7201 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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7201 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The 7201 ACDGA/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior speed performance. Its defining characteristics include a 25° contact angle and P4A tolerance class, ensuring exceptional running accuracy. The use of ceramic balls and a phenolic resin cage enables significantly higher limiting speeds and reduced rotational friction. This bearing is pre-lubricated and designed as a Universal Matchable (SU) component, allowing for precise axial preload control when mounted in sets, making it ideal for high-reliability, high-speed spindles and machinery.
7201 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7201 | Basic bearing series and size designation (12mm bore, 32mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| DGA | Duplex arrangement, Ground preload (Extra light / Class A). |
| HCP4A | Hybrid Ceramic (balls), Phenolic cage, and P4A super-precision tolerance class. |
7201 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls drastically reduces centrifugal forces, lowers operating temperature, and extends bearing life, especially at very high speeds. This makes it a premier high-speed bearing.
Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability and low friction, further contributing to the bearing's high limiting speed of 95,000 rpm.
Super-Precision P4A Tolerance: Manufactured to ABEC 7 / P4A standards, this bearing provides extremely tight dimensional and running accuracy, resulting in superior system rigidity, reduced vibration, and enhanced positional accuracy.
Universal Matching (SU): As a universal matchable bearing, it can be mounted in any combination (back-to-back, face-to-face, or tandem) with other SU bearings from a matched set to achieve the required preload and system stiffness without selective assembly.
7201 ACDGA/HCP4A Bearing Typical Application Areas
The 7201 ACDGA/HCP4A is specifically designed for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed CNC machining centers, grinding spindles, and milling spindles.
- Precision Instrumentation: High-speed measuring and testing equipment.
- Aerospace & Defense: Gyroscopes, navigation systems, and auxiliary power units (APUs).
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
