W 61900-2Z/VT378
W Series Stainless Steel Bearings
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Part No.
Part No.
W 61900-2Z/VT378
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0094 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
10 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
22 mm
Outside diameter tolerance
-0.009mm to 0
Width
6 mm
Width tolerance
-0.12mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
526 lbf
Radial static load rating
281 lbf
Limiting speed
36 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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W 61900-2Z/VT378 Bearing Product Overview & Core Advantages
The W 61900-2Z/VT378 is a single row deep groove ball bearing engineered for precision performance in demanding applications. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its key advantage lies in its ability to handle radial loads efficiently while also accommodating moderate axial loads in both directions. The combination of shielded design (2Z) and pre-applied grease lubrication (VT378) ensures long service life and reliable, low-maintenance operation, making it ideal for compact and high-reliability assemblies.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W 61900 | Indicates the bearing series and size. A single row deep groove ball bearing with a 10mm bore, 22mm OD, and 6mm width. |
| 2Z | Signifies that the bearing is shielded on both sides. This provides effective protection against contamination while minimizing friction, contributing to the high limiting speed. |
| VT378 | Denotes the specific high-performance grease used. This grease is formulated for a wide temperature range (-30° to 120 °C), offering stable lubrication and long-term protection. |
W 61900-2Z/VT378 Bearing Structural Features & Performance Benefits
- Robust Stainless Steel Construction: All components, including rings, balls, and the cage, are made from stainless steel, providing superior corrosion resistance and durability in harsh environments.
- Optimized Load Capacity: The deep groove raceway and single-row design are optimized to support significant radial dynamic load ratings (526 lbf) and static loads (281 lbf).
- High-Speed Capability: The low-friction stainless steel cage and effective shielded sealing enable a high limiting speed of 36,000 rpm, making it suitable for high-speed applications.
- Maintenance-Free Operation: The combination of non-contact shields and high-quality pre-lubrication (VT378 grease) creates a sealed-for-life unit, eliminating the need for re-lubrication and reducing total cost of ownership.
- Precision Tolerances: Manufactured to P0 tolerance class and standard CN radial internal clearance, ensuring consistent performance and smooth operation in precision assemblies.
W 61900-2Z/VT378 Bearing Typical Application Areas
This bearing is ideally suited for applications requiring compact size, corrosion resistance, and high-speed operation. Key industries and equipment include:
- Precision Medical Devices (e.g., dental handpieces, small pumps)
- Food Processing & Packaging Machinery (due to stainless steel construction)
- Small Electric Motors and Fans
- Office Automation Equipment (e.g., printers, scanners)
- Instrumentation and Optical Devices
