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2. Watts Brothers Tool Works - Wikipedia

   en.wikipedia.org/wiki/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. It is used together with ...

3. Reuleaux triangle - Wikipedia

   en.wikipedia.org/wiki/Reuleaux_triangle

   The Watts Brothers Tool Works square drill bit has the shape of a Reuleaux triangle, modified with concavities to form cutting surfaces. When mounted in a special chuck which allows for the bit not having a fixed centre of rotation, it can drill a hole that is nearly square. [33]

4. Hughes Tool Company - Wikipedia

   en.wikipedia.org/wiki/Hughes_Tool_Company

   Automation replaced handiwork, and the company standardized on drill bit sizes, while embarking on an advertising campaign. The company also opened plants in Ireland and West Germany, taking advantage of cheaper labor, and lower transportation costs to clients in Saudi Arabia and Russia. Profits for the next 8 years amounted to $285,000,000.

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6. Howard R. Hughes Sr. - Wikipedia

   en.wikipedia.org/wiki/Howard_R._Hughes_Sr.

   The manufacturing operations of Hughes' Sharp-Hughes Tool Company at 2nd and Girard Streets in Houston, Texas. Hughes Sr. married Allene Stone Gano, on June 24, 1904, in Dallas County, Texas, and engaged in various mining business endeavors before capitalizing on the Spindletop oil discovery in Texas, as a result of which he began devoting his full time to the oil business.

7. Drill - Wikipedia

   en.wikipedia.org/wiki/Drill

   Drill presses are almost always equipped with more powerful motors compared to hand-held drills. This enables larger drill bits to be used and also speeds up drilling with smaller bits. For most drill presses—especially those meant for woodworking or home use—speed change is achieved by manually moving a belt across a stepped pulley ...