W 637/8 R-2Z
W Series Stainless Steel Flanged Miniature Bearings
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Part No.
Part No.
W 637/8 R-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0012 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
12 mm
Outside diameter tolerance
-0.008mm to 0
Width
3.5 mm
Width tolerance
-0.12mm to 0
Outer Ring Dimensions
Flange outer diameter
13.6 mm
Flange thickness
0.8 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
70 lbf
Radial static load rating
31 lbf
Limiting speed
53 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 637/8 R-2Z Bearing Product Overview & Core Advantages
The W 637/8 R-2Z is a metric single row deep groove ball bearing designed for high-performance applications requiring compact design and reliable operation. Engineered with stainless steel components, it offers excellent corrosion resistance. Its key advantage lies in its ability to efficiently handle radial loads while its shielded design provides protection against contamination. This bearing is characterized by its compact cross-section and is pre-lubricated with grease, making it a ready-to-install, low-maintenance solution for a wide range of precision equipment.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W | Stainless Steel Bearing |
| 637/8 | Bearing series and size designation (8 mm bore) |
| R | Flanged Outer Ring |
| 2Z | Shielded on both sides for contaminant protection |
W 637/8 R-2Z Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With a width of only 3.5 mm and a weight of 0.0012 kg, this bearing is ideal for applications with severe space and weight constraints.
- Flanged Outer Ring: The integrated flange (13.6 mm outer diameter) simplifies mounting and positioning within a housing, reducing assembly time and cost.
- Shielded Protection: The 2Z shields effectively retain lubricant and exclude larger particulate contaminants, enhancing bearing service life.
- Stainless Steel Construction: All critical components (rings, balls, cage) are made from stainless steel, providing superior corrosion resistance and suitability for harsh environments.
- Pre-Lubricated & Ready-to-Use: Factory-filled grease and standard CN radial internal clearance ensure immediate, reliable performance upon installation.
W 637/8 R-2Z Bearing Typical Application Areas
This bearing is commonly specified in:
- Small Precision Motors and Miniature Gearboxes
- Medical Devices and Dental Handpieces
- Office Automation Equipment (e.g., printers, scanners)
- Instrumentation and Control Systems
- Food Processing Machinery (benefiting from its stainless steel construction)
