71822 CD/P4DBA
71800 Series Super Precision Angular Contact Ball Bearings
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71822 CD/P4DBA Bearing Product Overview & Core Advantages
The 71822 CD/P4DBA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set is preloaded to Extra Light (Class A) standards, providing superior system stiffness and minimizing axial and radial runout. Its P4 tolerance class ensures ultra-precise operation, making it ideal for high-speed spindles and other precision machinery where combination loads must be managed with utmost reliability.
71822 CD/P4DBA Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 71822 | Basic bearing designation indicating the size series and bore diameter (110 mm). |
| C | Designates a 15° contact angle, optimized for high-speed operation and handling combined radial and axial loads. |
| D | Indicates the bearing is part of a duplex pair (two bearings matched). |
| P4 | Specifies the tolerance class P4, denoting ultra-precision manufacturing standards for minimal runout and vibration. |
| DB | Denotes the Back-to-Back mounting arrangement, which provides high moment rigidity and stable thermal performance. |
| A | Specifies the Extra Light preload level, ideal for minimizing friction and heat generation at high speeds while maintaining system stiffness. |
71822 CD/P4DBA Bearing Structural Features & Performance Benefits
High Rigidity & System Stability: The duplex back-to-back (DB) arrangement creates a wide effective spread between the bearing contact points, significantly increasing the system's resistance to moment loads and enhancing overall rigidity. This configuration is critical for maintaining precision under complex loading conditions.
Superior Load Capacity: With a 15° contact angle and a dynamic load rating of 11700 lbf, this bearing is engineered to handle significant combination loads (simultaneous radial and axial forces) efficiently.
Optimized High-Speed Performance: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and smoother operation at the limiting speed of 16,000 rpm. The open design and factory-applied lubrication facilitate effective heat dissipation.
Precision & Accuracy: Manufactured to P4 tolerance standards with tight dimensional controls on bore, outside diameter, and width, this bearing ensures minimal runout and vibration for superior rotational accuracy.
71822 CD/P4DBA Bearing Typical Application Areas
The 71822 CD/P4DBA is ideally suited for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and milling heads.
- High-Speed Motors and Drives: Used in precision electric spindles and high-frequency motors.
- Precision Instrumentation: Applications in measuring devices, optical scanners, and rotary encoders.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and other critical navigation and control systems.
