Hirobo HI2500118 3 x 6 x 2.5 mm 63ZZ Shielded Bearings Pair  [HI2500118]

Low-profile 3 x 6 x 2.5 mm bearing engineered for tight assemblies

Supplied as two pcs, these 3 x 6 x 2.5 mm shielded ball bearings (63ZZ) are intended for RC helicopter components where a slim bearing section is needed. The metal shields minimise contamination while allowing periodic light lubrication.

Common installation points include compact gearboxes, rotor head linkages, swashplate assemblies and tail shaft supports where reduced friction and accurate pivoting are essential. The 63ZZ shields reduce dust ingress while preserving easy access for inspection and lubrication.

Service and longevity tips: always check bore tolerances before pressing, use a suitable press or drift on the outer race, and avoid impact loading on the inner ring. Keep lubrication light and inspect rotation and axial play after fitting. Replace with matching size and shield type to retain original performance characteristics.