fraisa.com 344 Technical notes regarding use of thread milling cutters Specifying the feed speed Avoiding profile distortions Conversion from feed vf on the workpiece to the programming feed vfc which is the feed in the tool centre: Nominal thread diameter d For internal threads For external threads In order to avoid profi le distortions, the diameter of the thread milling cutter D1 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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