D/W R3A-2Z
D/W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
D/W R3A-2Z
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
0.0048 kg
Tolerance class
P0
Seal type
Shielded
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
45 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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D/W R3A-2Z Bearing Product Overview & Core Advantages
The D/W R3A-2Z is a precision single row deep groove ball bearing designed for exceptional performance in demanding applications. Engineered with stainless steel construction throughout its rings, balls, and cage, it offers superior corrosion resistance. Its key advantage lies in its ability to handle significant radial loads efficiently while operating at high speeds. The integral shielded (2Z) design on both sides retains factory-applied grease, providing long-term, maintenance-free operation and protecting against contamination. This makes it an ideal, compact solution for applications requiring high reliability, high-speed capability, and consistent performance.
D/W R3A-2Z Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| D/W | Manufacturer / Brand Identifier (Dodge/Wallace) |
| R3 | Bearing series, indicating a specific bore diameter of 3/16" (0.1875") |
| A | Internal design variant, typically referring to specific internal clearances or optimized geometry. |
| 2Z | Bearing is shielded on both sides. This non-contact seal protects the internal components from contaminants while retaining lubricant, enabling maintenance-free operation. |
D/W R3A-2Z Bearing Structural Features & Performance Benefits
- Full Stainless Steel Construction: The use of stainless steel for all critical components (rings, balls, cage) provides excellent corrosion resistance, making it suitable for harsh environments, washdown applications, and medical equipment.
- Optimized Radial Load Capacity: The single row deep groove raceway geometry is engineered to support high radial dynamic load ratings (192 lbf), ensuring durability and long service life.
- High-Speed Performance: The combination of a precision-ground stainless steel cage and optimized internal geometry allows for a high limiting speed of 45,000 rpm, ideal for demanding rotational applications.
- Pre-Lubricated & Sealed for Life: The 2Z shields effectively seal in the factory-applied grease, preventing lubricant loss and particle ingress. This creates a maintenance-free bearing solution with a consistent temperature range of -30°C to 120°C.
- Standard Precision & Clearance: Manufactured to P0 tolerance class and standard CN radial internal clearance, this bearing offers reliable and predictable performance for a wide range of general industrial uses.
D/W R3A-2Z Bearing Typical Application Areas
- Medical and Dental Equipment: Small motors, pumps, and handheld tools requiring corrosion resistance and high-speed operation.
- Food & Beverage Processing: Conveyor systems, mixers, and other machinery where washdown and corrosion are concerns.
- Precision Instruments & Optical Devices: Scanners, encoders, and gauges that demand smooth, low-noise, and reliable rotation.
- Small Electric Motors: High-speed fans, blowers, and miniature drives.
- Office Automation Equipment: Printers, copiers, and scanners.
