S689
600 Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Inner Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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S689 Bearing Product Overview & Core Advantages
The S689 is a metric miniature ball bearing designed for precision applications requiring compact dimensions and reliable performance. As a single row deep groove ball bearing, it excels at handling primarily radial loads while also accommodating moderate axial loads in both directions. Manufactured entirely from stainless steel, it offers excellent corrosion resistance. Its compact design, with a 9mm bore and 4mm width, makes it ideal for applications where space is at a premium, while its ABEC1 precision class ensures consistent and smooth operation.
S689 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Stainless Steel construction for rings, balls, and cage. |
| 6 | Single Row Deep Groove Ball Bearing series. |
| 89 | Bore Diameter code for 9mm. |
| (No Seals/Suffixes) | This is an open bearing, requiring external lubrication and protection from contaminants. |
S689 Bearing Structural Features & Performance Benefits
Compact & Lightweight Design: With a minimal cross-section (4mm width) and a weight of only 3.41g, the S689 is engineered for miniature applications without sacrificing performance.
High-Speed Capability: The stainless steel cage and optimized internal geometry contribute to a high limiting speed of 32,400 rpm, making it suitable for high-speed spindles and rotors.
Corrosion Resistance: The all-stainless-steel construction (rings, balls, cage) ensures reliable operation in humid or mildly corrosive environments and complies with ROHS and REACH standards.
Precision Performance: Manufactured to ABEC1 tolerance class with a controlled radial internal clearance (MC3 group), this bearing provides low noise and vibration for smooth running.
S689 Bearing Typical Application Areas
- Precision Instruments: Optical encoders, measuring devices, and laboratory equipment.
- Small Motors & Spindles: High-speed DC motors, dental handpieces, and small fan motors.
- Office Automation: Printers, scanners, and copiers.
- Medical Devices: Small pumps and handheld surgical tools.
- Robotics: Miniature joints, gearboxes, and servo actuators.
