BEARING

In Stock

BEARING 5112 3003 78 This is the material found inside the rock drilling bit. It is made of bronze. It is placed on the damping piston like a ring. It serves as a bearing between the middle body of the drill and the damping piston. Therefore, the 5112300378 Bearing prevents damage to the main part. It helps the drill operate longer.

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Description

Full Technical Description

The BEARING 5112 3003 78 (also indicated as 5112300378 and 5112-3003-78) is a mining-grade precision bearing engineered for EPIROC and ATLAS COPCO drilling rigs, ROC-series machinery, and underground jumbos. The BEARING 5112 3003 78 ensures smooth rotational motion for shafts, gears, feed mechanisms, and drifter assemblies subjected to vibration, radial forces, axial forces, and continuous drilling stress.

This BEARING 5112 3003 78 is manufactured from hardened bearing steel with precision-ground raceways and optimized internal geometry for low friction, long service life, and high load endurance even under hydraulic-oil exposure, abrasive dust, and heavy drilling impacts. OEM numbers 5112300378 and 5112-3003-78 confirm OEM-level compatibility.

Function & Operation

The BEARING 5112 3003 78 stabilizes rotating components within drifters, feed drives, hydraulic motors, and gearbox assemblies. Proper bearing function improves drilling accuracy, reduces heat buildup, and extends the lifespan of surrounding components in mining and tunneling applications.

Reliability & Maintenance

Inspect the BEARING 5112 3003 78 for corrosion, pitting, lubrication loss, abnormal noise, or increased play. Replace 5112 3003 78 immediately if vibration or rotational instability develops.