W 61904-2RS1/VT378
W Series Stainless Steel Bearings
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Part No.
Part No.
W 61904-2RS1/VT378
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.033 kg
Tolerance class
ABEC 1 | ISO P0
Seal type
Sealed
For load direction
Radial
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
37 mm
Outside diameter tolerance
-0.011mm to 0
Width
9 mm
Width tolerance
-0.12mm to 0
Performance
Temperature range
-30°to 120 °C
Radial dynamic load rating
1243 lbf
Radial static load rating
821 lbf
Limiting speed
26 X 1000 rpm
Lubrication
None
Radial internal clearance
CN
Materials
Ring material
Stainless Steel
Ball material
Stainless Steel
Cage material
Chrome Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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W 61904-2RS1/VT378 Bearing Product Overview & Core Advantages
The W 61904-2RS1/VT378 is a single row deep groove ball bearing designed for high reliability in demanding applications. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its key advantage lies in its sealed design (2RS1) and pre-lubrication (VT378), making it a maintenance-free solution that effectively protects against contaminants. This bearing is engineered to primarily handle radial loads and is characterized by its compact cross-section, low friction, and smooth operation, making it ideal for applications requiring precision and long service life.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W | Stainless Steel Bearing |
| 61904 | Bearing series and size designation (9mm width, 20mm bore, 37mm OD) |
| 2RS1 | Contact seals on both sides, providing superior protection against dust and moisture. |
| VT378 | A high-quality, food-grade grease lubricant, suitable for the specified temperature range and offering long-term lubrication. |
W 61904-2RS1/VT378 Bearing Structural Features & Performance Benefits
- Corrosion Resistance: The use of stainless steel for the rings and balls ensures reliable performance in humid or corrosive environments, enhancing bearing service life.
- Sealed and Lubricated for Life: The integral contact seals (2RS1) effectively retain the VT378 grease and exclude contaminants, resulting in a maintenance-free bearing assembly ideal for sealed-for-life applications.
- Precision and Smooth Operation: Manufactured to ABEC 1 (ISO P0) tolerance class with CN radial internal clearance, this bearing provides consistent, low-vibration, and low-noise operation.
- Robust Load Capacity: With a dynamic load rating of 1243 lbf and a static load rating of 821 lbf, it is capable of handling significant radial loads for its compact size.
W 61904-2RS1/VT378 Bearing Typical Application Areas
This bearing is well-suited for a wide range of applications where corrosion resistance, cleanliness, and reliability are critical. Key sectors include:
- Food and Beverage Processing Equipment (conveyors, mixers)
- Medical and Laboratory Devices
- Chemical Handling Equipment
- Agricultural Machinery
- Low-torque Precision Instruments and small electric motors.
