PDC ROOF BOLT DRILL BITS

Two wings type

Size: Φ25-Φ42 mm

Screw size: 14x1.5; 14x2; 16x2

Applied for wide range of rock formation, vastly improved efficiency, with features like long drill life, nice wear resistance of wing, strong shock resistance, no need repeat repair and grinding.

 

Three wings type

Perfect stability in penetration and drilling, four water-discharging holes, fast chip discharging, is two times fast as two wings type when drill hard rock formation, best performance when at f=8-15 rock formation.