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  2. Annular cutter - Wikipedia

    en.wikipedia.org/wiki/Annular_cutter

    The cost of a core drill is high compared to a twist drill, but the cost per hole made with the core drill is less as compared to twist drills, this is because a single core drill makes 5 to 10 times more holes than a twist drill. [9] Annular cutters are more fragile than a drill bits of the same diameter and may thus shatter more easily.

  3. 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 ...

  4. Cutting tool material - Wikipedia

    en.wikipedia.org/wiki/Cutting_tool_material

    Cutting tool materials are materials that are used to make cutting tools which are used in machining (drill bits, tool bits, milling cutters, etc.) but not other cutting tools like knives or punches. Cutting tool materials must be harder than the material of the workpiece, even at high temperatures during the process.

  5. Diamond tool - Wikipedia

    en.wikipedia.org/wiki/Diamond_tool

    Construction: Medium or small sized diamond saw blades, diamond core drill bits and some diamond grinding or polishing tools are often used in repairing roads, remodeling buildings, and processing building materials. Woodworking: Composite laminate flooring is widely used. It is wearable as stone.

  6. 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.

  7. High-speed steel - Wikipedia

    en.wikipedia.org/wiki/High-speed_steel

    It is usually used to manufacture a variety of tools, such as drill bits, taps and reamers. 1.3343 is the equivalent numeric designation for M2 material identified in ISO 4957. M7 M7 is used for making heavier construction drills where flexibility and extended drill life are equally important. M50

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