This category introduces R28 threaded drill tools for tunneling jumbos, including extension drill rods, piloted reamer bits, cross bits, and button bits.

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R28 and hexagonal extension drill rod

R28 and hexagonal extension drill rod for tunneling tools

R28 cross and button drill bit

R28 cross and button drill bit for drifting and tunneling

R28 piloted reamer bit

R28 piloted reamer bit with 35 angle for drifter rod

R28 tunneling jumbo drill tools installation diagram

R28 tunneling jumbo drill tools installation diagram