- Joined
- Feb 20, 2019
- Messages
- 353
I've yet to grind a HSS tool that I got as good a finish as I do with CCGT inserts. They say for aluminum but they work great on 12L14, 416 SS as well as aluminum. I've used them on Delrin and great finish but it gets stringy. I doubt any are going to break chips in plastics.