Engineered for micro-mechanical systems, the 688W4ZZ is a specialized miniature ball bearing that combines high-velocity performance with a custom space-saving profile. This specific "W4" variant features a narrower 4mm width compared to standard 688 bearings, making it the ultimate solution for ultra-compact housings. Fitted with double pressed-steel shields (ZZ), it excellently retains premium lubrication while locking out airborne contaminants, ensuring frictionless, low-vibration rotation for sensitive electronics and precision hobbyist gear.

Engineered for applications demanding a minimal spatial footprint without compromising rotational speed, the 6800-ZZ is a premium thin-section deep groove ball bearing. Featuring dual metallic shields (ZZ), it excels in keeping out particulate matter while retaining essential factory lubrication. Because these steel shields do not make physical contact with the inner ring, the 6800-ZZ delivers drastically lower friction and startup torque compared to rubber-sealed variants, making it the premier choice for 10mm bore applications like gimbal systems, high-rpm drone motors, and micro-robotics.