I have a Rock Chuck with the 3 collets Al talked about, I only run solid carbide bits but the collets will hold both carbide and high speed. Being the 40+year machinist that I am, I used many different collets and it doesn't matter if it's carbide or high speed, it's the diameter of the shank that matters. Hope this helps.
CarverJerry
ver. 1.188 Win 7- 64b with 6 GB ram @ 2.8Ghz and dual 1Tb hard drives. Rock Chuck & Ringneck vacuum system hooked up to a Harbor Freight large vacuum. Center line text, conforming vectors.