688ZZ Miniature Bearing - The "Precision Core" for High-Speed Compact Systems
【Accurately match your device requirements 】
In the realm of high-speed micro-motors and compact transmission systems, minimizing friction while maintaining structural integrity is paramount. The 688ZZ bearing, with its space-saving dimensions of 8mm inner diameter, 16mm outer diameter, and 5mm width, is engineered to meet these rigorous spatial constraints. Unlike sealed variants, the metal shield design (ZZ) offers a unique balance of protection and speed, ensuring exceptional performance in environments where low torque and high RPM are critical. This bearing is not merely a rotating part; it is a precision solution designed for resilience against minor contaminants while delivering whisper-quiet operation.
| Item | Specification | Item | Specification |
| Model | 688ZZ | Applications | Micro Motors, Drones, Hard Drives, Toys |
| Dimensions | Inner Diameter (d): 8mmOuter Diameter (D): 16mmThickness (B): 5mm | Radial Clearance | C0 (Standard), C2, C3 Available |
| Seal Type | ZZ (Double Metal Shields) | Precision Grade | ABEC-1 (Standard), ABEC-3, ABEC-5, ABEC-7 |
| Material | GCr15 Bearing Steel / Chrome Steel | Construction | Single Row, Deep Groove Ball Bearing |
| Sample Policy | Free Samples Available, | Place of Origin | Wuxi, China |
Port of Shipment | Any Port in China (Sea/Air) | Delivery Terms | FOB / CIF / EXW (Sea or Air) |
【Technical Hard Power - Why Choose Us】
Robust Sealing Performance: Designed for environments where dust protection and low friction must coexist, the 688ZZ features double metal shields. Unlike rubber-sealed bearings, these metal shields do not contact the inner ring, significantly reducing rotational resistance and allowing for higher speed limits, while still effectively blocking larger particles from entering the raceway.
Optimized for High Rotational Speed: The 688ZZ series is distinctively known for its ability to handle extreme rotational speeds compared to sealed counterparts. Through precision grinding and heat treatment (hardness HRC 60-65), the bearing maintains dimensional stability even under high-velocity stress, making it ideal for high-RPM spindles and cooling fans.
Low Friction & Energy Efficiency: For battery-powered devices where every milliwatt counts, our 688ZZ bearings are manufactured with strict tolerance controls on the raceway surface finish. This reduces rotational torque, lowering power consumption and heat generation. We utilize vacuum-degassed GCr15 steel, which significantly reduces oxygen content and non-metallic inclusions, resulting in a denser microstructure for superior fatigue resistance.
【Application Scenarios - Solving Your Industry Pain Points】
RC Hobby & Drones:
Issues: High vibration and extreme RPM requirements during flight can destroy inferior bearings.
Solution: The 688ZZ offers a robust yet lightweight cross-section that provides excellent load-carrying capacity. The metal shields protect the internals from track dust or outdoor debris without sacrificing the speed needed for peak motor performance throughout the race.
Computer Cooling Fans:
Issues: Need for silent operation and long lifespan without grease leakage.
Solution: Our high-precision grades (ABEC-5/ABEC-7 available) ensure near-silent operation with negligible vibration. The shielded design retains high-quality grease effectively, preventing drying out while keeping contaminants out, ensuring the fan runs smoothly for thousands of hours.
Industrial Micro-Motors:
Issues: Continuous 24/7 operation leads to heat buildup and potential grease degradation.
Solution: The 688ZZ is packed with high-quality lithium complex grease that withstands elevated temperatures. The non-contact metal shields allow heat to dissipate more effectively than rubber seals, providing a "maintenance-free" lifecycle for conveyor sensors or small gearboxes.
【Commitment to Quality】
"Quality is not an act, it is a habit."
Every 688ZZ bearing leaving our facility represents our dedication to rotational perfection. We don't just sell steel rings; we deliver reliability. 100% Acoustic & Dimensional Testing: We employ advanced vibration testing machines (Vibration Level Z1, V1, or higher) to ensure that every single bearing meets low-noise standards. No noisy bearings are shipped.Traceability: Each batch is tracked from raw material to finished product, ensuring full accountability and consistency. Technical Support: Our engineering team is ready to assist with fitment advice, grease selection, or custom modification requests to ensure our bearing integrates perfectly into your design.Make your equipment run more stably, longer and safer.
