I'm doing facing cuts and the tool is grabbing because the rake is too
positive (I think. There's a graunchy noise and the feed goes slack for a
bit. Worse near the center, I'm not sure why. Chinese minilathe, 0.5 mm cut,
brazed carbide tool on cast iron).

It's not really practical to change or regrind the tool. I'm dead on center
height, and wondered whether changing the height might make it better by
changing the effective rake somehow?

If so, which way? And why? I tried to work it out but got confused, and came
up with two different answers.

Thanks,


--
Peter Fairbrother