm²<br />
Steel
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