7011 ACEGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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7011 ACEGB/HCP4A Bearing Product Overview & Core Advantages
The 7011 ACEGB/HCP4A is a single-row angular contact ball bearing engineered for high-precision and high-speed applications. Its defining characteristic is the 25° contact angle and Universal Matchable (SU) design, allowing two bearings to be precisely matched for optimal preload and rigidity in a back-to-back or face-to-face arrangement. Manufactured to the exacting P4A tolerance class, this bearing delivers exceptional running accuracy and is pre-lubricated for immediate use, making it an ideal solution for machine tool spindles and other demanding equipment requiring superior rotational performance and high rigidity.
7011 ACEGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
- 7011: Basic designation denoting a metric series bearing with a 55mm bore and 90mm outside diameter.
- AC: Angular Contact design with a 25° contact angle.
- E: Optimized internal design featuring a larger ball complement and reinforced shoulders for increased load capacity.
- GB: Signifies a Universal Matchable (SU) bearing. Two bearings can be paired to form a pre-loaded set.
- /HC: Hybrid Ceramic construction, indicating Ceramic balls and steel rings for enhanced speed capability and reduced wear.
- P4A: The tolerance class, specifying extremely tight dimensional and running accuracy tolerances superior to ABEC 7/ISO P4.
7011 ACEGB/HCP4A Bearing Structural Features & Performance Benefits
High-Speed & High-Rigidity Performance: The combination of a phenolic resin cage, lightweight ceramic balls, and a 25° contact angle enables very high limiting speeds (34,000 rpm) while providing excellent resistance to operational deflection. The optimized internal geometry ensures stable operation under combined (radial and axial) loads.
Precision & Longevity: Manufactured to P4A tolerance standards, this bearing guarantees minimal runout and vibration. The hybrid ceramic design offers superior resistance to electrical erosion and operates effectively within a wide temperature range of -30°C to 110°C. The phenolic cage provides excellent strength and lubrication retention at high speeds.
Universal Matching for Simplified Assembly: The Universal Matchable (SU) feature allows for the direct pairing of two identical bearings without selective sorting, simplifying procurement, inventory, and assembly while ensuring consistent, high-performance preload in the final application.
7011 ACEGB/HCP4A Bearing Typical Application Areas
This high-precision, high-speed angular contact bearing is ideally suited for:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Robotics and Automation Arms
- High-Frequency Motors and Spindles
- Medical Equipment (e.g., Dental handpieces, Centrifuges)
- Aerospace Instrumentation and Control Systems
