Coal Cutting Drill Bits

Coal Cutting Tools Coal Cutting Drill Bits Bullet Bit Tungsten Carbide Coal Mining Tools Product performance; Alloy steel Body, made by material ASTM4142 or 42CrMo,heat treatment with 40-44HRC hardness, has high toughness and wearable character. The unimate round shank bit,rock drilling teeth,tungsten carbide drill rock bit adapt to the machine with all the performance features such as a high feed rate,a long service life and short tool changing times.Together with the parts