7210 CD/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7210 CD/P4A Bearing Product Overview & Core Advantages
The 7210 CD/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, it is optimized to handle combined loads—simultaneous radial and axial forces. Its 15° contact angle provides superior axial load capacity while maintaining high-speed performance. This single bearing with preload is a compact and reliable solution for high-performance spindles and precision machinery.
7210 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7210 | Basic bearing designation: 50mm bore, 90mm OD, 20mm width. |
| C | Designates a 15° contact angle. |
| D | Indicates the bearing is supplied with a preload for enhanced rigidity. |
| P4 | Specifies the high-precision tolerance class (equivalent to ABEC-7). |
| A | Denotes that the bearing's internal geometry and tolerances have been optimized for high-speed operation. |
7210 CD/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The angular contact design and application of preload eliminate internal clearance, resulting in a very stiff bearing assembly that minimizes deflection under load, crucial for machining accuracy.
Superior Load Capacity: Engineered to support significant combined (radial and axial) loads. The 15° contact angle is ideal for applications with substantial axial thrust requirements.
Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel components and optimized internal geometry contribute to a high limiting speed of 26,000 rpm.
Enhanced Durability: Manufactured from high-grade chrome steel and fitted with a robust cage, this bearing offers excellent fatigue life and reliability in demanding operating conditions.
7210 CD/P4A Bearing Typical Application Areas
The 7210 CD/P4A is ideally suited for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: CNC machining centers, grinding spindles.
- High-Speed Motors and Spindles: Electric motor spindles, high-frequency spindles.
- Precision Robotics: Robotic arm joints and rotary actuators.
- Aerospace and Defense Systems: Gyroscopes, radar equipment, and auxiliary power units.
