Rock drilling tools manufacturer ProDrill offers rock drill bits: T51 Threaded Button Bits are the most important size for benching and long-hole drilling underground.

Diameter: 76mm, 89mm, 102mm

Skirt body: retrac, and normal, straightrac

Face type: flat, uniface, Drop Center

Carbide shape:  Dome, ballistic, semi-ballistic

For bench drilling, underground long hole drilling

To match extension MF rod, MM rod heavy duty top hammer.

14 Semi-ballistic/parabolic carbide inserts T51 threaded drill bit with drop center face, 102mm diameter match with extension drill rod for bench drilling and long hole drilling underground.

For more details please download PDF: T51 Drill Bits for Bench Drilling, Long Hole Drilling Underground Catalogue

T50 Power ROC