Quote Originally Posted by Richard View Post
So anyone any ideas why that carbide endmill is showing so much wear?

Feeds and speeds were not a million miles away from G-Wizard.

I am surprised how ali can erode carbide so easily!
Is that end mill coated? Looks like it might have tialn coating, which will cause build up pretty quickly, that's probably not erosion but almost certainly a build up of aluminium on the cutting edge. You want uncoated cutters really for ali. And yes find out what the material is, even different batches of the same grade can cut differently but stuff like 1 series ali is horrible for machining.