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Rigid tap m2.5 holes

Machinist_max

Aluminum
Joined
Dec 15, 2016
Has anyone rigid tapped m2.5 holes in 3/16 stainless .375 deep?
have 100 to do....
what would you suggest for speed?

or am I better off hand tapping?

2002 Haas mini mill
 
Yes I have.

I would suggest a speed of, as fast as you can. :D Drill the Minor out with HSS around 75 SFM and Roll Tap as fast as you want.

No, you are not better off hand tapping.
 
Roll tap. We roll tap M1.6 all day long in 316 st/st with no issues. We use tapping oil rather than the machine coolant, but if you are using the coolant I would suggest a high concentration.


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