Q14-102-ST58 Retract Bit

Rock drilling tools factory Bloom manufactures high quality rock drill bits, one of the most important size for benching and long-hole drilling underground is ST58 Threaded Button Bit

Diameter: 76mm, 89mm, 102mm

Skirt body: retrac, and normal, straightrac

Face type: flat, uniface, Drop Center

Carbide shape: Dome, ballistic, semi-ballistic

Used in bench drilling, underground long hole drilling to match extension MF rod, MM rod heavy duty top hammer drilling tools.

ST58 Uniface Retrac Threaded Button Bit

13 Semi-ballistic carbide inserts ST58 threaded drill bit with uniface face design, 89 mm diameter match with extension drill steels. Uniface bits are well suited for drilling straighter holes in less abrasive and less consolidated rock at a faster rate.