I have an endless supply of nitinol bars I need to face to clean. 3/8" diameter to 1" or so. Only taking off .01" at most usually. Have tried various manufacturers and grades but nothing has really stood out. Used mostly cnmg432 and a couple snmg432. Has anyone worked with this enough to suggest a good carbide grade or particular insert? These are being done manually for now, with the hope of moving facing and pilot drilling the end of the bar to a small cnc lathe.