Recently, we were asked how to mill 8620 on a Tormach.

Since 8620 is mid 50’s HRC, we knew it was going to be a little work to find the sweet spot. The other question was, “Do you need a specialty tool?” While specialty tools have their place and certain advantages, we wanted to see if it could be done with a regular carbide endmill. Let’s talk about what we learned in terms of speeds & feeds, tool stickout, and chip evacuation. Also, if you’ve ever wondered about different feedrates and the many Ramp settings in Fusion 360, we’ll cover that as well.

Hard Milling!

Hardmilling Tool Test on Haas VM3!

CNC Machining Hard Steel with Soft Jaws!