W 639/1.5 R-2Z
W Series Stainless Steel Flanged Miniature Bearings
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Part No.
Part No.
W 639/1.5 R-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.000305 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
1.5 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
5 mm
Outside diameter tolerance
-0.008mm to 0
Width
2.6 mm
Width tolerance
-0.04mm to 0
Outer Ring Dimensions
Flange outer diameter
6.5 mm
Flange thickness
0.8 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
30 lbf
Radial static load rating
8 lbf
Limiting speed
100 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
Price available upon request.
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W 639/1.5 R-2Z Bearing Product Overview & Core Advantages
The W 639/1.5 R-2Z is a miniature single row deep groove ball bearing designed for applications demanding compact size, reliable performance, and corrosion resistance. Its core advantages stem from its shielded design and stainless steel construction, making it ideal for handling radial loads in high-speed, miniature mechanisms. This bearing offers a pre-lubricated, low-maintenance solution for precision instruments and small electronic devices where space is at a premium and operational reliability is critical.
W 639/1.5 R-2Z Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| W 639/1.5 | Bearing series and size designation (1.5 mm bore). |
| R | Flanged outer ring, providing axial location and simplified mounting. |
| 2Z | Non-contact shields on both sides, offering effective protection against contaminants while minimizing friction. |
W 639/1.5 R-2Z Bearing Structural Features & Performance Benefits
- Compact & Robust Flange Design: The flanged outer ring (R suffix) ensures easy and secure axial positioning within a housing, simplifying assembly and enhancing structural integrity in compact assemblies.
- Effective Contamination Protection: The non-contact shields (2Z) effectively seal the bearing from dust and other particulates, extending service life without significantly increasing friction or limiting the limiting speed (100,000 rpm).
- Corrosion Resistance & Longevity: Manufactured entirely from stainless steel (rings, balls, and cage), this bearing is inherently resistant to corrosion, making it suitable for applications exposed to moisture or aggressive environments.
- Ready-to-Use & Low Maintenance: The bearing comes pre-lubricated with grease, making it ready for immediate installation and requiring no maintenance throughout its service life in many applications.
W 639/1.5 R-2Z Bearing Typical Application Areas
- Small Precision Motors and Stepper Motors
- Medical and Dental Hand Tools
- Optical Encoders and Scanners
- Miniature Gearboxes and Drive Systems
- Small Fans and Blowers
- Radio Control Models and Drones
- Precision Instruments and Laboratory Equipment
