71922 ACD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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71922 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 71922 ACD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As part of the Universal Matchable (SU) series, it is engineered to be paired with an identical bearing to form a preloaded duplex set, significantly enhancing system stability. Its P4A tolerance class ensures ultra-precise dimensions and running accuracy, making it ideal for high-speed spindles and other precision machinery. The bearing is pre-lubricated and features a phenolic cage, contributing to its high-speed capability and smooth operation under combined radial and axial loads.
71922 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71922 | Basic bearing series and size designation (110mm bore, 150mm OD, 40mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a duplex bearing designed for universal matching. |
| P4A | Indicates a super-precision tolerance class, exceeding normal P4 standards for enhanced running accuracy. |
| DGB | Specifies a Light preload (Class B) when the bearing is mounted in a universal duplex arrangement. |
71922 ACD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and duplex universal matchable (SU) configuration allow the bearing to withstand significant combined radial and axial loads. When paired, the preloaded set provides exceptional system stiffness, minimizing deflection under load.
- Super-Precision Performance: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for applications requiring high positional accuracy and fine surface finishes.
- Optimized High-Speed Operation: The lightweight and robust phenolic resin cage ensures stable guidance of the balls at high rotational speeds, contributing to a limiting speed of 16,000 rpm. The 25° contact angle offers an excellent balance between axial load capacity and speed capability.
- Pre-Lubricated & Ready-to-Install: The bearing comes pre-lubricated, simplifying installation and providing immediate protection. The open seal type allows for optimal lubrication flow in well-controlled environments, though it requires a clean operating atmosphere.
71922 ACD/P4ADGB Bearing Typical Application Areas
The 71922 ACD/P4ADGB is engineered for high-performance applications where precision and speed are paramount. Its primary uses include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Motors
- Industrial Pumps and Compressors
- Aerospace and Defense Positioning Systems
