W 628/5 R-2Z
W Series Stainless Steel Flanged Miniature Bearings
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Basic Information
Main Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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W 628/5 R-2Z Bearing Product Overview & Core Advantages
The W 628/5 R-2Z is a metric miniature deep groove ball bearing engineered for precision applications requiring compact dimensions and reliable performance. Featuring single row construction with stainless steel components and shielded seals, this bearing delivers excellent corrosion resistance and contaminant protection. Its design excels in handling radial loads efficiently while offering smooth operation across a wide temperature range. The combination of a 5 mm bore, lightweight construction (0.0017 kg), and pre-lubrication makes it ideal for space-constrained, high-speed applications demanding long service life and minimal maintenance.
W 628/5 R-2Z Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| W 628/5 | Basic bearing designation indicating a miniature deep groove ball bearing series with 5 mm bore diameter |
| R | Flanged outer ring design providing easy mounting and axial location |
| 2Z | Shielded both sides offering effective contaminant protection while maintaining low friction |
W 628/5 R-2Z Bearing Structural Features & Performance Benefits
Compact Flange Design: The integrated flange (12.6 mm outer diameter, 0.8 mm thickness) enables simplified installation and precise axial positioning without additional components, reducing assembly time and cost.
Superior Material Construction: Manufactured entirely from stainless steel (rings, balls, and cage), this bearing provides excellent corrosion resistance and durability in harsh environments, making it suitable for applications requiring frequent washdown or exposure to chemicals.
Optimized Sealing & Lubrication: The double-shielded (2Z) configuration effectively retains grease while excluding contaminants. Pre-lubricated with high-quality grease, the bearing offers maintenance-free operation throughout its service life under normal conditions.
High-Speed Capability: With a limiting speed of 60,000 rpm, the bearing is engineered for high-speed applications, supported by the precision stainless steel cage that ensures stable ball guidance and reduced friction.
Precision Tolerance: Manufactured to P0 tolerance class with CN radial clearance, the bearing delivers consistent performance and smooth operation in precision mechanisms.
W 628/5 R-2Z Bearing Typical Application Areas
- Small Precision Motors: Ideal for miniature DC motors, stepper motors, and servo motors requiring high-speed operation and compact dimensions
- Medical Devices: Suitable for surgical instruments, dental handpieces, and diagnostic equipment where corrosion resistance and reliability are critical
- Office Automation: Perfect for printers, scanners, and copiers requiring quiet operation and long service life
- Instrumentation & Measurement: Used in precision gauges, optical encoders, and laboratory equipment demanding high rotational accuracy
- Robotics & Automation: Applied in small robotic joints, linear actuators, and positioning systems where space constraints and reliability are paramount
