When you need a cutter that has a surface harder than the material you want to cut, and durable enough to survive the loading and impact, choose a bit with a high-quality solid, micrograin carbide.

These 2 and 3 flute CNC Solid Carbide Spiral CNC Router Bits / End Mills for Steel, Stainless Steel & Non Ferrous Metalbits are manufactured from Amana Tool®'s exclusive ultra-fine micrograin carbide and feature a 30 degree Center Cutting Mill End, a corner chamfer (for extra strength), Up-Cut design and very importantly, a AlTiN Coating. Excellent for CNC use!

The AlTiN coating, along with a few physical attributes (upcut, mill end, corner chamfer) combine to give you have a router bit that can rout and mill steel, stainless steel, aluminium, brass, copper, even titanium. The router bits here are specifically designed for CNC machines, which is a good thing, as you can then accurately control feed rates to match the material being cut.

Originally posted by Stu on March 10th, 2014
Read the original blog here