Product Description

Product Introduction
Spiral drill pipes design feature: overlay spiral. It guarantees big torque, quick slagging, and clear hole forming. Besides, the drill bit will hardly get stuck. Application: soft coal bed, and other formation similar to coal bed. The tapered drill rod is 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.
Technical Parameters
Specifications( mm)    Craft    Connection type with drilling machine
Dia.    Length    Thread type        
50-42    500~1500    Taper thread    Friction welding    clamp
63.5-42    500~1500    Taper thread    Friction welding    clamp
63.5-50    500~1500    Taper thread    Friction welding    clamp
73-50    500~1500    Taper thread    Friction welding    clamp
73-63.5    500~1500    Taper thread    Friction welding    clamp
90-63.5    500~1500    Taper thread    Friction welding    Match active drill rod
98-73    500~1500    Hex. Shank    Friction welding    Match active drill rod
110-63.5    500~1500    Taper thread    Friction welding    Match active drill rod
130-63.5    500~1500    Taper thread    Friction welding    Match active drill rod
146-73    500~1500    Taper thread    Friction welding    Match active drill rod