Page 368 - Carbide drills I Thread cutting tools 2023

Technical notes regarding use of thread milling cutters

Specifying the feed speed

Conversion from feed v f on the workpiece
to the programming feed v fc which is the
feed in the tool centre:

For internal threads

For external threads

Nominal thread diameter d

Avoiding profile distortions
In order to avoid profile distortions, the diameter of the thread milling cutter D 1
must not exceed 2/3 of the nut core diameter d.

The overmeasure of the core drill-hole should be 0.1 to 0.3 mm.
The thread is thereby milled perfectly.

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