7011 ACE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7011 ACE/HCP4ADGA Bearing Product Overview & Core Advantages
The 7011 ACE/HCP4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and performance. As part of a universally matchable (SU) set, it is engineered to accommodate combined radial and axial loads simultaneously. Its defining features include an extra light preload (Class A) for minimal running torque and high rotational accuracy, a P4A tolerance class for superior dimensional precision, and ceramic balls that contribute to higher speed capability and longer service life. This bearing is pre-lubricated and operates effectively within a wide temperature range, making it an ideal choice for high-reliability, high-speed applications.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7011 | Basic bearing series and size designation (55mm bore, 90mm OD). |
| ACE | Specific internal design and performance characteristics. |
| HC | Hybrid Ceramic: Indicates the use of ceramic balls. |
| P4A | High-Precision Tolerance Class, exceeding ABEC 7/ISO P4 standards for runout and dimensional accuracy. |
| DGA | Universal Matchable (SU) arrangement. Two bearings are supplied as a matched set for preload control. |
7011 ACE/HCP4ADGA Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of steel rings and silicon nitride (Si3N4) ceramic balls reduces centrifugal forces, lowers operating temperature, and enables higher limiting speeds (34,000 rpm). Ceramic's inherent properties also provide superior resistance to wear and electrical arcing.
- Precision & Rigidity: Manufactured to a P4A tolerance class and featuring a 25° contact angle with an extra light preload, this bearing delivers high running accuracy, excellent stiffness, and rapid response to load changes.
- Phenolic Resin Cage: The lightweight and robust phenolic cage ensures stable operation at high speeds, offering good guidance and strength with minimal friction.
- Universal Matchability (SU): Bearings in the set are universally matchable, allowing for flexible mounting arrangements (DB, DF, DT) to achieve the desired preload and rigidity for the application.
- Optimized Load Capacity: The design is optimized to handle significant combined loads, with a dynamic load rating of 5850 lbf and a static load rating of 5220 lbf.
7011 ACE/HCP4ADGA Bearing Typical Application Areas
The 7011 ACE/HCP4ADGA is suited for high-performance machinery where precision, speed, and reliability are critical. Key application areas include:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors and Spindles
- Aerospace & Defense Actuation Systems
- Medical and Dental Handpiece Drives
- Advanced Robotics and Automation
