Drilling Speeds and Feeds - University of Florida
many factors, including the following: 1. composition, hardness, and thermal conductivity (k) of material 2. depth of hole 3. efficiency of cutting fluid 4. stiffness and condition of drilling machine 5. stiffness of workpiece, fixture, and tooling (shorter is better) 6. quality of holes desired 7. life of tool before regrind or replacement