WEARING PIECE

235 083 08 WEARING PIECE Located within the drifter's gear housing, this eccentric bearing is fundamental to the rotation system. It converts the smooth input from the rotation motor into the indexed, step-by-step turning of the shank adapter and drill string. This action is what allows the drill bit to strike a new section of rock with each piston impact, which is essential for effective penetration.

A failure in the rotation mechanism often traces back to a worn or damaged eccentric bearing. If this component seizes or develops excessive play, the drill steel may stop turning or rotate erratically. This directly results in poor drilling performance, slower advance rates, and a high risk of getting the drill steel jammed in the hole, causing significant operational delays.

Listen for any unusual grinding or clicking sounds from the drifter, as this can indicate a developing bearing issue. During a scheduled drifter overhaul, this bearing should always be carefully inspected for pitting or wear. To maximize its service life, ensure the drifter's lubrication system is functioning correctly with the specified oil.