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15 Appendix C: Breakage of thread tools
This breakage datas are for chipping production of thread tools.
The core diameter of a through whole thread tool is higher than a ground whole thread tool.
Thereby the fraction of through whole thread tools are approx. 10% higher.
Breakage list for ground whole thread tools
Thred size
Breakage in Nm
M0,5
0,02 -
0,07 Nm
M0,8
0,07 -
0,10 Nm
M1
0,10 -
0,15 Nm
M2
0,2
-
0,5 Nm
M3
0,7
-
1,5 Nm
M4
1,3
-
2,2 Nm
M5
3,5
-
8,0 Nm
M6
7,5
-
14 Nm
M8
18
-
35 Nm
M10
50
-
75 Nm
These data are empirical values of tools with different qualities.
At high engine speeds it is recommended to select a low breakage as set value for the
breakage.
If you need detailed breakage- and cut data of the thread tools, please ask the producer of
the thread tools.
Based on the diversity of the different tools it is not possible to state the values in a list.
Thread tools for non-cutting production (thread former) have are much more stable state
because of their construction and missing chip nuts.