D/W R4A
D/W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
D/W R4A
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
0.0073 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
0.25"
Bore diameter tolerance
-0.00019" to 0.00019"
Outside diameter
0.75"
Outside diameter tolerance
-0.0007" to -0.00031"
Width
0.21882"
Width tolerance
-0.005" to 0"
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
344 lbf
Radial static load rating
132 lbf
Limiting speed
50 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 R4A Bearing Product Overview & Core Advantages
The D/W R4A is a single row deep groove ball bearing manufactured to inch dimensions, designed for exceptional performance in precision applications. Constructed entirely from stainless steel, it offers superior corrosion resistance and reliability. This bearing is engineered to primarily accommodate radial loads and is characterized by its compact design, high limiting speed, and consistent operation within a wide temperature range. Its open design allows for versatile lubrication options, making it a robust and adaptable choice for demanding environments.
D/W R4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| D/W | Manufacturer's prefix for inch series deep groove ball bearings. |
| R4A | Specific bearing size designation in the inch series. |
| Open (Seal Type) | No seals or shields, enabling high-speed operation and custom lubrication. |
| P0 (Tolerance Class) | Standard tolerance class for general applications. |
| CN (Radial Internal Clearance) | Normal radial internal clearance group. |
D/W R4A Bearing Structural Features & Performance Benefits
- All-Stainless-Steel Construction: The rings, balls, and cage are made from stainless steel, providing excellent resistance to corrosion and allowing for use in harsh or washdown environments.
- High-Speed Capability: The open design and precision-ground components contribute to a high limiting speed of 50,000 rpm, making it suitable for high-speed applications.
- Radial Load Capacity: Engineered to efficiently handle radial loads with a dynamic load rating of 344 lbf and a static load rating of 132 lbf.
- Precision Dimensions: Manufactured to strict inch bearing dimensions and tolerances (P0 class) for reliable and predictable performance in precision assemblies.
- Versatile Lubrication: The open structure allows for the application of specialized lubricants tailored to specific operational needs, such as high-temperature or food-grade requirements.
D/W R4A Bearing Typical Application Areas
This bearing is ideally suited for a wide range of applications requiring precision, corrosion resistance, and high-speed operation, including:
- Medical and Dental Equipment
- Food Processing and Packaging Machinery
- Precision Instruments and Optical Devices
- Small Electric Motors and Fans
- Agricultural Sprayers and Control Systems
