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2. Hughes Tool Company - Wikipedia

   en.wikipedia.org/wiki/Hughes_Tool_Company

   The company was established in December 1908 [1] as Sharp-Hughes Tool Company when Howard R. Hughes Sr. patented a roller cutter bit that dramatically improved the rotary drilling process for oil drilling rigs. He partnered with longtime business associate Walter Benona Sharp to manufacture and market the bit.

3. 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.

4. Cutting tool (machining) - Wikipedia

   en.wikipedia.org/wiki/Cutting_tool_(machining)

   Linear cutting tools include tool bits (single-point cutting tools) and broaches. Rotary cutting tools include drill bits, countersinks and counterbores, taps and dies, reamers, and cold saw blades. Other cutting tools, such as bandsaw blades, hacksaw blades, and fly cutters, combine aspects of linear and rotary motion. The majority of these ...

5. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   Nowadays, the drill bit is usually made by rotating the bar while moving it past a grinding wheel to cut the flutes in the same manner as cutting helical gears. Twist drill bits range in diameter from 0.002 to 3.5 in (0.051 to 88.900 mm) [9] and can be as long as 25.5 in (650 mm). [10]

6. Grinding machine - Wikipedia

   en.wikipedia.org/wiki/Grinding_machine

   A grinding machine, often shortened to grinder, is any of various power tools or machine tools used for grinding. It is a type of material removal using an abrasive wheel as the cutting tool. [1] Each grain of abrasive on the wheel's surface cuts a small chip from the workpiece via shear deformation.

7. Ultrasonic/sonic driller/corer - Wikipedia

   en.wikipedia.org/wiki/Ultrasonic/sonic_driller/corer

   The drill uses a piezoelectric actuator as its source of power, and utilizes a variety of 'horns' to vibrate, or hammer, its bit through the material. [ 1 ] [ 2 ] A prototype of the drill was first released by NASA in April 2000, which weighed 1.5 lb. (.7 kg) and had the capacity to drill half-inch holes into granite using only 10 watts of ...