Watts Brothers Tool Works
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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][4] Similarly, the company also manufactures drill bits for other angular holes such as pentagons and hexagons.
References
- ^ Ragan, Sean Michael (October 6, 2009). "Drilling square holes with a Watts dril". MAKE Magazine. Retrieved February 23, 2016.
- ^ Watts Brothers Tool Works (1950–1951). How to drill square hexagon octagon pentagon holes. New York: Wilmerding, Pa. : The Company,.
{{cite book}}: CS1 maint: extra punctuation (link) - ^ Watts, Harry J., "Drill or Boring Member", U.S. patent #1,241,176, applied for November 1, 1916, granted September 25, 1917.
- ^ Scott Smith:"Drilling Square Holes", in The Mathematics Teacher, October 1993 (Volume 86 Number 7).
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