628/4-2Z
6000, 6200 & 6300 Series Metric Standard Ball Bearings
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Basic Information
Main Dimensions
Performance
Materials
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628/4-2Z Bearing Product Overview & Core Advantages
The 628/4-2Z is a metric single row deep groove ball bearing engineered for precision applications requiring compact design and reliable performance. Featuring shielded construction and pre-lubrication, this bearing delivers excellent radial load capacity and smooth operation. Its P6 tolerance class ensures high running accuracy, making it ideal for applications demanding precise rotational control and long service life in constrained spaces.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 628 | Standard deep groove ball bearing series |
| 4 | Bore diameter: 4 mm |
| 2Z | Shielded both sides for contaminant protection while maintaining low friction |
628/4-2Z Bearing Structural Features & Performance Benefits
Optimized Radial Load Capacity: The single row deep groove raceway geometry efficiently handles radial loads with a dynamic rating of 95 lbf and static rating of 26 lbf.
Precision Engineering: Manufactured to P6 tolerance class with tight dimensional controls (bore/OD tolerance: -0.007mm to 0) for consistent high-precision performance.
Enhanced Contamination Protection: Both sides feature shielded construction that retains factory-applied grease while excluding contaminants, extending service life.
High-Speed Capability: The stainless steel cage and optimized grease lubrication enable reliable operation up to 70,000 rpm limiting speed.
Wide Temperature Range: Suitable for operation from -30°C to 120°C, accommodating various industrial environments.
628/4-2Z Bearing Typical Application Areas
- Small precision motors and miniature drives
- Medical devices and dental handpieces
- Office automation equipment including printers and scanners
- Instrumentation and measuring devices
- Robotics and miniature automation systems
- Consumer electronics requiring compact, reliable rotation
