Hello,
I am new to this website (tonight). I hope I am not posting this thread in the wrong section...
Does anyone have experience in hard turning carbide? Not green carbide (before pressing), the really hard stuff... 75+ Rc... I have experience and success with nickel grades ie: CD-12N, but am having a bear of a time with micro grain carbides that do not contain Nickel.
We are trying to hold within .0002 in. over 2+ inches of profile work. Finish must be excellent (10 rms or better). At least there are no interrupted cuts (thank goodness). Currently using PCD tipped tools (DNMA-433) and trying various toolholder geometries. Roughing eats up PCD inserts (as expected) but must be done as preforms are not very close (having to remove .015 or so per side before even thinking about finishing).
Any suggestions and/or comments would be greatly appreciated.

Thanks for taking the time to read this,
Bonz