7011 ACE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7011 ACE/HCP4A Bearing Product Overview & Core Advantages
The 7011 ACE/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and reliability. This single-row bearing is designed to accommodate high combined loads, primarily thrust loads in one direction, with a 25° contact angle for optimal performance. Its key advantages include superior high-speed capability enabled by a phenolic cage and ceramic balls, P4 (ABEC-7) precision tolerance for minimal runout, and availability with preload for enhanced system rigidity. This configuration makes it ideal for high-performance spindles and precision machinery.
7011 ACE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7011 | Basic bearing series and size designation (55mm bore, 90mm OD, 18mm width) | Defines the core bearing dimensions. |
| ACE | Internal design code for optimized contact conditions and high-speed performance | Indicates enhanced internal geometry for superior high-speed operation. |
| HC | Hybrid Ceramic design (Steel rings with Ceramic balls) | Reduces centrifugal forces, lowers friction, and increases limiting speed and service life. |
| P4 | Tolerance class equivalent to ABEC-7 | Guarantees extremely tight dimensional and running accuracy for precision applications. |
7011 ACE/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces weight and inertial forces within the bearing. This is critical for achieving the high limiting speed of 35,000 rpm, as it minimizes heat generation and skidding at ultra-high velocities.
- Phenolic Resin Cage (Retainer): The lightweight and robust phenolic cage provides excellent dimensional stability and low friction at high speeds. It contributes to smooth operation and is well-suited for the demanding conditions of high-speed spindles.
- 25° Contact Angle & Preload: The 25° contact angle is optimized to handle significant thrust loads alongside moderate radial loads. The availability of preload eliminates internal clearance, resulting in superior shaft positioning accuracy, increased stiffness, and reduced vibration and noise under operational loads.
- P4 Super-Precision: Manufactured to P4 tolerance class, this bearing ensures minimal radial and axial runout, which is paramount for applications requiring extreme rotational accuracy and surface finish quality.
7011 ACE/HCP4A Bearing Typical Application Areas
The 7011 ACE/HCP4A is specifically designed for high-performance machinery where speed, precision, and rigidity are non-negotiable. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for electric motors operating at very high RPM.
- Robotics: High-accuracy joints and arm actuators.
- Medical Equipment: Dental handpieces and surgical drill motors.
