Drill bits are the special rotating tools that have cutting capacity at the top. Generally, drill bits are made from carbon steel (SK), HHS (SKH2, SKH3), etc, and then by milling machining or quenching after rolling, the final step is the grinding after tempering heat treatment. Drill bits are used for machining metals or other materials. Drill bits have a wide useful, such as drilling machine, lathe machine, milling machine and power drill, etc.
Classification by Construction
- Solid Drill Bits: It consists of tip, body, and shank; all of parts are made from the same material as a whole.
- Spot Weld Drill Bits: The tip of drill bits are welded by carbide.
Classification by Shank types
- Straight-Shank Drill Bits: The diameters of drill bits aresmaller than φ13.0mm, and its shank is straight.
- Taper-Shank Drill Bits: The shank of drill bit is taper shape; in general, the taper of the drill is the Morse.
For related reading：Classification of Drill Bits by Use