12HH CHUCK S

12HH CHUCK S 3760 0024 92 is a heavy-duty 12HH chuck assembly designed for secure drill steel gripping on Epiroc and Atlas Copco drilling rigs, ROC-series machines, and underground jumbos. This chuck is responsible for firmly holding the drill rod during rotation and percussion, ensuring efficient energy transfer from the drifter to the rock face.

The 12HH CHUCK S 3760 0024 92 is manufactured from high-strength, wear-resistant alloy steel to withstand extreme impact loads, continuous vibration, abrasive rock dust, and hydraulic oil exposure common in mining and tunneling environments. Its precision-machined internal geometry ensures reliable clamping force and minimizes slippage during drilling operations.

A worn or damaged chuck can cause drill steel slipping, reduced penetration rates, abnormal vibration, and accelerated wear on the shank adapter and rotation components. Maintaining the chuck in good condition is critical for drilling accuracy, productivity, and overall machine safety.

During maintenance, the chuck should be inspected for jaw wear, cracking, loss of clamping force, and contamination buildup. Replacement should be carried out according to the manufacturer’s service procedures to ensure correct alignment and reliable operation.