D/W R188
D/W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
D/W R188
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
0.0015 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
0.5"
Outside diameter tolerance
-0.0007" to -0.00031"
Width
0.125"
Width tolerance
-0.005" to 0"
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
139 lbf
Radial static load rating
50 lbf
Limiting speed
67 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 R188 Bearing Product Overview & Core Advantages
The D/W R188 is a precision single row deep groove ball bearing engineered for exceptional performance in demanding applications. Manufactured entirely from stainless steel, it offers superior corrosion resistance and reliable operation. This bearing is designed to primarily handle radial loads and is characterized by its compact design, high limiting speed, and compliance with ROHS and REACH standards. Its open construction and precision P0 tolerance make it an ideal choice for applications requiring high reliability and smooth operation.
D/W R188 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| D/W | Manufacturer/Series designation |
| R188 | Standard bearing size code (0.25" Bore x 0.5" OD x 0.125" Width) |
| Open (Implied) | No seals or shields, allowing for maximum speed and easy re-lubrication. |
| P0 (Implied) | Standard tolerance class, ensuring consistent and reliable performance. |
| CN (Implied) | Normal radial internal clearance, suitable for a wide range of operating conditions. |
D/W R188 Bearing Structural Features & Performance Benefits
- All-Stainless-Steel Construction: The rings, balls, and cage are made from stainless steel, providing excellent corrosion resistance and making the bearing suitable for washdown environments, medical equipment, and food processing.
- High-Speed Capability: The single row deep groove design and open construction, combined with a precision stainless steel cage, enable a high limiting speed of 67,000 rpm.
- Precision Performance: Manufactured to P0 tolerance class with tight bore and outside diameter tolerances, ensuring smooth running, reduced vibration, and high positional accuracy.
- Robust Load Capacity: With a dynamic load rating of 139 lbf and a static load rating of 50 lbf, this bearing offers reliable performance under significant radial loads.
- Versatile Lubrication Options: The open seal type allows for easy application of specialized lubricants to optimize performance for specific temperature ranges or environmental conditions.
D/W R188 Bearing Typical Application Areas
- Precision Instruments and Optical Devices
- Small Electric Motors and Spindles
- Medical and Dental Handpieces
- Office Automation Equipment
- Food and Beverage Processing Machinery
- Robotics and Miniature Actuators
