Watts Brothers Tool Works

Watts Brothers Tool Works is a tool manufacturer located in Wilmerding, Pennsylvania. They are known for manufacturing drill bits that can drill square holes,[1][2] including blind holes which cannot be made with other methods such as broaching. The Harry Watts square drill bit is based on a Reuleaux triangle shape, and is used together with a guide and a special chuck to make a square hole.[3] Similarly, the company also manufactures drill bits for other angular holes such as pentagons and hexagons.

References

  1. ↑ Drilling Square Holes
  2. ↑ Watts Brothers Tool Works (1950–1951). How to drill square hexagon octagon pentagon holes. New York: Wilmerding, Pa. : The Company,.
  3. ↑ Watts, Harry J., "Drill or Boring Member", U.S. patent #1,241,176, applied for November 1, 1916, granted September 25, 1917.


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