High Roller Series Bits

Built upon a proven platform, Varel continues to advance roller cone innovation through the introduction of its High Roller large diameter roller bearing drill bit series.

Highly engineered roller bearing

Optimized for large diameter bits, Varel systematically improved and enhanced its roller bearing package. This larger, anti-friction bearing package assists in reducing heat generation and bearing torque for higher RPM runs. To support this new bearing package a high viscosity grease is employed for further friction reduction.

Patented conical seal gland design

The conical seal gland's geometry positions the seal to better handle pressure fluctuations and still maintain a preferred dynamic sealing interface. In addition, the overall dimension of the seal has been increased compared to previous large diameter roller bearing bits, resulting in longer bit life.

Increased capacity reservoir design

To increase lubricant volume, a larger grease reservoir was designed for the series. The new design increases the grease volume compared to the previous design.

Redesigned head forgings

Larger, stronger forgings were developed and deployed for this large diameter series. These rugged and dependable forgings provide long-lasting drill bit performance. 

Download High Roller Series Bit Brochure