W 619/4
W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
W 619/4
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0015 kg
Tolerance class
P0
Seal type
Open
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
80 X 1000 rpm
Lubrication
None
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 Bearing Product Overview & Core Advantages
The W 619/4 is a single row deep groove ball bearing designed for high-precision applications requiring reliable radial load capacity. Constructed entirely from stainless steel, it offers excellent corrosion resistance and is suitable for a wide operating temperature range. Its compact design, with a 4 mm bore, makes it an ideal choice for applications where space is limited and operational reliability is critical. This bearing is supplied open (unsealed) and without lubrication, providing flexibility for custom application-specific sealing and lubrication solutions.
W 619/4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| W | Stainless Steel bearing series |
| 619 | Deep groove ball bearing series with a very low cross-section |
| /4 | Bore diameter code for a 4 mm bore |
| (No Seal Suffix) | Indicates an open bearing without seals or shields |
| (No Lubrication Suffix) | Indicates the bearing is supplied without lubrication |
W 619/4 Bearing Structural Features & Performance Benefits
- All-Stainless-Steel Construction: The rings, balls, and cage are manufactured from stainless steel, providing superior resistance to corrosion and enabling use in harsh environments and clean applications.
- High-Grade Precision: Manufactured to P0 tolerance class and standard CN radial internal clearance, ensuring consistent performance and smooth operation.
- Optimized for Radial Loads: The deep groove raceway geometry is engineered to efficiently support radial dynamic load ratings up to 121 lbf, making it a robust solution for its size.
- High-Speed Capability: With a limiting speed of 80,000 rpm, this bearing is suitable for high-speed spindles and miniature drives.
- Application Flexibility: The open design allows engineers to apply the specific lubricant and sealing method best suited for the operating conditions, optimizing performance and service life.
W 619/4 Bearing Typical Application Areas
- Precision instruments and measuring devices
- Small electric motors and miniature gearboxes
- Medical and dental handpieces
- Office automation equipment (e.g., printers, scanners)
- Radio-controlled models and drones
- Food processing and packaging machinery (where corrosion resistance is required)
