Carbide Cutting Picks for Earthmoving & Drilling ...
2021-6-3 · Investigation of optimum thrust, cutting speed, and water pressure for tungsten carbide and polycrystalline diamond compact roof- bolt drill bits. ... Test results show that for both types of bits, penetration rate increased when thrust was raised from 227 to 1,588 kg. When water pressure rose from 554 plus or minus 120 to 1,344 plus or minus ...
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