- Joined
- Nov 21, 2012
- Messages
- 793
I had to cut down a carbide tool holder for the lathe and decided to go with milling as opposed to grinding. I put in a 20 mm carbide roughing end mill and, added cutting oil and went in fairly fast and aggressive as is the way with carbide. The thing is it just started throwing sparks and burned up the end mill. The metal work hardened instantly. I have never machined anything like it. These were quality German made end mills and they just wouldn't cut the material.
I assumed the metal would be reasonably hard, about 35 - 40 hrc and had the rpm at about 900. Didn't even scratch the material I ended up having to grind it after scrapping 2 carbide end mills. Overall a sad day.
Paul.
I assumed the metal would be reasonably hard, about 35 - 40 hrc and had the rpm at about 900. Didn't even scratch the material I ended up having to grind it after scrapping 2 carbide end mills. Overall a sad day.
Paul.