W 627
W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
W 627
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.012 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
7 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
22 mm
Outside diameter tolerance
-0.009mm to 0
Width
7 mm
Width tolerance
-0.12mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
447 lbf
Radial static load rating
175 lbf
Limiting speed
48 X 1000 rpm
Lubrication
None
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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Product Overview and Core Advantages
The W 627 is a metric single row deep groove ball bearing designed for exceptional performance in radial load applications. Constructed entirely from stainless steel (rings, balls, and cage), it offers superior corrosion resistance. This open-type bearing is characterized by its compact design, high limiting speed of 48,000 rpm, and compliance with ROHS and REACH standards, making it ideal for applications demanding high reliability and precision in challenging environments.
W 627 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Interpretation | Technical Significance |
|---|---|---|
| W | Stainless Steel Deep Groove Ball Bearing Series | Indicates a standard design constructed entirely from stainless steel for corrosion resistance. |
| 627 | Dimension Series Code | Defines the bearing dimensions: 7 mm bore, 22 mm outside diameter, 7 mm width. |
| (No Suffix) | Open, Standard Tolerance (P0), Standard Clearance (CN) | No seals or shields; standard precision and internal clearance for general applications. |
Structural Features and Performance Benefits
- All-Stainless-Steel Construction: The use of stainless steel for all critical components (rings, balls, and cage) provides excellent resistance to rust and corrosion, extending bearing service life in humid or chemically aggressive environments.
- Deep Groove Raceway: The geometry of the deep groove raceways enables the bearing to handle not only significant radial loads but also moderate axial loads in both directions, offering versatile load-carrying capacity.
- High-Speed Capability: The integrated stainless steel cage and optimized internal design contribute to a high limiting speed, making it suitable for applications requiring rapid rotation.
- Precision and Stability: Manufactured to tolerance class P0 with a standard radial internal clearance (CN), this bearing ensures consistent performance, low noise, and smooth operation.
W 627 Bearing Typical Application Areas
This bearing is ideally suited for a wide range of applications where corrosion resistance, high speed, and reliable radial load support are critical. Key sectors include:
- Food and Beverage Processing Equipment
- Medical and Laboratory Devices
- Chemical Handling Apparatus
- Precision Instruments and Optical Devices
- Small Electric Motors and Gearboxes
