Re: Tapping Aluminum Cross hole seizing up
Does retapping help or hurt?
I mean, for example, command
G84 Z1. F.1
Z1.
the 2nd Z1. will repeat the tapping cycle to the same depth. Give that a try and tell me, Does that bell mouth the threads at all? or remove the sticky spot in the middle?
Or peck tapping...?
G84 Z.4 F.1
Z.7
Z1.
Also, I just thought of this: Is your part banana'd? Find the best fit pin for the thread minor (only insert it .125" to find the best fit size). Then, does the pin drop through the part freely? or does it hang up? you can also roll the part on a surface plate. Does it wobble? or put it in a concentricity checker. Roll the bart and put an indicator on the OD. Does the reading seem high?
CNC Product Manager / Training Consultant