688ZZ Ball Bearing
688ZZ Deep Groove Ball Bearing – 8mm inner diameter, 16mm outer diameter, 5mm width, double metal-shielded miniature bearing designed for high-speed, low-friction performance in compact mechanical assemblies.
The 688ZZ is a miniature deep groove ball bearing featuring metal shields on both sides (ZZ) to protect against dust and debris while allowing high-speed rotation with minimal friction. Its dimensions are 8mm (inner diameter) × 16mm (outer diameter) × 5mm (width), making it suitable for small-scale, high-precision applications with light to moderate radial loads.
Typically manufactured from chrome steel (GCr15), the 688ZZ is pre-lubricated with grease, offering smooth operation and extended service life with minimal maintenance. The deep groove raceway design supports both radial and limited axial loads, and the non-contact metal shields enable higher rotational speeds compared to rubber-sealed variants.