W 628/9 R-2Z
W Series Stainless Steel Flanged Miniature Bearings
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Part No.
Part No.
W 628/9 R-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0046 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
9 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
17 mm
Outside diameter tolerance
-0.008mm to 0
Width
5 mm
Width tolerance
-0.12mm to 0
Outer Ring Dimensions
Flange outer diameter
19 mm
Flange thickness
1.1 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
171 lbf
Radial static load rating
75 lbf
Limiting speed
43 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 628/9 R-2Z Bearing Product Overview & Core Advantages
The W 628/9 R-2Z is a single row deep groove ball bearing designed for high precision and reliable operation. Engineered with stainless steel rings, balls, and cage, it offers excellent corrosion resistance. Its key advantage is the combination of a shielded design (2Z) and pre-lubrication with grease, making it a maintenance-free solution ideal for applications demanding cleanliness and long service life. This bearing is optimized to handle primarily radial loads efficiently.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W 628/9 | Bearing series and size designation (9mm bore) |
| R | Bearing with flanged outer ring |
| 2Z | Bearing with shields on both sides for contaminant protection |
W 628/9 R-2Z Bearing Structural Features & Performance Benefits
- Flanged Design: The flanged outer ring (R suffix) simplifies bearing mounting and alignment, providing secure axial location within the housing.
- Shielded & Lubricated: The 2Z shields effectively retain grease and exclude larger contaminants, supporting the maintenance-free characteristic. The pre-applied grease ensures immediate and smooth operation.
- Corrosion Resistance: Constructed entirely from stainless steel, this bearing is suitable for applications exposed to moisture, chemicals, or requiring washdown.
- Precision & Load Capacity: Manufactured to P0 tolerance class with CN radial internal clearance, it provides reliable performance under its specified radial dynamic load rating of 171 lbf.
W 628/9 R-2Z Bearing Typical Application Areas
This bearing is commonly used in:
- Small electric motors and gearboxes
- Medical and dental equipment
- Food processing machinery
- Precision instruments and optical devices
- Conveyor system rollers
- Ventilation fans and pumps
