Been doing this for a living most of the last 33 years, cut a trainload of
M4 and T15 tool steel, a lot of it soft then hardened 65 Rc and more, recut with cbn inserts. But up until now I’d somehow managed to avoid super-alloys. Till now. Getting my feet wet with a bunch of Monel. A bunch of 90/10 copper nickel too, though it’s no where as bad. Luckily our tool rep hooked us up with the right grade of cutting tools, and I have bent a lot of folks ears over speeds and feeds.
It’s really been going great, I’m surprised. Makes stringy nasty chips, and slow to run. But I’ve been told thats the nature of the beast, that I should be glad that at least the parts are looking good.


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