D/W R3A
D/W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
D/W R3A
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
0.0044 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
0.18748"
Bore diameter tolerance
-0.00019" to 0.00019"
Outside diameter
0.625"
Outside diameter tolerance
-0.0007" to -0.00031"
Width
0.19598"
Width tolerance
-0.005" to 0"
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
192 lbf
Radial static load rating
71 lbf
Limiting speed
56 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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D/W R3A Bearing Product Overview & Core Advantages
The D/W R3A is a precision miniature ball bearing designed for applications demanding high reliability in compact spaces. As a single row deep groove ball bearing in an open configuration, it excels at handling radial loads and is manufactured to standard P0 tolerance class. Its construction from stainless steel for all critical components provides excellent corrosion resistance, making it suitable for a wide operating temperature range from -30° to 120 °C. This bearing is a robust, cost-effective solution for high-speed, low-torque applications.
D/W R3A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| D/W | Manufacturer Series Designation |
| R3A | Specific bearing size code, indicating a bore diameter of 0.18748" (approx. 3/16"), an outside diameter of 0.625", and a width of 0.19598". |
| (No Suffix) | The absence of suffixes indicates an Open seal type, standard radial internal clearance (CN), and no pre-lubrication (Lubrication: None). |
D/W R3A Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With a bore diameter of just 0.18748" and a weight of only 0.0044 kg, this bearing is ideal for space-constrained miniature assemblies and helps reduce overall system inertia.
- Corrosion Resistance: Manufactured entirely from stainless steel (rings, balls, and cage), it offers superior protection against rust and corrosion, ensuring long-term performance in challenging environments.
- High-Speed Capability: The single row deep groove geometry and stainless steel cage contribute to stable operation at high rotational speeds, with a limiting speed of 56,000 rpm.
- Precision Performance: Built to P0 tolerance class with tight dimensional tolerances, this bearing provides reliable running accuracy for smooth and quiet operation.
D/W R3A Bearing Typical Application Areas
This versatile miniature bearing is commonly specified in:
- Precision Instruments: Optical encoders, medical devices, and laboratory equipment.
- Small Motors and Gearboxes: Stepper motors, miniature DC motors, and precision gearheads.
- Office Automation Equipment: Printers, scanners, and copiers.
- Radio Control Models: Drones, RC cars, and aircraft.
- Any application requiring a reliable, small bore diameter bearing with corrosion-resistant properties.
