we are turning a .125 diameter by .400 long teflon part on a citizen B12(.250 diameter barstock). the problems we are encountering is that the oal is not repeating. we are running dry with a constant air blast @ cutting tool. basically we are doing this. we have to hold +/-.001 on OAL but we are absorbing the entire tolerance and them some.

collet is set just tight enough to grip mat'l without slippage and GB is set with very minimal drag.

ANY HELP WOULD BE HUGE!! We always struggle with Teflon

Thanks


1-face
2-spot
3-drill thru(.050 dia)
4-re-face & turn(one cut to Z.450)
5-cutoff