Yokomo YOKBB850C2 - 5x8x2.5mm Ceramic Bearing  [YOKBB850C2]

Yokomo BB-850C2 Ceramic Bearing

The Yokomo YOKBB850C2 is a 5x8x2.5mm ceramic ball bearing made for RC-scale applications where a compact, low-friction bearing is required. As a direct-dimension replacement for standard 5x8x2.5mm bearings, it is intended for use in wheel hubs, gearboxes, motor shafts and other bearing seats on electric RC cars and similar models.

Construction uses ceramic balls combined with steel races to balance hardness and durability with reduced rolling resistance. In practice this reduces bearing drag compared with some all-steel bearings while maintaining compatibility with standard retaining methods and spacings used across common RC components.

Installation tips: press new bearings squarely into hubs or carriers, avoid hammering directly on the inner or outer race, and use a bearing driver or socket sized to the race to prevent race distortion. For removal, use a bearing puller or carefully press out from the opposite side to protect hub threads and sealed parts.

Tuning and maintenance: inspect bearings regularly for grit and wear, clean with a suitable solvent if contaminated, and apply a light bearing oil or grease appropriate for ceramic/steel bearings depending on track conditions and desired gearing response. Ceramic bearings are not maintenance-free; correct lubrication will prolong service life and preserve smoothness.

For builders and tuners replacing small bearings with ceramic alternatives, the BB-850C2 provides a dimension-matched option with lower rolling resistance and compatibility across common RC bearing mounts.