71822 CD/P4DBB
71800 Series Super Precision Angular Contact Ball Bearings
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71822 CD/P4DBB Bearing Product Overview & Core Advantages
The 71822 CD/P4DBB is a precision angular contact ball bearing configured as a duplex back-to-back (DB) pair with a Light (Class B) preload. Engineered for the most demanding applications, this matched set delivers exceptional rotational accuracy and system rigidity. Its primary advantage lies in its ability to handle combined loads—significant radial and bidirectional axial loads—simultaneously, making it an ideal solution for high-precision spindles and machinery requiring superior running accuracy and minimal deflection.
71822 CD/P4DBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71822 | Basic bearing designation, indicating a metric series angular contact ball bearing. |
| C | Designates a 15° contact angle, optimized for high-speed operation with moderate axial load capacity. |
| D | Indicates the bearing is part of a duplex (matched) pair. |
| P4 | Specifies a high-precision tolerance class (equivalent to ABEC 7), ensuring extremely tight dimensional and running accuracy. |
| DBB | Defines the duplex arrangement as Back-to-Back (DB). This configuration provides high moment rigidity and excellent stability under complex load conditions. |
71822 CD/P4DBB Bearing Structural Features & Performance Benefits
High Rigidity & System Stability: The back-to-back (DB) duplex arrangement creates a wide, effective spread between load centers. This design significantly increases the bearing system's resistance to moment loads and tilting, providing exceptional stiffness that is critical for maintaining precision in machine tool spindles.
Optimized Load Capacity: With a 15° contact angle and a dynamic load rating of 11,700 lbf, this bearing set is engineered to handle substantial combined radial and axial loads from both directions simultaneously.
Precision High-Speed Performance: The phenolic resin cage is lightweight and exhibits excellent performance at high speeds, contributing to lower operating temperatures and a limiting speed of 16,000 rpm. The P4 tolerance class ensures minimal vibration and smooth operation essential for high-speed applications.
Preload & Accuracy: The bearings are supplied with a Light (Class B) preload. This eliminates internal clearance, increases bearing stiffness, and enhances rotational accuracy, leading to improved machining finish and tool life.
71822 CD/P4DBB Bearing Typical Application Areas
The 71822 CD/P4DBB is specified 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 Rotary Systems: CNC indexing heads, rotary tables, and robotic arm joints.
- High-Frequency Motors & Spindles: Where minimal runout and high rotational accuracy are required.
- Medical & Laboratory Equipment: Centrifuges and other precision rotating devices.
