Input for End Mill

[TomG]

I buy most of mine from McMaster Carr. They carry Niagara brand which are made in the U.S., are reasonably priced and very good quality. If you are cutting mostly aluminum, then concentrate on 2-flute HSS double end end mills. For steel, four flutes are better because they are more rigid and with four flutes, place half the load on the teeth as two flutes. As Ed pointed out, sets are a waste of money. I use mostly 1/8", 1/4", 3/8" and 1/2". The smaller ones run about $17 and the 1/2" is about $10 more.

Tom