ST68 threaded bit extension rod

ST68 threaded bit extension rod for mining drill jumbo

The ST68 threaded bit extension rod can efficiently and reliably transmit the powerful impact energy and torque generated by the drilling rig to the rock surface, thereby achieving high drilling speed and excellent borehole straightness.

Contact Us
Description

The ST68 Threaded Bit Extension Rod

The ST68 threaded bit extension rod is specifically designed to be used with high-power hydraulic top hammer drilling rigs.

Technical Information

Length

  • 1525 mm and 1830 mm

Weight

  • Ranges from 35.5 kg to 41.6 kg

Specification

  • Female thread (internal thread) ST68 round 87 mm to male thread (external thread) ST68

Material

  • High-strength alloy structural steel, 23CrNi3Mo

Manufacturing Process

  • Forging process
  • Full carburizing process
  • High-frequency treatment process
  • Phosphating process
Technical Parameters
ST68 threaded bit extension rod for mining drill jumbo
Extension rodL (mm)L (foot)D (mm)D (inch)ThreadOrder numberWeight (kg)

ST68-D87-ST68 drill tube

ST68-D87-ST68 drill tube

15255873 1/2ST68B2A0-8715-2B2B35.5
18306873 1/2ST68B2A0-8718-2B2B41.6
download

ST68 threaded bit extension rod for mining drill jumbo