Strength where it’s needed

The Driftmaster offers increased strength through stress reduction in two key ways:

  • The tapered profile provides an increased material cross-section at the base of the threads
  • The asymmetric thread geometry acts to minimize stress concentrations

The lower tooling stress combined with deep case hardening allows for a significant increase in cyclic load handling capability. So, more load cycles mean more drilling time and more underground productivity.

Superior resistance to wear

Optimizing the load distribution and contact area through the tapered profile, the DriftMaster thread geometry is designed to maximize resistance to wear under the harshest drilling conditions.

Combined with the wear resistance associated with carburizing heat treatment, the DriftMaster thread geometry is proven to outlast.

A make-up and breakout advantage

To further improve productivity, the tapered thread profile offers superior rod-bit make-up and breakout characteristics. This key thread feature results in more drilling time.

DriftMaster is being introduced in 35mm hex cross-sections for use with standard, Retrac, and Straightrac button bits from 43mm – 64mm. The initial offering includes dome and pilot reamers – including optional RazorBack™, a patented high-productivity back-reaming bit for quicker and easier mine expansion.

Contact your Boart Longyear representative for additional options.