W 638/5-2Z
W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
W 638/5-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0018 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
5 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
11 mm
Outside diameter tolerance
-0.008mm to 0
Width
5 mm
Width tolerance
-0.12mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
91 lbf
Radial static load rating
32 lbf
Limiting speed
60 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
No drawings available at the moment, will be launched soon
Price:
$ 2.14
/ each
In Stock
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W 638/5-2Z Bearing Product Overview & Core Advantages
The W 638/5-2Z is a metric single row deep groove ball bearing designed for high performance in compact spaces. Engineered from stainless steel throughout, it offers excellent corrosion resistance. Its core advantage lies in its ability to handle primarily radial loads efficiently, while its shielded design (2Z) retains lubrication and protects against contamination, ensuring long service life and maintenance-free operation. This makes it an ideal precision bearing for applications demanding reliability and cleanliness.
W 638/5-2Z Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| W 638/5 | Basic bearing designation, indicating a deep groove ball bearing series with a 5 mm bore diameter. |
| 2Z | Signifies the bearing is shielded on both sides. This provides effective protection against contaminant ingress while retaining the pre-applied grease. |
W 638/5-2Z Bearing Structural Features & Performance Benefits
- Robust Construction: The single row design, combined with rings, balls, and a cage made entirely of stainless steel, provides high corrosion resistance and durability, suitable for harsh environments.
- Radial Load Capacity: Optimized for handling radial dynamic loads (91 lbf) and radial static loads (32 lbf), making it a reliable choice for various mechanical systems.
- High-Speed Capability: With a limiting speed of 60,000 rpm, this bearing is engineered for high-speed applications, facilitated by its low-friction design and effective grease lubrication.
- Maintenance-Free & Long-Lasting: The 2Z shields seal in the factory-applied grease lubrication, protecting against contamination and moisture. This creates a maintenance-free solution with a long operational lifespan within its specified temperature range (-30°C to 120°C).
- Precision & Consistency: Manufactured to P0 tolerance class and standard CN radial internal clearance, ensuring consistent performance and ease of integration into precision assemblies.
W 638/5-2Z Bearing Typical Application Areas
- Small Electric Motors and Miniature Gearboxes
- Precision Instruments and Optical Devices
- Medical Devices and Laboratory Equipment
- Office Automation Equipment (e.g., Printers, Scanners)
- Radio-Control Models and Small Robotics
