Drill Bit Selection Guide
Drill Bit Selection Guide decisions begin with the workpiece, hole diameter, depth, tolerance, surface finish, and machine. Matching point geometry and material to the job improves accuracy, chip control, productivity, and tool life.
Table of Contents
High speed steel provides toughness and value for general drilling, while cobalt alloys improve hot hardness. Solid carbide supports higher speed, rigidity, and wear resistance in stable machines. Coatings such as TiN and TiAlN reduce friction and heat. Twist, step, spotting, flat, and deep-hole designs each serve different requirements.
Check point angle, flute length, shank, coolant delivery, runout, feed, and spindle speed. Use rigid workholding and clear chips before they recut or jam. A reliable cutting tool manufacturer can recommend geometry and grade; review basic drill bit designs before selecting a tool.
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