Just torched a $120 end mill because I trusted the 'recommended' speeds on a cheap aluminum bar stock.

3 comments

3 Comments

Those recommended speeds are more like a suggestion box, and the suggestion is usually "buy more end mills." Learned that one the expensive way too.

dakota8632mo ago

Ever wonder who actually runs their machine at those numbers, @rubyw70? Feels like the manual is written for perfect conditions that never happen in real life. You just end up learning the hard way.

jade6391mo ago

Always start way slower than they say... you can always speed up later.