W 628/8-2Z
W Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
W 628/8-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0038 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
16 mm
Outside diameter tolerance
-0.008mm to 0
Width
5 mm
Width tolerance
-0.12mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
161 lbf
Radial static load rating
67 lbf
Limiting speed
45 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
No drawings available at the moment, will be launched soon
Price:
$ 10.68
/ each
In Stock
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W 628/8-2Z Bearing Product Overview & Core Advantages
The W 628/8-2Z is a metric single row deep groove ball bearing engineered for precision and reliability in compact applications. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its key advantage lies in its ability to handle significant radial loads while being shielded (2Z) and pre-lubricated for long-term, maintenance-free operation. This makes it an ideal solution for applications demanding high rotational accuracy, cleanliness, and durability within a constrained space envelope.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W 628/8 | Basic bearing designation, indicating a single row deep groove ball bearing with an 8 mm bore diameter. |
| -2Z | Signifies the bearing is equipped with non-contact shields on both sides. This provides effective protection against contaminant ingress while minimizing friction, contributing to the high limiting speed. |
W 628/8-2Z Bearing Structural Features & Performance Benefits
- Robust Stainless Steel Construction: All components, including rings, balls, and the integral cage, are made of stainless steel, ensuring superior corrosion resistance and suitability for harsh environments.
- Optimized Deep Groove Raceway: The geometry of the raceways is designed for efficient radial load carrying capacity, making it a versatile choice for a wide range of applications.
- Shielded & Pre-Lubricated for Longevity: The 2Z shields retain the factory-applied grease and protect against contaminants. This combination delivers a maintenance-free solution with a consistent temperature range of -30°C to 120°C.
- Precision and High-Speed Capability: Manufactured to P0 tolerance class with standard CN radial internal clearance, it ensures smooth and quiet operation, supporting a limiting speed of 45,000 rpm.
W 628/8-2Z Bearing Typical Application Areas
This bearing is ideally suited for compact, high-speed devices requiring reliable performance. Common applications include:
- Small Electric Motors and Gearboxes
- Precision Instruments and Medical Devices
- Office Automation Equipment (e.g., printers, scanners)
- Food Processing and Packaging Machinery
- Robotics and Small Drives
