diamond reamer

diamond reamer

[′dī·mənd ‚rēm·ər]
(design engineering)
A diamond-inset pipe behind, and larger than, the drill bit and core barrel that is used for enlarging boreholes.
References in periodicals archive ?
Tenders are invited for Supply Of H And N Size Imp Bit And Nq Diamond Reamer Shell
Here," says Mr Maichele, "we finish ream the stem cavity with a polycrystalline diamond reamer, mill the threads--rather than tap them in order to get better pitch control--chamfer the outside edges and drill two small mounting holes needed in assembly for a 4-40 thread self-tapping screw.
They have researched polycrystalline diamond reamers and gunreamers with cubic boron nitride (BZN) inlays.