7219 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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7219 CD/HCP4A Bearing Product Overview & Core Advantages
The 7219 CD/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Engineered to accommodate combined loads (radial and axial loads simultaneously), this single bearing features a 15° contact angle and is supplied with a preload for enhanced system stiffness and precise shaft positioning. Its construction with ceramic balls and a phenolic cage contributes to superior high-speed performance, making it an ideal solution for high-reliability machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7219 | Basic bearing series and size designation (95mm bore, 170mm OD). |
| CD | Signifies a high contact angle (15°) and optimized internal geometry for high rigidity. |
| HC | Indicates the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4 | Denotes a high precision tolerance class (equivalent to ABEC-7), ensuring minimal runout and vibration. |
| A | Specifies that the bearing is supplied with a preload for immediate high-stiffness operation. |
7219 CD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends service life, especially in high-speed applications.
- High Rigidity & Preload: The 15° contact angle and factory-applied preload provide maximum system stiffness, minimizing deflection under load for superior positional accuracy.
- Optimized High-Speed Performance: The lightweight phenolic resin cage offers excellent strength and guidance at high rotational speeds, contributing to the bearing's limiting speed of 15,000 rpm.
- Exceptional Precision: Manufactured to a P4 (ABEC-7) tolerance class, this bearing guarantees smooth, quiet, and vibration-free operation, critical for precision machinery.
- High Load Capacity: With a dynamic load rating of 31,050 lbf and a static load rating of 27,000 lbf, it reliably handles significant combined loads.
7219 CD/HCP4A Bearing Typical Application Areas
The 7219 CD/HCP4A is ideally suited 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 Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units (APUs).
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
- Advanced Pumps and Compressors: For handling high rotational speeds with minimal vibration.
