• 688 is an ultra-thin miniature thin-wall deep groove ball bearing with standard dimensions 8*16*5mm. Its ultra-slim cross-section greatly saves installation space for compact lightweight equipment. Three versions are available: open type, ZZ double steel dust shield and 2RS rubber contact seal to adapt to different working environments from clean dry space to dusty and splash-prone scenarios. Sealed variants are pre-filled with long-life high-temperature grease at factory for maintenance-free use. The deep groove raceway enables stable radial load bearing and tiny bidirectional light axial loads, supporting continuous ultra-high speed and low-vibration quiet rotation. It is a universal micro rotary component widely adopted in all kinds of miniature light-load precision mechanical transmission devices.

*Send us your inquiry now to get samples and the latest factory quotation for 688 bearings.

• Ultra thin wall & tiny compact size, perfectly fit limited narrow installation space
• Multiple optional seal structures: Open, ZZ dustproof steel shield, 2RS waterproof rubber seal
• Ultra high limiting speed, stable low-noise and low-vibration running performance
• Factory pre-lubried for ZZ and 2RS sealed types, no secondary refueling required
• Standard C0 clearance; C3 enlarged clearance optional for high-temperature & high-speed working conditions
• P0 precision as standard grade, P6 high precision available on customer request

• Finger skateboards, toy wheels and miniature roller toys
• Micro cooling fans and portable tiny ventilation devices
• Precision optical instruments and small measuring equipment
• Mini micro motors and portable power small components
• Facial massage beauty tools and cosmetic mini devices
• Light miniature conveyor and small precision transmission machinery

*Contact our engineering team today for professional bearing selection guidance and technical parameters.

• Made of high-purity GCr15 chrome bearing steel with complete standardized heat treatment to ensure high hardness and outstanding wear resistance.
• Superfinished raceways and steel balls deliver ultra-quiet, smooth high-speed rotation with long service life.
• Strict full dimensional inspection for miniature bearings to guarantee consistent precision and stable tolerance.
• Large ready stock of 688 thin wall bearings, support small sample orders and fast bulk shipment worldwide.
• Accept OEM laser marking, customized packaging and multi-seal mixed batch supply for global wholesale buyers.

*Place bulk orders with GQZ, enjoy stable stock, short lead time and reliable after-sales service.