71807 CD/P4DT
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71807 CD/P4DT
Basic Information
System of measurement
Metric
Weight
0.056 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.004mm to 0
Width
14 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1712 lbf
Radial static load rating
1946 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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71807 CD/P4DT Bearing Product Overview & Core Advantages
The 71807 CD/P4DT is a precision angular contact ball bearing supplied as a duplex tandem (DT) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing is designed to primarily accommodate high axial loads in one direction. Its P4 tolerance class ensures ultra-precise running, making it ideal for high-speed spindles and other high-precision machinery. The phenolic cage and optimized internal geometry contribute to superior high-speed performance and stability.
71807 CD/P4DT Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| C | Specifies a 15° contact angle, optimized for high axial load capacity. |
| D | Indicates the bearing is part of a duplex (matched pair) set. |
| P4 | Denotes a high-precision tolerance class for applications requiring minimal runout and vibration. |
| DT | Signifies the Duplex Tandem arrangement, where two bearings are mounted together to increase axial load capacity in the same direction. |
71807 CD/P4DT Bearing Structural Features & Performance Benefits
- High Rigidity & Axial Load Capacity: The duplex tandem (DT) arrangement combines two bearings to create a highly rigid assembly capable of supporting very high axial loads. This configuration is essential for applications where shaft displacement must be minimized.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling stable operation at the high limiting speed of 56,000 rpm. The 15° contact angle further optimizes the bearing for high-speed applications.
- Precision Engineering: Manufactured to P4 tolerance class, this bearing guarantees extremely tight dimensional and running accuracy, resulting in smooth operation, reduced vibration, and enhanced machine tool finish quality.
- Pre-lubricated: The bearing comes lubricated from the factory, ensuring immediate readiness for installation and initial operation.
71807 CD/P4DT Bearing Typical Application Areas
This precision duplex tandem bearing set is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines and high-frequency motor spindles.
- High-Speed Automation: Robotics and CNC machining centers requiring high rigidity and accuracy.
