W 628-2Z
W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
W 628-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.017 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
8 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
24 mm
Outside diameter tolerance
-0.009mm to 0
Width
8 mm
Width tolerance
-0.12mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
555 lbf
Radial static load rating
252 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Grease
Radial internal clearance
CN
Materials
Ring material
Stainless Steel
Ball material
Stainless Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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W 628-2Z Bearing Product Overview & Core Advantages
The W 628-2Z is a single row deep groove ball bearing engineered for exceptional performance in compact spaces. Constructed entirely from stainless steel, it offers superior corrosion resistance. Its key advantage lies in its ability to handle significant radial loads, making it a reliable and durable choice for applications demanding high precision and long-term reliability. The integrated shielded design (2Z) and factory-applied grease lubrication ensure extended service life with minimal maintenance.
W 628-2Z Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| W 628 | Basic bearing designation, indicating a metric, single row deep groove ball bearing with an 8 mm bore. |
| -2Z | Specifies shielded on both sides. These non-contact shields protect the bearing interior from contamination while minimizing friction, contributing to the high limiting speed. |
W 628-2Z Bearing Structural Features & Performance Benefits
- Robust Construction: The single-row design with deep raceways provides high radial load capacity and stable operation.
- Corrosion Resistance: All components, including rings, balls, and the stainless steel cage, are made of stainless steel, ensuring excellent performance in harsh or washdown environments.
- High-Speed Capability: The combination of low-friction shields, a stainless steel cage, and optimized grease lubrication allows for a high limiting speed of 36,000 rpm.
- Maintenance-Free Operation: The bearing is pre-lubricated and sealed for life with shields (2Z), offering long-term, reliable performance without the need for re-lubrication.
- Precision Tolerance: Manufactured to P0 tolerance class and standard CN radial internal clearance, ensuring consistent and precise performance for a wide range of applications.
W 628-2Z Bearing Typical Application Areas
- Medical and Dental Equipment
- Food Processing and Packaging Machinery
- Precision Instruments and Optical Devices
- Small Electric Motors and Gearboxes
- Office Automation Equipment
