71922 ACD/P4AQBCB
71900 Series Super Precision Angular Contact Ball Bearings
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71922 ACD/P4AQBCB Bearing Product Overview & Core Advantages
The 71922 ACD/P4AQBCB is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched set arrangement of four bearings in a back-to-back (QBC) configuration provides superior stability and load-handling capabilities. Engineered to a P4A tolerance class, it delivers outstanding rotational accuracy, making it ideal for high-speed spindles and precision machinery. Its light preload (Class B) ensures optimal performance by minimizing deflection under operational stresses, while the 25° contact angle effectively accommodates combined radial and axial loads.
71922 ACD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71922 | Basic bearing designation indicating size series and bore diameter (110 mm) |
| ACD | Angular Contact Design with 25° contact angle |
| P4A | High precision tolerance class with enhanced running accuracy |
| QBC | Quadruplex Back-to-Back matched arrangement for maximum rigidity |
| B | Light preload classification to minimize deflection |
71922 ACD/P4AQBCB Bearing Structural Features & Performance Benefits
Exceptional Rigidity & Load Capacity: The quadruplex back-to-back arrangement creates an extremely rigid bearing system capable of withstanding heavy combined loads and moments. With a radial dynamic load rating of 35,100 lbf and static load rating of 61,875 lbf, this bearing set delivers reliable performance under demanding conditions.
High-Speed Performance: Featuring a phenolic cage material and optimized internal geometry, the bearing achieves a limiting speed of 10,000 rpm. The precision-ground chrome steel balls (12.7 mm diameter, 28 count) and raceways ensure smooth operation at high rotational speeds.
Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional controls (bore and OD tolerance: -0.004mm to 0), this bearing provides exceptional running accuracy and minimal vibration for precision applications.
Optimized Thermal Performance: The back-to-back configuration allows for effective thermal expansion management, maintaining precision alignment across the operating temperature range of -30°C to 110°C.
71922 ACD/P4AQBCB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme precision and rigidity
- Precision Gearboxes: Industrial transmission systems demanding high accuracy and load capacity
- Robotic Systems: High-precision robotic arms and automation equipment
- Aerospace Components: Aircraft control systems and auxiliary power units
- Medical Equipment: High-speed dental handpieces and surgical tools
- Test & Measurement Instruments: Precision rotary tables and coordinate measuring machines
