71814 ACD/P4DGC
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71814 ACD/P4DGC
Basic Information
System of measurement
Metric
Weight
0.27 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
70 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
31
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4770 lbf
Radial static load rating
6750 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Moderate / Class C
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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71814 ACD/P4DGC Bearing Product Overview & Core Advantages
The 71814 ACD/P4DGC is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. As part of a universally matchable (SU) set, it excels at handling combined loads—simultaneously supporting significant radial and axial forces. Its P4 tolerance class ensures ultra-precise running accuracy, while the phenolic cage and optimized 25° contact angle contribute to superior high-speed performance and operational stability, making it ideal for high-reliability machinery.
71814 ACD/P4DGC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| ACD | 25° contact angle, universal matchable design | Enables flexible mounting in back-to-back (DB), face-to-face (DF), or tandem (DT) arrangements to optimize load distribution and system rigidity. |
| P4 | High precision tolerance class | Guarantees extremely tight dimensional and running accuracy for applications requiring minimal vibration and high rotational precision. |
| DGC | Moderate preload (Class C) | Provides increased bearing stiffness and reduces deflection under load, enhancing positional accuracy without excessive friction or heat generation. |
71814 ACD/P4DGC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and universal matchable pairing create a highly rigid bearing system capable of withstanding combined radial and axial loads from both directions. The moderate preload (C) further increases system stiffness, critical for minimizing shaft runout.
- Optimized High-Speed Performance: The lightweight phenolic resin cage ensures excellent dimensional stability and low friction at high rotational speeds, contributing to the bearing's limiting speed of 28,000 rpm. The 25° contact angle provides an optimal balance between axial load capacity and speed capability.
- Precision Engineering: Manufactured to P4 tolerance class, this bearing guarantees superior running accuracy, low noise, and minimal vibration, which is essential for precision spindles and machinery.
- Durable Construction: Made from high-grade chrome steel for both rings and balls, the bearing offers high fatigue life and reliability under continuous operation.
71814 ACD/P4DGC Bearing Typical Application Areas
The 71814 ACD/P4DGC is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives & Motors: Servo motors, high-frequency spindles.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments, and auxiliary power units.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
