W 628/4-2Z
W Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
W 628/4-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.016 kg
Tolerance class
ABEC 1 | ISO 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
45 X 1000 rpm
Lubrication
None
Radial internal clearance
CN
Materials
Ring material
Stainless Steel
Ball material
Stainless Steel
Cage material
Chrome Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 2.2
/ each
In Stock
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W 628/4-2Z Bearing Product Overview & Core Advantages
The W 628/4-2Z is a single row deep groove ball bearing designed for exceptional performance in compact applications. Constructed entirely from stainless steel, it offers superior corrosion resistance. Its key advantage lies in its ability to handle significant radial loads while operating at high speeds. The inclusion of shielded seals (2Z) protects the bearing's interior from contaminants, making it a robust and reliable choice for applications demanding high precision and long service life without maintenance.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W 628/4 | Basic bearing designation, indicating a metric, single row deep groove ball bearing with an 8 mm bore. |
| -2Z | Bearing is equipped with shielded seals on both sides. This provides effective protection against solid contaminants while minimizing friction. |
W 628/4-2Z Bearing Structural Features & Performance Benefits
- Corrosion Resistance: Manufactured with stainless steel rings, balls, and a chrome steel cage, this bearing is ideal for environments exposed to moisture or corrosive agents.
- High-Speed Capability: The precision ABEC 1 | ISO P0 tolerance and optimized internal geometry enable a high limiting speed of 45,000 rpm, making it suitable for demanding rotational applications.
- Robust Load Capacity: Engineered to support a substantial radial dynamic load rating of 555 lbf, ensuring reliable performance under stress.
- Maintenance-Free Operation: The non-contact shielded seals (2Z) retain the factory-predefined internal clearance and protect the bearing, offering a long, maintenance-free service life. The bearing is supplied without lubrication (None), allowing for application-specific lubricant selection.
W 628/4-2Z Bearing Typical Application Areas
This bearing is widely used in applications requiring compact size, high speed, and corrosion resistance. Key sectors include:
- Precision Electric Motors and Small Gearboxes
- Medical and Dental Equipment
- Food Processing and Packaging Machinery
- Office Automation Equipment (e.g., printers, scanners)
- Instrumentation and Precision Guiding Mechanisms
