Hirobo HI2500118 3 x 6 x 2.5 mm Bearing Pair compatible with Hirobo rotor parts  [HI2500118]

Compact 3 x 6 x 2.5 mm 63ZZ bearing for precision RC parts

This item includes two 3 x 6 x 2.5 mm shielded ball bearings (63ZZ) supplied as two pcs for RC helicopter applications. The slim profile and shielded design are intended for narrow mounting spaces and lightweight rotating links.

Typical uses on a helicopter model include small gearbox shafts, rotor head pivots, swashplate linkages and tail unit pivots where low friction and accurate movement are important. The metal shields on both faces help keep grit out while permitting occasional light lubrication and inspection.

Fitting advice: verify both inner and outer fits before pressing, use even axial pressure on the outer race during installation, and refrain from striking the inner race. Apply only light lubrication if necessary and confirm the bearings run smoothly with no detectable play prior to reassembly. Replace with the same size and shield type to preserve handling characteristics.