Pilot Hole Bits

Premium Sealed Bearing Pilot Hole Bits

Varel International’s oil field and mining experience provide a selection of sealed bearing journal bits designed for drilling the most demanding raise bore pilot holes, blind bore pilot holes, and underground drill and blast holes.

Each bit is designed with a premium sealed bearing system including a pressure compensator. The premium bearing package features advanced metallurgy with frictional elements silver plated to reduce frictional heat generation and provide resistance to galling under high loads. O-ring seals made from a proprietary HSN elastomer provide extremely long seal life.

The series features blunt dome shaped inserts to provide a durable cutting structure for maximum crushing and chipping action while minimizing wear. Our bits utilize conical and/or chisel shaped inserts for increased penetration rates in softer formations. Extra hardmetal and carbide inserts are installed in the surface of the shirttail to provide superior seal protection.