D/W R2-5-2Z
D/W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
D/W R2-5-2Z
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
0.000719 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
0.125"
Bore diameter tolerance
-0.00019" to 0.00019"
Outside diameter
0.31252"
Outside diameter tolerance
-0.0007" to -0.00031"
Width
0.14059"
Width tolerance
-0.005" to 0"
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
72 lbf
Radial static load rating
20 lbf
Limiting speed
75 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 R2-5-2Z Bearing Product Overview & Core Advantages
The D/W R2-5-2Z is a single row deep groove ball bearing designed for precision applications requiring reliable performance. Manufactured entirely from stainless steel, it offers excellent corrosion resistance. Its key advantage lies in its ability to efficiently handle radial loads while its shielded (2Z) design and factory-applied grease lubrication ensure long-term, maintenance-free operation in demanding environments. This compact bearing is ideal for applications where space is limited and high reliability is critical.
D/W R2-5-2Z Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| R2-5 | Indicates the specific bearing size series with a 1/8" bore and 5/16" outside diameter. |
| 2Z | Signifies that the bearing is equipped with non-contact shields on both sides. This provides effective protection against contaminant ingress while minimizing friction, contributing to the high limiting speed. |
D/W R2-5-2Z Bearing Structural Features & Performance Benefits
- Robust Construction: The single row deep groove raceway and all-stainless-steel construction (rings, balls, cage) provide high corrosion resistance and consistent performance across the specified temperature range of -30° to 120 °C.
- Radial Load Capacity: Engineered to handle significant radial dynamic loads (72 lbf) and radial static loads (20 lbf), making it suitable for a variety of mechanical systems.
- High-Speed Operation: The combination of low-friction 2Z shields, a precision stainless steel cage, and optimized grease enables a high limiting speed of 75,000 rpm.
- Maintenance-Free & Long Life: The bearing is pre-lubricated with grease and sealed for life by the shields, eliminating the need for re-lubrication and ensuring reliable operation in sealed assemblies.
- Precision Fit: Manufactured to P0 tolerance class and standard CN radial internal clearance, ensuring predictable performance and ease of installation in precision applications.
D/W R2-5-2Z Bearing Typical Application Areas
This versatile miniature bearing is commonly used in:
- Precision Instruments and optical devices
- Small electric motors and spindles
- Medical and dental handpieces
- Office automation equipment and small fans
- Robotics and miniature gearboxes
