Bit clearance

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  1. Technically, the difference between the outside diameter of a set bit and the outside set diameter of the reaming shell. Loosely, the term is used to denote the clearing action of a bit, which is a function of the waterways and the mode in which the diamonds or other cutting media are set in the cutting face of the bit, and also the difference between the outside set diameter of a bit and the outside diameter of the bit shank. Long
  2. Incorrectly and loosely used as a syn. for diamond exposure. See also: diamond exposure

Source: Dictionary of Mining, Mineral, and Related Terms


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