7011 ACBGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7011 ACBGA/HCP4A Bearing Product Overview & Core Advantages
The 7011 ACBGA/HCP4A is a single-row angular contact ball bearing designed for the most demanding high-precision and high-speed applications. Engineered to accommodate combined loads, primarily high axial loads in one direction, its defining features include an Extra Light (A) preload for maximum running accuracy, a P4A super-precision tolerance class, and a phenolic resin cage for superior performance at high rotational speeds. This bearing is universally matchable (SU), allowing for precise arrangement in pairs to support bidirectional axial loads, making it an ideal solution for spindles requiring exceptional rigidity and rotational accuracy.
7011 ACBGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7011 | Standard bore (55mm), outside diameter (90mm), and width (18mm) dimensions. | Defines the bearing size and basic geometry. |
| AC | Angular Contact design. | Optimized for combined radial and axial loads. |
| BGA | Ball material: Silicon Nitride (Ceramic). | Reduces centrifugal forces, lowers friction, and enables higher speeds and longer service life. |
| HC | Cage material: Phenolic Resin. | Provides high strength-to-weight ratio, excellent acceleration characteristics, and is suitable for high-speed operation. |
| P4A | Tolerance Class P4A (super precision). | Guarantees extremely tight dimensional and running accuracy for applications demanding minimal runout and vibration. |
7011 ACBGA/HCP4A Bearing Structural Features & Performance Benefits
High-Speed Performance: The combination of a lightweight phenolic resin cage (HC) and low-density ceramic balls (BGA) significantly reduces centrifugal forces and inertial mass. This design is critical for achieving the high limiting speed of 34,000 rpm, making it a premier high-speed bearing.
Running Accuracy and Rigidity: The Extra Light preload (A) eliminates internal clearance, ensuring precise shaft positioning and enhanced system stiffness from the moment of installation. This, combined with the P4A precision class, results in superior rotational accuracy and minimal vibration.
Load Capacity: With a 25° contact angle, this bearing is optimized to handle significant axial loads in addition to radial loads. The universal matchable (SU) design allows two bearings to be paired in various configurations (e.g., back-to-back, face-to-face) to create a system capable of supporting combined loads and bidirectional axial thrust.
Pre-Lubrication: The bearing is factory-lubricated with a high-performance grease suitable for its specified temperature range of -30°C to 110°C, ensuring immediate operational readiness and reliable initial performance.
7011 ACBGA/HCP4A Bearing Typical Application Areas
The 7011 ACBGA/HCP4A is specified for high-performance machinery where speed, precision, and reliability are paramount. Key applications 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.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments, and other critical rotating assemblies.
