71822 ACD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71822 ACD/P4DGA Bearing Product Overview & Core Advantages
The 71822 ACD/P4DGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-lubricated set of two, it enables simplified mounting in back-to-back (DB) or face-to-face (DF) arrangements to handle combined loads and moments. Its P4 tolerance class and extra light preload (Class A) ensure smooth, quiet operation at high speeds, making it ideal for high-precision spindles and other demanding machinery.
71822 ACD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71822 | Basic bearing series and size designation (110mm bore, 140mm OD) |
| ACD | 25° contact angle design optimized for high axial load capacity and rigidity |
| P4 | High precision tolerance class ensuring minimal runout and vibration |
| DGA | Universal matchable (SU) pair supplied with extra light preload |
71822 ACD/P4DGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The 25° contact angle and optimized internal geometry provide excellent resistance to combined radial and axial loads. When mounted as a universal matched pair, the bearing arrangement offers enhanced system stiffness and moment load capacity.
High-Speed Performance: The phenolic resin cage ensures low friction and excellent dimensional stability at high rotational speeds, contributing to the bearing's limiting speed of 16,000 rpm. The P4 precision grade minimizes vibration for smooth operation.
Precision Engineering: Manufactured to P4 tolerance class with tight dimensional controls on bore, outside diameter, and width. The extra light preload (Class A) reduces noise and improves positional accuracy in precision applications.
Optimized Material Selection: Constructed from chrome steel for rings and balls, providing high wear resistance and durability. The phenolic cage offers excellent strength-to-weight ratio and lubrication compatibility.
71822 ACD/P4DGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring exceptional accuracy and rigidity
- High-Speed Machining Centers: Applications demanding both high rotational speeds and precise positioning
- Precision Instrumentation: Measuring equipment and analytical instruments where minimal vibration is critical
- Robotic Systems: High-accuracy robotic arms and automation equipment
- Medical Equipment: CT scanners and other medical imaging devices requiring smooth, precise rotation
