BALL BEARING

The 550 870 09 BEARING, BALL (55087009, 550-870-09, BALL BEARING 55087009) is a mining-duty precision bearing engineered for Sandvik drilling rigs, ROC series machinery, and underground jumbos. The 550 870 09 BEARING, BALL provides high-accuracy rotational support for shafts, gears, and mechanical assemblies exposed to extreme vibration, radial load, axial load, and continuous drilling forces.

This 550 870 09 BEARING, BALL is made from hardened bearing steel with optimized raceway geometry, precision-ground balls, and low-friction lubrication channels to ensure maximum load capacity and long service life. OEM identifiers 55087009 and 550-870-09 guarantee compatibility across Sandvik parts systems.

The 550 870 09 BEARING, BALL minimizes rotational resistance, stabilizes shaft alignment, reduces heat generation, and supports efficient energy transfer in drifter systems, hydraulic motors, gear drives, and feed mechanisms. Proper bearing performance improves drilling accuracy, reduces mechanical noise, and extends equipment lifespan in mining and tunneling environments.

Inspect the 550 870 09 BEARING, BALL for pitting, corrosion, lubrication loss, abnormal noise, or excessive play. Replace 550 870 09 immediately if vibration increases or rotational smoothness declines.