Hi all,

I have been doing light CNC and lots of manual machining work; mostly with HSS and some cobalt cutters. This is the first time I am machining hardened gears to reduce mass. I would like to do the gears on the CNC and purchased some solid carbide cutters. My plan is to mill a groove as wide as the tool about 0.3125" deep total, flip the gear and do the groove again, then do a circular bolt pattern through the web I created.

Question is what rpm and feed rate should I be going at for the milling and the plunging process? Or should I use my cobalt end mills instead? I have rough and finishing end mills.

Thanks!