BEARING, BALL

560 349 52 BEARING, BALL Inside a rock drill's rotation unit, this ball bearing carries the loads from a rotating shaft, allowing it to spin freely with minimal resistance. It handles both the radial forces and axial thrust that occur during drilling. Proper function of this bearing is essential for transferring torque efficiently to the drill string and maintaining the alignment of the drivetrain components.

A worn or failing bearing can lead to serious operational problems. You might notice a high-pitched whining or grinding sound from the drifter, or the rotation unit might feel unusually hot after a short period of operation. This wear can cause the drill steel to wobble during collaring, leading to inaccurate holes and increased stress on the entire feed system. Eventually, a seized bearing will cause a complete stoppage and can damage expensive parts like gears and motor shafts.

Listen for unusual noises from the drifter as an early sign of bearing wear. During a major service or overhaul of the rotation unit, it is standard practice to replace these bearings. Always press a new bearing in using the correct tools on the proper race to avoid damaging the balls or raceways upon installation.