Q18-89-ST58-RC-Threaded Button Bit

ST58 Threaded Button Bits are the most important size for benching and long hole drilling underground, this type of rock drill bits manufactured by rock drilling tools factory Bloom.

Diameter: 89mm, 93mm, 102mm, 115mm, 127mm

Skirt Body: retrac, and normal, straightrac

Face type: flat, uniface, drop center

Carbide Design: Dome, ballistic, semi-ballistic

Used in bench drilling, underground long hole drilling

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

Features:

ST-58 thread type is double thread design for easy knock off drill bit, ST-58 means diameter 58 mm with double T shape thread, thread distance 24 mm, this is extra heavy duty drill bit for jump top hammer. Drill rod use guide tube for a match.

18 Dome/Semi-ballistic carbide inserts ST58 Threaded drill bits with flat face design, 89 mm diameter with extension rod for heavy duty drilling.