D/W R2A
D/W Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
D/W R2A
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
0.0031 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
0.125"
Bore diameter tolerance
-0.00019" to 0.00019"
Outside diameter
0.5"
Outside diameter tolerance
-0.0007" to -0.00031"
Width
0.17189"
Width tolerance
-0.005" to 0"
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
82 lbf
Radial static load rating
26 lbf
Limiting speed
80 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 R2A Bearing Product Overview & Core Advantages
The R2A is a precision miniature ball bearing designed for applications demanding high reliability and dimensional stability. As a single row deep groove ball bearing in an open configuration, it excels at handling radial loads while also accommodating moderate axial loads in both directions. Its compact inch-series design and construction from stainless steel throughout make it an ideal choice for corrosive environments, offering excellent performance within a wide temperature range.
D/W R2A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| R2 | Standard series designation for this inch-size miniature bearing. |
| A | Indicates a 15° contact angle, optimizing it for combined radial and axial loads. |
| (No Seal Suffix) | Open (non-contact) seal type, minimizing friction for higher speeds. |
| (No Lubrication Suffix) | Lubrication: None, allowing for application-specific lubrication or dry running. |
D/W R2A Bearing Structural Features & Performance Benefits
- High Corrosion Resistance: Manufactured entirely from stainless steel (rings, balls, and cage), this bearing is inherently resistant to rust and corrosion, ensuring long-term performance in harsh or wash-down environments.
- Precision & Low Friction: The open design and deep groove raceway minimize friction and torque, contributing to smooth operation and supporting the high limiting speed of 80,000 rpm.
- Robust Load Capacity: Despite its miniature bearing dimensions (1/8" bore), it offers a substantial dynamic load rating of 82 lbf, providing reliable support for radial loads.
- Standard Precision & Clearance: Built to ABEC 1 (P0) tolerance class with standard radial internal clearance (CN), ensuring consistent and predictable performance for a wide range of general-purpose applications.
D/W R2A 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, servo motors, and miniature drives.
- Office Automation: Printers, scanners, and copiers.
- Radio Control Models: Drones, RC cars, and aircraft.
- Any application requiring a reliable, corrosion-resistant bearing with a 1/8" bore.
