71922 ACD/P4ADBC
71900 Series Super Precision Angular Contact Ball Bearings
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71922 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 71922 ACD/P4ADBC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex back-to-back (DB) arrangement bearing set is preloaded to Moderate / Class C specifications, providing superior stability and minimizing axial and radial runout. Its P4A tolerance class ensures ultra-precise rotational performance, making it ideal for high-speed spindles and other precision machinery where high rigidity and accurate positioning are critical. The bearing is supplied pre-lubricated for immediate installation and reliable operation.
71922 ACD/P4ADBC 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 | Duplex Back-to-Back (DB) matched arrangement. |
| P4A | High precision tolerance class for superior running accuracy. |
| DBC | Specific preload designation (Moderate / Class C). |
71922 ACD/P4ADBC Bearing Structural Features & Performance Benefits
Optimized Rigidity and Load Capacity: The duplex back-to-back configuration creates a rigid bearing system that can withstand combined loads (radial and axial) from both directions simultaneously. This setup significantly increases the moment rigidity of the shaft, which is crucial for applications with high overturning moments.
High-Speed Capability: The lightweight phenolic cage minimizes centrifugal forces, contributing to the high limiting speed of 16,000 rpm. The 25° contact angle provides an excellent balance between radial load capacity and axial load capacity, suitable for high-speed operation.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width. This ensures minimal runout and vibration, leading to smoother operation and extended service life in precision equipment.
Durable Construction: Both rings and balls are made from high-grade chrome steel, providing excellent wear resistance and durability under high-stress conditions.
71922 ACD/P4ADBC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme precision and rigidity.
- Precision Gearboxes: Applications where low noise, high speed, and accurate shaft positioning are essential.
- High-Frequency Motors and Spindles: For CNC machining centers and other automated manufacturing equipment.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
- Aerospace Actuators and Control Systems: Where reliability and precision under combined loads are mandatory.
