688zz
600 Series Miniature Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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688zz Bearing Product Overview & Core Advantages
The 688zz is a metric single row deep groove ball bearing designed for high-performance applications requiring compact design and reliable operation. This shielded bearing excels in handling radial loads and is manufactured to ABEC1 precision tolerances, ensuring consistent performance and smooth rotation. Its construction from chrome steel rings and balls, combined with a stainless steel cage, provides excellent durability and corrosion resistance, making it a versatile and cost-effective solution for various industrial and precision mechanisms.
688zz Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 688 | Bearing series and size designation (8mm bore, 16mm OD, 5mm width) |
| zz | Bearing is equipped with shielded seals on both sides to protect against contamination |
688zz Bearing Structural Features & Performance Benefits
- High Load Capacity & Rigidity: The single row deep groove raceway geometry is optimized to support significant radial loads (dynamic: 239 lbf / static: 107 lbf), providing stable and rigid support for rotating shafts.
- Optimized High-Speed Performance: The lightweight stainless steel cage effectively guides the 10 precision balls, minimizing friction and enabling a high limiting speed of 36,000 rpm.
- Enhanced Contamination Protection: The 300 series stainless steel shields (zz) on both sides retain lubricant and protect the internal components from dust and debris, extending service life.
- Precision Engineering: Manufactured to ABEC1 tolerance class with a controlled radial internal clearance (MC3 group: 0.002mm to 0.013mm), ensuring smooth, quiet, and low-vibration operation.
688zz Bearing Typical Application Areas
The 688zz bearing is ideally suited for a wide range of compact and high-speed applications, including:
- Small Electric Motors: Used in fans, blowers, and small power tools.
- Precision Instruments: Optical encoders, medical devices, and laboratory equipment.
- Office Automation Equipment: Printers, scanners, and copiers.
- Robotics and Automation: Small joints, guides, and drive mechanisms.
