Tapered Drill Rods
Shank H22x108mm (7/8 x 4 1/4 )
Length: 610mm - 2800mm
Taper: 4.8, 6, 7, 11, 12

 

The tapered drill rods are used for rock drilling, blasting holes and other drilling works in the quarries, coal mines, traffic and other constructions.
Generally, the lightduty rock drill uses 7 taper or smaller taper angle, the heavyduty rock drill mainly uses 12 taper angle.