7206 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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7206 ACD/HCP4A Bearing Product Overview & Core Advantages
The 7206 ACD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and high-speed operation. Its defining characteristic is the 25° contact angle, which is optimized to support significant combined loads—handling both radial and one-directional axial loads simultaneously. Manufactured to the exacting P4 (ABEC-7) tolerance class, this bearing ensures exceptional running accuracy and rotational stability. The combination of a phenolic cage, ceramic balls, and factory-applied lubrication makes it an ideal solution for machine tool spindles and other high-performance machinery where high rigidity and low heat generation are critical.
Model Code Breakdown
| Code Segment | Interpretation | Technical Significance |
|---|---|---|
| 7206 | Basic Designation | Indicates a metric, single-row angular contact ball bearing with a 30mm bore, 62mm OD, and 16mm width. |
| AC | Angular Contact | Specifies a 25° contact angle design for handling combined loads. |
| D | High Load Capacity Design | Denotes an internal design optimized for increased radial dynamic load rating (5265 lbf). |
| HC | Hybrid Ceramic | Signifies the use of ceramic balls (Silicon Nitride) in a steel ring structure, reducing weight and enabling higher speeds. |
| P4 | Tolerance Class | Corresponds to ABEC-7, indicating ultra-high precision with tight dimensional and running accuracy tolerances. |
7206 ACD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces and friction, enabling a high limiting speed of 40,000 rpm. This construction also provides superior resistance to electrical arcing and operates effectively across a wide temperature range (-30° to 110 °C).
- Optimized Contact Angle & Preload: The 25° contact angle is ideal for applications requiring high axial stiffness. The bearing is supplied with a light preload, ensuring precise shaft positioning, minimal runout, and enhanced system high rigidity from the moment of installation.
- High-Performance Phenolic Cage: The lightweight and robust phenolic resin cage contributes to smooth operation at ultra-high speeds, offering excellent dimensional stability and low friction with the ceramic balls.
- Superior Load Capacity: Engineered for demanding applications, this bearing offers a high radial dynamic load rating of 5265 lbf, making it capable of handling significant combined loads in a compact bearing size (30x62x16 mm).
7206 ACD/HCP4A Bearing Typical Application Areas
The 7206 ACD/HCP4A is designed for high-end industrial and precision applications, including:
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Speed Motors and Drives: Spindles for PCB drilling, dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
- Medical Equipment: Centrifuges and high-speed imaging scanners.
