Hello all, fairly new to CNC lathe work after years of manual machine work. I have often searched the forum for answers with good success.
But I do have a problem with tapping M4 thread into stainless. I have just purchased a floating tapping head for the job which is 200 threads. Just broken my 4th carbide tap. My machine is an Okuma LB15.Need help don’t want to tap by hand.
I have also checked the alignment(within a couple of thou) and used recommended speed.
This is part of my program for the job:
T0808 G97 S350 M42 M03 M08
G00 X0.0
Z5
G01 Z-6 F0.7
M04 M63 Z5

Can anyone tell me what I am doing wrong?
The tapping head certainly seemed loaded up (pushed in) when the tap broke.
Regards
Will