I finally had a 6mm end mill snap yesterday after 4 months of pushing it way too far

Was running some aluminum plates for a client in Portland and pushed the feed rate up to 150% to meet a deadline, and the tool just gave out mid-cut. Has anyone else ever gotten away with running tools way past their suggested specs for way longer than you should?

1 comments

1 Comment

kevin_williams2h ago

Got a buddy who ran a 1/4" end mill for like two years on aluminum (carbide, but still) until it finally snapped and shot the chunk across his shop. He just kept feeding it harder and harder, always saying "one more part" until karma caught up.