Dimensional Specifications

Set Diameters for Core Bits

The term “set diameter” refers to the dimension measured on the outside or inside diameter of the matrix body on a core bit on which diamonds, tungsten-carbide elements and/or thermally stable polycrystalline (TSP) elements have been physically set in order to preserve this critical dimension during drilling.

Click here to view or download the Nominal Set Diameter and Product Availability Tables in .pdf format. (180kb)

The term “set diameter” refers to the dimension of the outside or inside diameter of the matrix body on a core bit on which diamonds and/or tungsten-carbide elements and/or PCD (TSP) elements have been physically set in order to preserve this dimension during drilling. The specifications for set diameter tolerances to which Dimatec manufactures core bits are given in the tables below.

  • Impregnated synthetic diamond
  • Surface-set natural industrial diamond
  • Thermally stable polycrystalline diamond elements
  • Polycrystalline diamond compacts
  • Tungsten-carbide granular chips
  • Saw-tooth tungsten-carbide elements

Bit sizes that are not listed in our technical literature or bits with non-standard set diameters may be available on request. Note that some types of cutting media may not be available on some sizes of core bits due to the physical dimensional limitations of the bit crown.