7011 CE/HCP4ALDGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7011 CE/HCP4ALDGA Bearing Product Overview & Core Advantages
The 7011 CE/HCP4ALDGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to accommodate combined loads (radial and axial), this bearing features a 15° contact angle and is supplied as a universally matchable (SU) pair, enabling simplified mounting in various configurations like back-to-back (DB) or face-to-face (DF). Its core advantages include ultra-high precision (P4A tolerance), superior high-speed capability facilitated by a phenolic cage and ceramic balls, and reliable operation within a wide temperature range. This makes it an ideal solution for high-rigidity, high-RPM spindles and precision machinery.
7011 CE/HCP4ALDGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7011 | Basic bearing series and size designation (55mm bore, 90mm OD, 36mm width) | Defines the core bearing dimensions. |
| CE | Contact Angle (15°) and High Precision | Optimized for handling axial loads and providing high running accuracy. |
| HC | Hybrid Ceramic (Ceramic balls with steel rings) | Enables higher speeds, reduces friction, and increases bearing service life. |
| P4A | Tolerance Class (Equivalent to ABEC 7/ISO P4) | Indicates ultra-precision manufacturing for minimal runout and vibration. |
| A | Preload: Extra Light (Class A) | Minimizes deflection under light loads, ideal for high-speed applications. |
| LDGA | Lubricated, Universal Matchable (SU) Pair | Supplied as a pre-lubricated, matched set of two bearings for simplified installation and optimal performance. |
7011 CE/HCP4ALDGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and provides electrical insulation. This directly contributes to the bearing's exceptional high-speed performance (limiting speed of 39,000 rpm) and extended service life.
Phenolic Resin Cage: The lightweight and robust phenolic cage ensures stable operation at high speeds, offering excellent dimensional stability and low friction.
Universal Matchable Design (SU): The two bearings in the set are manufactured to universal matching standards, allowing them to be mounted in any preload configuration without performance degradation. This design provides excellent rigidity and accommodates combined loads effectively.
Ultra-Precision P4A Tolerance: Tighter tolerances on bore, outside diameter, and width ensure superior running accuracy, reduced vibration, and precise rotational performance, which is critical for precision machinery.
7011 CE/HCP4ALDGA Bearing Typical Application Areas
- High-Speed Machine Tool Spindles: CNC milling, grinding, and drilling spindles requiring high rigidity and accuracy.
- Precision Robotics: High-precision joints and arms in industrial robots.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotating assemblies.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
- Semiconductor Manufacturing Equipment: Wafer handling robots and precision stages.
