R32 R38 Retractable Drill Bit Diameter 45 - 89mm For Drifting / Tunneling

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R32 R38 Retractable Drill Bit Diameter 45 - 89mm For Drifting / Tunneling

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R32 R38 Retractable Drill Bit Diameter 45 - 89mm For Drifting / Tunneling

Description Button bit is well known for its high wear resistance on soft to medium-hard rock formations (between 55 Mpa to 165 Mpa compressive strength). Featuring spherical tungsten carbide inserts ...

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stone drilling bits

spherical drill bit

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