71811 ACD/HCP4 Super Precision Single Row Angular Contact Ball Bearing 7811
71811 ACD/HCP4 55*72*9 Super Precision High Capacity Single Row Angular Contact Ball Bearing Ceramic Balls High Speed
Super-precision, high-capacity, single row angular contact ball bearing
The 71811 ACD/HCP4 bearing,bore diameter is 55 mm, outside diameter is 72 mm,width is 9 mm,featuring precise dimensions, high static load capacity, P4 precision grade, and hybrid ceramic balls, delivers superior performance and reliability for applications requiring high rotational accuracy and stability.
| Part Number | 71811 ACD/HCP4 | |
| Bearing Type | Angular Contact | |
| Measurement Unit | Metric | |
| Dimensions | Inner Bore Diameter (d) | 55 mm |
| Inner Bore Diameter Tolerance | -0.007mm to 0 | |
| Outer Bore Diameter (D) | 72 mm | |
| Outer Bore Diameter Tolerance | -0.007mm to 0 | |
| Width (B) | 9 mm | |
| Width Tolerance | -0.2mm to 0 | |
| Specifications | Contact Angle | 25° (15°,40° Available) |
| Material | Hybrid (Chrome Steel Rings, Ceramic Balls) | |
| Cage Material | Phenolic | |
| Number of Rows | 1 Single Row | |
| Seal Type | Open | |
| Temperature Range | -30°C to 150°C | |
| Lubrication | Grease or Oil | |
| Tolerance Class | P4 (ABEC-7) | |
| Weight | 0.073 kg | |
| Matched Arrangement | No | |
| Universal Matching Bearing | No | |
| Preload | Not applicable | |
| Load and Speed | Dynamic Radial Load | 9560 N |
| Static Radial Load | 10200 N | |
| Reference Speed For Grease (r/min) | 19,000 rpm | |
| Limiting Speed For Oil(r/min) | 30,000 rpm | |
What's the Performance Features of 71811 ACD/HCP4 Bearing?
The 71811 ACD/HCP4 angular contact ball bearing is engineered for high-precision and high-performance applications, featuring very tight tolerances suitable for precise machinery, the ability to handle both radial and axial loads simultaneously, high-speed operation with stability, low torque and friction for energy efficiency, enhanced rigidity for accuracy under heavy loads, durability with extended service life, effective performance across a wide temperature range.
What's the Applications of the 71811 ACD/HCP4 Bearing?
The 71811 ACD/HCP4 bearing, a high-precision angular contact ball bearing, is designed to meet the demands of advanced applications across multiple industries. Below is an optimized and detailed breakdown of its key application areas:
1. Machine Tools & Precision Machining
- Precision Machine Tool Spindles: Ideal for 5-axis machining centers, heavy-duty cutting equipment, and other CNC machines requiring ultra-precision under high-speed rotation.
- Electric Spindles & High-Speed Milling Units: Reduces friction and thermal expansion in electric spindles, ensuring stable operation and extended tool life.
- Deep-Hole Drilling Equipment: Maintains rigidity and accuracy during deep-hole drilling processes, critical for aerospace and automotive components.
2. Aerospace & Defense
- Aeroengine Gearboxes & Turbine Shaft Systems: Withstands extreme speeds, temperatures, and combined axial/radial loads in turbine shafts and gearboxes.
- Flight Control Systems: Ensures precision in actuators, rotor drives, and other flight-critical systems.
- Satellite Attitude Control Mechanisms: Provides stability and reliability in gyroscopes and attitude control systems for satellites.
3. Industrial Robotics & Automation
- Collaborative Robot Joints & Rotary Axes: Enhances motion accuracy and responsiveness in collaborative robots used for welding, material handling, and assembly tasks.
- High-Precision Reducers: Supports harmonic drives and RV reducers, ensuring smooth and precise motion transmission in robotic systems.
- Rotary Positioning Units: Critical for automated production lines, enabling accurate and repeatable positioning of workpieces.
4. Energy & Heavy Machinery
- Wind Turbine Pitch & Yaw Drive Systems: Handles dynamic loads in pitch and yaw mechanisms, ensuring reliable operation in wind turbines.
- Centrifugal Compressor Shafts: Operates efficiently in oil and gas industries, supporting high-speed compression processes.
- High-Speed Pumps: Used in chemical process pumps and hydraulic pumps, ensuring consistent performance and durability.
5. Medical Equipment
- CT/MRI Rotating Gantry Drive Systems: Minimizes vibration and ensures smooth rotation in imaging systems, reducing image artifacts.
- Precision Transmission Modules in Surgical Robots: Enhances the accuracy and responsiveness of robotic-assisted surgical tools.
- Dental High-Speed Drill Spindles: Maintains low noise and sterility during high-speed operation, ensuring patient comfort and safety.
6. Semiconductor Manufacturing
- Lithography Wafer Alignment & Motion Stages: Delivers nanometer-level precision in cleanroom environments, critical for photolithography and wafer alignment.
- Rotating Components in Vacuum Coating Equipment: Ensures contamination-free operation in vacuum chambers.
- Wafer Cutting/Polishing Equipment Spindles: Provides stability and accuracy during wafer processing, minimizing defects.
7. Special Environment Machinery
- High-Temperature Furnace Drive Systems: Operates reliably in extreme heat environments, such as glass manufacturing furnaces.
- Cryogenic Superconducting Equipment: Supports rotating mechanisms in cryogenic applications, maintaining performance at ultra-low temperatures.
- Cleanroom Robotic Arms: Designed for ultra-high-purity environments, ensuring contamination-free operation in semiconductor and pharmaceutical industries.
| CERTIFICATE | RoHS & REACH, IATF16949:2016 |
| Feature | High Speed and Stiffness,High Running Accuracy,High Load Carrying Capacity |
| Service | OEM&ODM Customized Services |
| Samples | Please Contact Us |
| Service | Online Support,Professional Service |
| Size | Standard,For custom sizes ,please contact us |
| Factory Manufacturer | Yes |
If you need more detailed information , feel free to ask!
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.


