Page 191 - Threading_Handbook

Tangential Entering by arc (Recommended)
THREAD MILLING
The tool enters the material in an arc movement, and at the end of the thread the tool also
extends in an arc movement from the material. This method is recommended because the
cutter gradually enters the material and the load on the tool increases gradually.

Internal Threading

2

DW DC 1 3
6 4

5

External Threading

2

DW 3 1
4
DC

5

DW - Workpiece diameter
DC - Cutter Diameter
1-2: Rapid approach
2-3: Tangential entry by arc
3-4: Helical movement during one full orbit (360°)
4-5: Tangential exit by arc
5-6: Rapid return

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