W 619/4-2Z
W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
W 619/4-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0016 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
4 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
11 mm
Outside diameter tolerance
-0.008mm to 0
Width
4 mm
Width tolerance
-0.12mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
121 lbf
Radial static load rating
40 lbf
Limiting speed
63 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 619/4-2Z Bearing Product Overview & Core Advantages
The W 619/4-2Z is a single row deep groove ball bearing engineered for precision and reliability in compact applications. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its primary advantage lies in its ability to efficiently support radial loads, while its shielded (2Z) design on both sides retains factory-applied grease and protects against contaminant ingress, ensuring long-term performance with minimal maintenance. This makes it an ideal choice for applications demanding high rotational accuracy, compact design, and dependable operation.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W 619/4 | Indicates the bearing series and size. A single row deep groove ball bearing with a 4 mm bore diameter. |
| 2Z | Signifies that the bearing is shielded on both sides. This non-contact seal protects the internal components from contamination and helps retain lubrication. |
W 619/4-2Z Bearing Structural Features & Performance Benefits
- Compact and Lightweight Design: With dimensions of 4x11x4 mm and a weight of only 0.0016 kg, this bearing is perfect for space-constrained and weight-sensitive applications.
- Robust Load Capacity: Features a radial dynamic load rating of 121 lbf and a radial static load rating of 40 lbf, providing reliable performance under load.
- High-Speed Capability: The optimized design and stainless steel cage contribute to a high limiting speed of 63,000 rpm, suitable for demanding high-speed operations.
- Maintenance-Free Operation: The combination of non-contact shields (2Z) and factory-preloaded grease lubrication creates a sealed-for-life unit, reducing the need for re-lubrication.
- Corrosion Resistance: All components, including rings, balls, and cage, are made from stainless steel, making it suitable for use in harsh or washdown environments.
W 619/4-2Z Bearing Typical Application Areas
This bearing is widely used in applications requiring small bearing dimensions, high speed, and corrosion resistance. Typical fields include:
- Small Precision Electric Motors
- Medical and Dental Instruments
- Optical Encoders and Sensors
- Office Automation Equipment (e.g., small printers, scanners)
- Radio Control Models and Drones
