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The coal cutting drill bits are direct cutting tools for shearers and roadheaders. The working conditions are very harsh. The traditional picks are subjected to the friction and impact of coal seams or rocks during use.
Reaming drill. Reaming drills have 3 to 4 teeth and are more rigid than twist drills to expand existing holes and improve dth drilling tools accuracy and finish.
All the composite pieces of the coal cutting drill bits have been carefully selected by experienced composite manufacturers, all of this have been purchased by excellent products
- T51 89mm, normal body, flat face, spherical button 20pcs - T51 89mm, retrac body, flat face, spherical button 20pcs
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