W 628/7 R-2Z
W Series Stainless Steel Flanged Miniature Bearings
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Part No.
Part No.
W 628/7 R-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0032 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
7 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
14 mm
Outside diameter tolerance
-0.008mm to 0
Width
5 mm
Width tolerance
-0.12mm to 0
Outer Ring Dimensions
Flange outer diameter
16 mm
Flange thickness
1.1 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
149 lbf
Radial static load rating
58 lbf
Limiting speed
50 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 628/7 R-2Z Bearing Product Overview & Core Advantages
The W 628/7 R-2Z is a metric single row deep groove ball bearing designed for high-performance applications requiring reliable radial load capacity and maintenance-free operation. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its key advantages include shielded protection (2Z) to retain grease and exclude contaminants, and pre-lubrication with grease for immediate use and long service life, making it an ideal compact precision bearing solution.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W 628/7 | Basic bearing designation, indicating a deep groove ball bearing series with a 7 mm bore diameter. |
| R | Designates a flanged outer ring, which facilitates secure axial location and simplified housing design. |
| 2Z | Signifies non-contact shields on both sides. This provides effective protection against contamination while allowing for high-speed operation with minimal friction. |
W 628/7 R-2Z Bearing Structural Features & Performance Benefits
- Robust Single Row Design: The deep groove raceway and stainless steel construction provide reliable radial load handling and high corrosion resistance, suitable for demanding environments.
- Flanged Outer Ring: The integrated flange (16 mm outer diameter) simplifies mounting and positioning, enhancing assembly accuracy and rigidity in the application.
- Shielded & Pre-Lubricated: The 2Z shields protect the internal components from dust and debris. Combined with factory-applied grease, this ensures maintenance-free operation and a long service life within the specified temperature range (-30° to 120 °C).
- High-Speed Capability: The non-contact shields and optimized internal geometry contribute to a high limiting speed of 50,000 rpm, making it suitable for high-speed applications.
W 628/7 R-2Z Bearing Typical Application Areas
This bearing is ideally suited for compact, high-speed devices requiring reliability and corrosion resistance. Key sectors include:
- Small Electric Motors and spindles
- Precision Instruments and optical encoders
- Medical Devices and dental handpieces
- Office Automation Equipment (e.g., printers, scanners)
- Food Processing Machinery (benefiting from its stainless steel construction)
