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  2. Benjamin Forstner - Wikipedia

    en.wikipedia.org/wiki/Benjamin_Forstner

    The Forstner bit continues to be manufactured, although it has evolved into a split-ring design. Also, modern Forstner bits normally feature a (non-screw) lead point (AKA "brad point" or "center spur"), unlike Forstner's original, although rim-guided bits are still available from some manufacturers. [2] [better source needed]

  3. Drill bit - Wikipedia

    en.wikipedia.org/wiki/Drill_bit

    Forstner bits have no mechanism to clear chips from the hole, and therefore must be pulled out periodically. Sawtooth bits are also available, which include many more cutting edges to the cylinder. These cut faster, but produce a more ragged hole. They have advantages over Forstner bits when boring into end grain.

  4. Drill bit sizes - Wikipedia

    en.wikipedia.org/wiki/Drill_bit_sizes

    Drill bit sizes are written as irreducible fractions. So, instead of 78/64 inch, or 1 14/64 inch, the size is noted as 1 7/32 inch. Below is a chart providing the decimal-fraction equivalents that are most relevant to fractional-inch drill bit sizes (that is, 0 to 1 by 64ths).

  5. Drill bit (well) - Wikipedia

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

    In the oil and gas industry, a drill bit is a tool designed to produce a generally cylindrical hole in the Earth’s crust by the rotary drilling method for the discovery and extraction of hydrocarbons such as crude oil and natural gas. This type of tool is alternately referred to as a rock bit, or simply a bit. The hole diameter produced by ...

  6. Concealed hinge jig - Wikipedia

    en.wikipedia.org/wiki/Concealed_hinge_jig

    The tool in the image has a total of two cutting edges in this cylinder. Forstner bits have radial cutting edges to plane off the material at the bottom of the hole. [9] The bit in the image has two radial edges. Other designs may have more. Forstner bits have no mechanism to clear chips from the hole, and therefore must be pulled out ...

  7. Drilling - Wikipedia

    en.wikipedia.org/wiki/Drilling

    In some cases, as in holes for rough carpentry, the quality of the hole does not matter, and a number of bits for fast cutting in wood exist, including spade bits and self-feeding auger bits. Many types of specialised drill bits for boring clean holes in wood have been developed, including brad-point bits, Forstner bits and hole saws. Chipping ...

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