S7011 ACB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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S7011 ACB/HCP4A Bearing Product Overview & Core Advantages
The S7011 ACB/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and high-speed performance. As a P4 (ABEC-7) tolerance class bearing, it guarantees exceptional running accuracy. Its key advantage lies in its ability to support combined loads—simultaneously handling significant radial loads and thrust loads in one direction, facilitated by its 25° contact angle. The combination of a ceramic ball material and a phenolic cage makes it an ideal choice for high-rigidity, high-RPM applications.
S7011 ACB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning | Significance |
|---|---|---|
| S7011 | Basic bearing series and size designation. | Defines the core dimensions: 55mm bore, 90mm OD, 18mm width. |
| ACB | Angular Contact Bearing designation. | Confirms the bearing type is optimized for combined loads. |
| HCP4A | Hybrid Ceramic, P4 Precision, Preload "A". | Indicates ceramic balls for high-speed/low-heat operation, P4 tolerance for precision, and a specific internal preload for enhanced rigidity. |
S7011 ACB/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls with a steel ring significantly reduces centrifugal forces, lowers operating temperature, and extends service life, especially at the high limiting speed of 24,000 rpm.
- High Rigidity & Precision: The P4 (ABEC-7) tolerance class ensures minimal runout and vibration. Combined with the specified preload (HCP4A), the bearing delivers superior stiffness and positional accuracy for demanding spindle applications.
- Optimized for Combined Loads: The 25° contact angle is optimally designed to handle substantial radial and axial loads simultaneously, making it a robust solution for complex loading conditions.
- High-Speed Phenolic Cage: The lightweight and robust phenolic cage provides excellent dimensional stability and low friction at high speeds, contributing directly to the bearing's high rotational capabilities.
- Sealed & Lubricated for Life: As a sealed and pre-lubricated unit, the bearing is protected from contamination and is maintenance-free within its specified operating temperature range of -30°C to 110°C.
S7011 ACB/HCP4A Bearing Typical Application Areas
The S7011 ACB/HCP4A is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors & Spindles: Where low inertia and high RPM are critical.
- Aerospace & Defense Systems: Gyroscopes, navigation systems, and auxiliary power units.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
