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2. Hughes Tool Company - Wikipedia

   en.wikipedia.org/wiki/Hughes_Tool_Company

   Hughes Tool Company was an American manufacturer of drill bits. Founded in 1908, [1] it was merged into Baker Hughes Incorporated in 1987. History.

3. Drill bit sizes - Wikipedia

   en.wikipedia.org/wiki/Drill_bit_sizes

   Fractional drill bit set by Craftsman. Fractional-inch drill bit sizes are still in common use in the United States and in any factory (around the globe) that makes inch-sized products for the U.S. market. ANSI B94.11M-1979 sets size standards for jobber-length straight-shank twist drill bits from 1/64 inch through 1 inch in 1/64 inch increments.

4. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   From top: Spade, brad point, masonry, and twist drills bits Drill bit (upper left), mounted on a pistol-grip electric drill A set of masonry drills. A drill bit is a cutting tool used in a drill to remove material to create holes, almost always of circular cross-section. Drill bits come in many sizes and shapes and can create different kinds of ...

5. Howard R. Hughes Sr. - Wikipedia

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

   On November 20, 1908, he filed the basic patents for the Sharp-Hughes Rock Bit, and on August 10, 1909, was granted U.S. patent 930,758 and U.S. patent 930,759 for this rock drill. Hughes's two-cone rotary drill bit, nicknamed "rock eater", penetrated medium and hard rock with ten times the speed of any former bit, and its development ...

6. Irwin Industrial Tools - Wikipedia

   en.wikipedia.org/wiki/Irwin_Industrial_Tools

   In 2003, American officially changed its name to Irwin Industrial Tool Company. [ 8 ] In 2008, Irwin announced the closing of its DeWitt, Nebraska plant, ending 80 years of American production for Vise-Grips, citing a necessity to move production to China "to keep the Vise-Grip name competitive."

7. Drill bit (well) - Wikipedia

   en.wikipedia.org/wiki/Drill_bit_(well)

   These bits mainly fall into two classes depending on the manufacture of the cutting elements or "teeth". Steel-tooth bits have cones that have wedge-shaped teeth milled directly in the cone steel itself. Extremely hard tungsten carbide material is often applied to the surfaces of the teeth by a welding process to improve durability.