7011 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7011 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The 7011 ACEGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. As a single bearing from a universally matchable (SU) set, it is designed to accommodate combined loads, specifically high radial loads and axial loads in one direction. Its defining characteristics include an Extra light (Class A) preload for minimal running torque and high rigidity, a P4A tolerance class for superior dimensional and running accuracy, and ceramic balls that contribute to higher speed capability and longer service life. This bearing is the ideal choice for high-speed spindles and other precision machinery where reliability and precision are paramount.
7011 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7011 | Basic bearing series and size code. | Indicates a 55mm bore, 90mm OD, and 18mm width. |
| AC | 25° Contact Angle. | Optimized for supporting high axial loads in combination with radial loads. |
| EGA | Extra Light Preload (Class A). | Provides high rigidity and precise rotational accuracy with low friction and heat generation. |
| HC | Hybrid Ceramic (Silicon Nitride balls). | Enables higher limiting speeds, reduced weight, and extended lubrication life due to the properties of ceramic. |
| P4A | High-Precision Tolerance Class. | Exceeds ABEC-7 standards, ensuring extremely tight dimensional and running accuracy for critical applications. |
7011 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
The 7011 ACEGA/HCP4A's performance is a direct result of its advanced material selection and precision engineering.
- High Rigidity and Precision: The Class A preload eliminates internal clearance, resulting in a stiff bearing system that minimizes deflection under load and ensures exceptional running accuracy. This is further enhanced by the P4A tolerance class.
- Superior High-Speed Performance: The combination of hybrid ceramic balls and a lightweight phenolic resin cage is critical for high-speed operation. Ceramic balls reduce centrifugal forces and friction, while the phenolic cage offers excellent strength-to-weight ratio and smooth operation at the limiting speed of 34,000 rpm.
- Enhanced Load Capacity: The 25° contact angle is optimally designed to handle significant axial loads in addition to radial loads, making it suitable for applications with combined loading conditions.
- Extended Service Life: The chrome steel rings provide a durable raceway, while the ceramic balls are harder and more wear-resistant than steel, leading to reduced wear and a longer operational lifespan.
7011 ACEGA/HCP4A Bearing Typical Application Areas
This high-precision, high-speed angular contact ball bearing is ideally suited for the most demanding rotational systems, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for CNC machinery and robotics.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instruments.
- Medical Equipment: High-speed dental handpieces and surgical tools.
