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Pilot Hole Bits

Terelion’s pilot hole bits have been designed for the most demanding raise bore pilot holes and blind bore pilot holes. All pilot hole bits incorporate a premium sealed bearing system with pressure compensation for added durability.

A range of sealed journal and roller bearing bits designed for drilling the most demanding raise bore pilot holes and blind bore pilot holes.

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Features and benefits

Cooler Running Bearings
Advanced metallurgy with silver plated frictional elements to reduce heat generation and provide resistance to galling under high loads.

Engineered Bearing Seals
O-ring seals made from a proprietary HSN elastomer for long seal life.

Custom Cutting Structures
Blunt, dome-shaped inserts that provide a durable cutting structure for maximum crushing and chipping action and minimal wear. Conical and/or ovoid-shaped inserts are design for accuracy and gage holding.

Shirttail Protection
Extra hard metal and carbide inserts in shirttail surface provide superior seal protection.

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