Dimensione pre-foro di maschiatura

For Holemaking Application

 

Cutting Tap Parameters

in mm
% What's This?
Enter desired % or leave blank if you do not know. Cutting Taps 68% to 70% recommended
 

Resulting hole size

in.
 

Forming Tap Parameters

in mm
% What's This?
Enter desired % or leave blank if you do not know. Cutting Taps 68% to 70% recommended
 

Resulting hole size

in.
 

Calculate major diameter for Tap Drill Size

in mm
 

Result

in
 

Suggested Percentages of Full Thread in Tapped Holes

A common internal thread, drilled so that it results in 50% of full thread will break the external thread, before the internal thread will strip. A common internal thread drilled out so that it contains 100% of full thread is only 5% stronger than a 75% height of thread, yet it requires 3 times the power to tap.

These calculations are based upon theoretical values and are only intended for planning purposes. Actual results will vary. No responsibility from Kennametal is assumed.