Hirobo HI2500027 6 x 17 x 6 mm Ball Bearings (2 pcs) for RC Shafts  [HI2500027]

Compact bearing for small RC shafts

This Hirobo HI2500027 set includes two 6 x 17 x 6 mm ball bearings with the 606ZZ marking, intended as low-profile radial supports for small-diameter shafts in RC drivetrains and rotating subassemblies.

Design and role: the bearings cut rotational friction and maintain shaft alignment under radial load to smooth power transfer and stabilize moving parts. The 606ZZ code indicates metal shields on both faces, offering basic protection from light debris while keeping a slim profile.

Installation notes: press each bearing squarely into its bore or onto a sleeve using a soft drift to avoid impacting the inner race, check for free rotation after seating, and preserve any required axial clearance. For service, keep the parts clean and apply a small amount of appropriate bearing oil or grease; avoid overpacking which can increase drag.

Maintenance and tuning: check for play or unusual noise after extended use, replace bearings in matched pairs when wear appears, and consider lighter lubricants or higher-grade bearings if lower friction is needed for high-speed components.