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
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- ↑ Drilling Square Holes[dead link]
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Watts, Harry J., "Drill or Boring Member", U.S. patent #1,241,176, applied for November 1, 1916, granted September 25, 1917.
