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I finally got a clean finish on 6061 aluminum by changing my feed rate to 0.003 inches per tooth
I was getting a lot of chatter and a rough surface on a part for a local bike shop, so I slowed the feed way down from my usual setting. The finish came out smooth as glass and the part fit perfectly on the first try. Has anyone else found a sweet spot for feeds on aluminum that works every time?
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colesanchez13h ago
My first attempt at aluminum looked like a beaver chewed it, so I'm taking notes.
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rivera.simon16h ago
Slowing the feed is key for a clean finish, but you can also play with the spindle speed. I found running a two-flute end mill at around 15,000 RPM with that light feed gives a mirror finish without the risk of melting the chips. It's all about that balance. Too slow and you work-harden it, too fast and you get a mess.
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