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Reaming button bits were widely used in quarry or mining for blast hole drilling.
With Pilot adaptors, the drilling direction can be ensured and accurate.
Bit type:Dome bit / Reaming bits
Connection Angle:6 / 10 / 12 degree
Diameter of Pilot adaptors:26 / 28 / 35 / 40 mm etc
Diameter of reaming button bits:60 / 64 / 70 / 76 / 80 / 89 / 102 / 127 / 150
Thread type:R25 / R28 / R32 / R38
