... been grinding out, work on a new outcrop of the diamond, similar to the grinding of metallic materials. Matrix has a ... , through the removal of cuttings and cool the drill bit with a rinse. Most of the impregnated diamond bit is the use ... 40 degrees respectively, to adapt to different strata. Hot pressing diamond bit general dimensions: φ 75, 91, 110, 130, 150, 171, 200 ...