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What's the usage of the Coal Drill Bit? May 18, 2017

Coal drill bit match with coal drill pipe,Mainly used for coal drill, and wind coal drilling machine.According to the diameter of the two wings, can be divided into:28 coal drill bit,30 coal drill bit,32 coal drill bit,38 coal drill bit,42 coal drill bit. 


The material is mainly cemented carbide.Hardness is divided into two type,Type I is suitable for soft rock drilling,Type II is suitable for hard rock and hard rock drilling.Coal drilling with compact bit used in coal seam drilling excavation.In general, the rock formation is relatively soft,so Compact bit used in large quantities.Such as anchor bit, three-wing drill bit, etc.


pdc 3 wing anchor shank drill bit 03.jpg


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