Ran a 3/8 carbide end mill at 400 sfm on 304 stainless, and it actually worked fine.

Everyone in the shop said it would burn up, but I got a clean finish and the tool is still good after 50 parts. Has anyone else pushed the book speeds on stainless and been surprised?

2 comments

2 Comments

kellyj2311h ago

Everyone said it would burn up" sounds like shop superstition.

tara34510h ago

My buddy ignored the old "it'll burn up" line about a used motor, @kellyj23. He got it cheap and just changed the oil right away. That thing ran for years in his truck without a single problem. Makes you wonder how many good deals people pass on because of that same fear. Sometimes shop talk is just passed-down worry, not real advice.