D/W R4 A-2Z
D/W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
D/W R4 A-2Z
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
4.46 g
Tolerance class
ABEC 1 | ISO P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
0.25"
Bore diameter tolerance
-0.0003" to 0"
Outside diameter
0.625"
Outside diameter tolerance
-0.0003" to 0"
Width
0.196"
Width tolerance
-0.005" to 0"
Performance
Temperature range
-30°to 120 °C
Radial dynamic load rating
283 lbf
Radial static load rating
112 lbf
Limiting speed
38 X 1000 rpm
Lubrication
None
Radial internal clearance
CN
Materials
Ring material
Stainless Steel
Ball material
Stainless Steel
Cage material
Chrome Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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D/W R4 A-2Z Bearing Product Overview & Core Advantages
The D/W R4 A-2Z is a precision single row deep groove ball bearing designed for demanding applications requiring high reliability and consistent performance. Engineered with stainless steel construction and shielded protection, this bearing excels in environments where corrosion resistance and contamination protection are critical. Its fundamental design enables efficient handling of radial loads, making it a compact and robust solution for various industrial mechanisms. Manufactured to ABEC 1 precision class, it offers excellent value for applications requiring dependable operation without the need for high-speed capabilities.
D/W R4 A-2Z Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| D/W | Manufacturer/Series designation |
| R4 | Bearing size series designation |
| A-2Z | Shielded on both sides (2Z), providing effective protection against contaminant ingress while maintaining low friction operation |
D/W R4 A-2Z Bearing Structural Features & Performance Benefits
- Corrosion-Resistant Construction: Both rings and balls manufactured from stainless steel provide excellent resistance to rust and corrosion, ensuring long service life in harsh environments.
- Effective Contamination Protection: The double-shielded (2Z) design effectively excludes contaminants while minimizing friction torque, making it suitable for applications where re-lubrication is not feasible.
- Precision Performance: Manufactured to ABEC 1 (ISO P0) tolerance class with standard CN radial internal clearance, delivering consistent running accuracy and smooth operation.
- Optimized Cage Design: The chrome steel cage provides durable ball guidance and contributes to stable operation across the specified temperature range of -30°C to 120°C.
- Maintenance-Free Operation: Pre-lubricated design eliminates the need for additional lubrication during service, reducing maintenance requirements and total cost of ownership.
D/W R4 A-2Z Bearing Typical Application Areas
- Medical Equipment: Small motors, pumps, and precision instruments requiring corrosion resistance and clean operation
- Food Processing Machinery: Conveyor systems and processing equipment where stainless steel construction is mandatory
- Office Automation: Printers, scanners, and copiers requiring reliable, maintenance-free bearing performance
- Small Electric Motors: Low to moderate speed applications in appliances and industrial drives
- Instrumentation & Control Systems: Precision mechanisms where consistent torque and smooth operation are essential
