D/W R156
D/W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
D/W R156
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
0.0004 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
0.18748"
Bore diameter tolerance
-0.00019" to 0.00019"
Outside diameter
0.31252"
Outside diameter tolerance
-0.0007" to -0.00031"
Width
0.10941"
Width tolerance
-0.005" to 0"
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
46 lbf
Radial static load rating
17 lbf
Limiting speed
90 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 R156 Bearing Product Overview & Core Advantages
The D/W R156 is a precision single row deep groove ball bearing designed for high-performance applications requiring exceptional reliability. Manufactured entirely from stainless steel, it offers superior corrosion resistance. This bearing is engineered to handle primarily radial loads and is characterized by its compact, inch-series dimensions, making it ideal for space-constrained assemblies demanding high rotational accuracy and long service life.
D/W R156 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| D/W | Manufacturer's series prefix for a specific line of miniature and instrument ball bearings. |
| R156 | The specific bearing size designation within the inch-series portfolio. |
| Open (Seal Type) | No seals or shields, allowing for higher limiting speeds and easy re-lubrication, but requiring a clean operating environment. |
| None (Lubrication) | Supplied without grease, providing flexibility for the user to apply a specialized lubricant suited to the specific application. |
D/W R156 Bearing Structural Features & Performance Benefits
- All-Stainless-Steel Construction: The rings, balls, and stainless steel cage provide excellent resistance to corrosion and are suitable for a wide temperature range from -30°C to 120°C, making them ideal for harsh environments, medical, and food-grade applications.
- High-Speed Capability: The open design and precision construction contribute to a high limiting speed of 90,000 rpm, enabling use in demanding high-velocity scenarios.
- Precision Tolerance (P0): Manufactured to ABEC 1 precision (P0 class), ensuring consistent running accuracy and smooth operation, which is critical for sensitive instrumentation.
- Standard Radial Clearance (CN): Features a normal (CN) radial internal clearance, providing a versatile balance for a wide range of operating conditions and fits.
D/W R156 Bearing Typical Application Areas
This bearing is commonly specified in:
- Precision Instruments and optical devices
- Small high-speed motors and spindles
- Medical and dental handpieces
- Robotics and miniature automation equipment
- Aerospace and defense instrumentation
