D/W R133
D/W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
D/W R133
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
0.0001 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
0.0937"
Bore diameter tolerance
-0.00019" to 0.00019"
Outside diameter
0.18748"
Outside diameter tolerance
-0.0007" to -0.00031"
Width
0.06252"
Width tolerance
-0.005" to 0"
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
23 lbf
Radial static load rating
7 lbf
Limiting speed
120 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 R133 Bearing Product Overview & Core Advantages
The D/W R133 is a precision single row deep groove ball bearing designed for high-performance applications requiring exceptional reliability. Manufactured entirely from stainless steel, it offers excellent corrosion resistance. This bearing is engineered to primarily handle radial loads and is characterized by its compact inch dimensions and open design, making it ideal for applications where space is limited and high rotational speeds are required.
D/W R133 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| D/W | Manufacturer prefix (Dunk/Whitney) |
| R133 | Standard bearing series and size designation. |
| N/A (Open) | No seal or shield suffix indicates an open bearing, allowing for custom lubrication schemes and minimizing torque for high-speed operation. |
| N/A (Lubrication) | No lubrication suffix confirms the bearing is supplied unlubricated ("None"), providing flexibility for application-specific lubricant selection. |
D/W R133 Bearing Structural Features & Performance Benefits
- All-Stainless-Steel Construction: The rings, balls, and cage are made from stainless steel, providing superior corrosion resistance and suitability for harsh environments, cleanrooms, and medical equipment.
- High-Speed Capability: The open design and precision-ground components result in low friction, enabling a high limiting speed of 120,000 rpm.
- Precision Tolerance: Manufactured to ABEC 1 (P0) tolerance class and standard CN radial internal clearance, ensuring consistent performance and smooth operation.
- Compact & Lightweight: With a bore diameter of 0.0937" and a weight of only 0.0001 kg, it is an ideal solution for miniaturized and weight-sensitive assemblies.
- Broad Temperature Range: Operates effectively within a temperature range of -30°C to 120°C.
D/W R133 Bearing Typical Application Areas
- Precision Instruments: Optical encoders, gyroscopes, and laboratory equipment.
- Small Motors and Spindles: High-speed dental handpieces, miniature DC motors, and spindle drives.
- Medical Devices: Surgical tools, pumps, and diagnostic equipment requiring corrosion-resistant components.
- Aerospace & Defense: Guidance systems, instrumentation, and avionics.
- Office Automation: Scanners, printers, and high-speed cooling fans.
