S7206 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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S7206 ACD/HCP4A Bearing Product Overview & Core Advantages
The S7206 ACD/HCP4A is a high-precision, single-row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. Its design is optimized to support combined loads (simultaneous radial and axial loads) efficiently, making it an ideal choice for high-speed spindles and precision machinery. Key advantages include its P4 (ABEC-7) tolerance class for superior running accuracy, the use of ceramic balls for reduced friction and higher limiting speeds, and a phenolic cage for lightweight, high-strength performance at high rotational velocities. This bearing is preloaded and pre-lubricated, ensuring immediate operational readiness and consistent performance.
S7206 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| S7206 | Basic bearing designation, indicating a 30mm bore, 62mm OD, 16mm width angular contact bearing. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a high preload for maximum rigidity and minimal axial/radial deflection. |
| HC | Hybrid Ceramic, signifying the use of ceramic balls for enhanced speed capability and durability. |
| P4A | Denotes a P4 (ABEC-7) tolerance class, ensuring ultra-precise dimensions and runout for high-accuracy applications. |
S7206 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Preload: The high preload (D) and optimized internal geometry provide exceptional system stiffness, critical for minimizing deflection under heavy combined loads in machining and precision positioning.
- Superior High-Speed Performance: The combination of ceramic balls and a lightweight phenolic cage significantly reduces centrifugal forces and friction, enabling a high limiting speed of 26,000 rpm. This makes it a premier high-speed bearing.
- Enhanced Load Capacity: With a 25° contact angle, this bearing is specifically designed to handle significant axial loads in one direction in addition to radial loads, offering a dynamic load rating of 5265 lbf and a static load rating of 3442 lbf.
- Sealed & Lubricated for Longevity: The sealed design protects against contamination, while the factory-applied lubrication ensures consistent performance across its specified temperature range (-30° to 110 °C), reducing maintenance needs.
S7206 ACD/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Robotics: Arm joints and high-accuracy rotary actuators.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units (APUs).
- High-Speed Motors & Drives: Servo motors, spindle drives, and turbochargers.
