71911 ACEGA/HCP4AL
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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71911 ACEGA/HCP4AL Bearing Product Overview & Core Advantages
The 71911 ACEGA/HCP4AL is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered with ceramic balls and manufactured to P4A tolerance class, this bearing delivers superior speed capabilities, reduced friction, and extended service life. Its 25° contact angle is optimized for handling combined loads, efficiently supporting significant thrust loads in addition to radial loads. The extra light preload (Class A) ensures minimal deflection and high running accuracy, making it ideal for high-speed spindles and precision machinery where rigidity and rotational precision are critical.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing series and size designation (55mm bore, 80mm OD, 13mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| EGA | Specific internal design and preload designation (Extra light preload / Class A). |
| HC | Indicates the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4A | Specifies the high-precision tolerance class, exceeding ABEC 7 standards. |
71911 ACEGA/HCP4AL Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear. This enables higher limiting speeds (39,000 rpm) and provides electrical insulation, mitigating damage from electrical arcing.
- Precision & Rigidity: Manufactured to P4A tolerance class with extremely tight dimensional tolerances, this bearing ensures exceptional running accuracy and system rigidity. The extra light preload minimizes axial and radial play under operational conditions.
- Phenolic Cage: The lightweight and robust phenolic resin cage offers excellent performance at high speeds, providing strength, low friction, and guidance for the ceramic balls.
- Superior Load Capacity: With a dynamic load rating of 3330 lbf and static load rating of 2250 lbf, the bearing is engineered to handle demanding combined radial and axial loads.
- Universal Matching (SU): This bearing is universally matchable, allowing two bearings to be paired in a back-to-back (DB) or face-to-face (DF) arrangement without selective assembly, simplifying installation and ensuring optimal preload and stiffness.
71911 ACEGA/HCP4AL Bearing Typical Application Areas
The 71911 ACEGA/HCP4AL is specified for high-performance applications where speed, precision, and reliability are non-negotiable. Key industries and equipment include:
- High-Frequency Machine Tool Spindles: CNC milling, grinding, and drilling spindles.
- Precision Robotics: High-accuracy joints and arm assemblies.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
- Medical Equipment: Dental handpieces, high-speed centrifuges, and imaging devices.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
