71952 CD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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71952 CD/P4ADBA Bearing Product Overview & Core Advantages
The 71952 CD/P4ADBA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set is preloaded to Extra Light (Class A) specifications, ensuring minimal axial and radial play for superior system stability. Its primary advantage lies in its ability to handle combined loads—significant radial loads alongside thrust loads in both directions—making it an ideal solution for high-precision, high-stiffness spindle arrangements. The bearing is manufactured to P4A tolerance class, guaranteeing ultra-precise dimensions and runout for demanding operational environments.
71952 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71952 | Basic bearing designation indicating size and type (260mm bore, 360mm OD). |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate thrust capacity. |
| D | Indicates the bearing is part of a duplex pair. |
| DB | Specifies the Back-to-Back mounting arrangement, which provides high moment rigidity. |
| P4A | Denotes an ultra-precision tolerance class with enhanced running accuracy requirements. |
| Open | The bearing is supplied without seals or shields, allowing for customized lubrication systems. |
71952 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & System Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, which is critical for maintaining precision under heavy combined loads.
Superior Load Capacity: With a dynamic load rating of 103,950 lbf and a static load rating of 191,250 lbf, this bearing set is engineered to handle demanding radial and bidirectional axial loads in high-performance applications.
Optimized High-Speed Performance: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and stable operation at high speeds, with a limiting speed of 4,500 rpm. The standard 15° contact angle further enhances high-speed capability.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing ensures predictable and precise performance in the most critical spindle assemblies.
71952 CD/P4ADBA Bearing Typical Application Areas
The 71952 CD/P4ADBA is ideally suited for high-precision machinery and systems requiring maximum rigidity and accuracy, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Applications requiring minimal shaft deflection and high positional accuracy.
- High-Frequency Motors and Spindles: Where rotational accuracy and stability are paramount.
- Aerospace & Defense Positioning Systems: Gyroscopes, radar antennas, and other precision mechanisms.
