71806 CD/P4DGB
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71806 CD/P4DGB
Basic Information
System of measurement
Metric
Weight
0.052 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
30 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
42 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
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1609 lbf
Radial static load rating
1688 lbf
Limiting speed
83 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
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
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71806 CD/P4DGB Bearing Product Overview & Core Advantages
The 71806 CD/P4DGB is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a universally matchable (SU) bearing supplied in a preloaded duplex set, it delivers superior rigidity and can accommodate combined radial and axial loads simultaneously. Its P4 tolerance class and light preload (Class B) make it an ideal choice for high-precision spindles and other critical machinery requiring minimal runout and smooth operation.
71806 CD/P4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Interpretation | Technical Significance |
|---|---|---|
| 71806 | Basic Bearing Series & Size | Denotes a super-precision, light series angular contact bearing with a 30mm bore. |
| CD | Duplex Arrangement & Preload | Indicates a universally matchable (SU) duplex pair with a light preload (Class B), optimized for high rigidity and precise shaft positioning. |
| P4 | Tolerance Class | Signifies high-precision manufacturing tolerances superior to ABEC-7, ensuring minimal runout and vibration. |
| DGB | Contact Angle & Grease | Specifies a 15° contact angle and indicates the bearing is lubricated from the factory for immediate use. |
71806 CD/P4DGB Bearing Structural Features & Performance Benefits
- High Rigidity & Axial Load Capacity: The duplex (back-to-back) arrangement of two bearings creates a rigid support system that effectively handles combined radial and axial loads from both directions, making it suitable for applications with complex loading conditions.
- Superior High-Speed Performance: The phenolic resin cage is lightweight and possesses excellent sliding properties, contributing to lower friction, reduced heat generation, and a high limiting speed of 83,000 rpm. The optimized 15° contact angle further enhances high-speed capability.
- Exceptional Precision & Smooth Operation: Manufactured to a P4 tolerance class with a light preload, this bearing ensures extremely low vibration and high running accuracy, which is critical for maintaining the precision of machine tools and other high-end equipment.
- Ready-to-Install Convenience: The bearing set is supplied pre-lubricated and universally matchable (SU), simplifying installation and ensuring optimal performance from the first rotation without the need for complex adjustments.
71806 CD/P4DGB Bearing Typical Application Areas
The 71806 CD/P4DGB is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Instrumentation: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Frequency Motors & Spindles: Electric spindle units for PCB drilling and dental handpieces.
- Robotics: High-accuracy joints and actuators.
