Hirobo HI2500050 Shielded Ball Bearings 3x8x4 mm (2 pcs)  [HI2500050]

3x8x4 mm Bearing Pair Details

This RC ball bearing kit includes two 3 x 8 x 4 mm bearings, stamped 693ZZ to indicate shielded faces. They are suitable as replacement bearings in helicopter general parts where the specified bore, outer diameter and width match existing hubs or carriers. Their small footprint and shielded design help limit contamination while allowing smooth rotation in low- to moderate-load areas such as small drive trains and rotor fittings.

Fitment advice: check shaft and bore clearances before installing, press the bearing in squarely using a bearing tool or soft driver that bears on the outer race, avoid striking the inner race, and confirm unobstructed rotation and minimal axial play once fitted. Regular inspection of the shields and a manual spin test will reveal any contamination or roughness.

Included: 2 pcs, 3 x 8 x 4 mm, marked 693ZZ.