Drilling with live tool on lathe using holder that has ER25 collet. Keep locking the machine up during drilling. Determined the problem is the drill slipping in the collet and overloading the thrust axis. I know it would be better with a 40 collet but don't have it. Anyone have any tips on improving the torque capabilities on these minimal size collets? Tried using a diamond file to put a little "tooth" on the shank but still slipped. The drill shank is glass smooth so the collet just can't grip it.
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