71815 CD/P4DGC
71800 Series Super Precision Angular Contact Ball Bearings
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71815 CD/P4DGC Bearing Product Overview & Core Advantages
The 71815 CD/P4DGC is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Operating under the stringent P4 tolerance class, this bearing is engineered to handle combined loads (simultaneous radial and axial loads) efficiently. Its universal matchable (SU) design allows two bearings to be paired in a back-to-back or face-to-face arrangement to optimize system performance. Preloaded with a moderate (Class C) preload, it delivers high running accuracy, excellent stiffness, and is suitable for high-speed operation, making it ideal for the most demanding precision machinery.
71815 CD/P4DGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71815 | Basic bearing designation, indicating a super-precision angular contact ball bearing with a 75 mm bore. |
| CD | Indicates a 15° contact angle and a specific internal design optimized for high rigidity and speed. |
| P4 | Denotes the tolerance class, signifying extremely tight dimensional and running accuracy standards superior to ABEC-7. |
| DGC | Signifies a Universal Matchable (SU) bearing supplied with a Moderate (Class C) preload. |
71815 CD/P4DGC Bearing Structural Features & Performance Benefits
- High Rigidity and Running Accuracy: The 15° contact angle and moderate preload work in concert to provide exceptional system stiffness and minimize axial and radial runout, which is critical for precision machining and high-speed spindles.
- Superior Load Capacity: Engineered to support significant combined loads. With a dynamic load rating of 5152 lbf and a static load rating of 7650 lbf, it offers reliable performance under demanding operating conditions.
- Optimized High-Speed Performance: The lightweight phenolic cage ensures low inertial forces and stable operation, contributing to the high limiting speed of 22,000 rpm. The open design facilitates efficient lubrication management.
- Precision Materials and Construction: Manufactured from chrome steel for both rings and balls, ensuring high durability and fatigue life. The tight P4 tolerance class guarantees consistent, high-precision performance.
71815 CD/P4DGC Bearing Typical Application Areas
The 71815 CD/P4DGC is a critical component in high-performance machinery where precision, speed, and rigidity are non-negotiable. Its primary applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Internal and external grinding applications.
- High-Frequency Motors and Spindles: Where minimal vibration and high rotational accuracy are required.
- Industrial Pumps and Compressors: For high-speed rotor support.
- Aerospace and Defense Instrumentation: Gyroscopes, radar systems, and other precision guidance systems.
