wood and aluminum
We run both wood and aluminum on our cnc machine. I ordered a new 5/16 Oflute bit for cutting holes in 1/4" aluminum extrusions. I push the bit to the limit and run it all day long with only air for cooling. The finish and speed is excellent.
2 other spiral, spiral down 1/4" spektra bits are being used on plywood, excellent finish, clean and quiet. Best bits i have worked with for the applications.