7226 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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7226 ACD/HCP4A Bearing Product Overview & Core Advantages
The 7226 ACD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing is distinguished by its 25° contact angle and P4 (ABEC-7) tolerance class, ensuring superior running accuracy and minimal vibration. Its core advantages include the ability to accommodate combined radial and axial loads simultaneously, high-speed capability facilitated by a phenolic cage and ceramic balls, and high rigidity due to its precision-ground construction. It is preloaded and pre-lubricated, making it ideal for high-reliability, high-speed spindles and precision machinery.
7226 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7226 | Basic bearing series and size designation (130mm bore, 230mm OD). |
| ACD | Angular Contact Design with a 25° contact angle and optimized internal geometry for high axial load capacity. |
| HCP4A | A composite suffix. HC denotes a hybrid ceramic design with ceramic balls. P4 specifies a P4 (ABEC-7) super-precision tolerance. A indicates a specific internal design and that the bearing is supplied with a preload. |
7226 ACD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear. This extends service life and enables higher limiting speeds compared to all-steel bearings.
- High Rigidity & Precision: Manufactured to P4 tolerance class, this bearing provides exceptional dimensional stability and running accuracy, which is critical for minimizing vibration and maintaining precision in spindle applications.
- Optimized High-Speed Performance: The lightweight phenolic cage offers excellent strength and guidance at high speeds, while the 25° contact angle provides an optimal balance between radial and axial load capacity for high-speed operation.
- Superior Load Capacity: Engineered to handle significant combined loads, with a high dynamic and static load rating, ensuring reliable performance under demanding conditions.
- Preload & Readiness: Supplied with a preload, the bearing achieves immediate high stiffness and optimal running geometry upon installation. It is pre-lubricated for immediate operation.
7226 ACD/HCP4A Bearing Typical Application Areas
The 7226 ACD/HCP4A is designed for high-performance machinery where speed, precision, and reliability are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling spindles and high-frequency motor spindles.
- High-Speed Automation: Robotics, CNC machining centers, and pick-and-place units.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units.
