71911 CD/P4A Super Precision Single Row Angular Contact Ball Bearing 7911
71911 CD/P4A 55*80*13 mm Super Precision High Capacity Single Row Angular Contact Ball Bearing
Super-precision, high-capacity D design, single row angular contact ball bearing
The 71911 CD/P4A bearing,bore diameter is 55 mm, outside diameter is 80 mm,width is 13 mm,featuring precise dimensions, high static load capacity, P4A precision grade, delivers superior performance and reliability for applications requiring high rotational accuracy and stability.
| Part Number | 71911 CD/P4A | |
| 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) | 80 mm | |
| Outer Bore Diameter Tolerance | -0.007mm to 0 | |
| Width (B) | 13 mm | |
| Width Tolerance | -0.2mm to 0 | |
| Specifications | Contact Angle | 15° (25°,40° Available) |
| Material | Chrome Steel | |
| Cage Material | Phenolic | |
| Number of Rows | 1 Single Row | |
| Seal Type | Open | |
| Temperature Range | -30°C to 150°C | |
| Lubrication | Oil,Grease | |
| Tolerance Class | P4A better than P4 (ABEC-7) | |
| Weight | 0.17 kg | |
| Matched Arrangement | No | |
| Universal Matching Bearing | No | |
| Preload | Not applicable | |
| Load and Speed | Dynamic Radial Load | 19500 N |
| Static Radial Load | 14600 N | |
| Reference Speed For Grease (r/min) | 16,000 rpm | |
| Limiting Speed For Oil(r/min) | 26,000 rpm | |
What's the Performance Features of 71911 CD/P4A Bearing?
The 71911 CD/P4A 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 71911 CD/P4A Bearing?
The 71911 CD/P4A bearing, known for its high precision, rigidity, and long service life, finds applications across a wide range of industries. Below is a detailed breakdown based on your provided categories:
1. Machine Tool Industry
- CNC Machine Tool Spindles: Ensures high-speed and precision operations in CNC machines.
- Grinding Machine Electric Spindles: Supports grinding processes with high accuracy and minimal vibration.
- Machining Center Rotary Axes: Provides reliable performance for rotary axes in machining centers, ensuring smooth operation and precise positioning.
2. Precision Instruments & Industrial Robots
- Robot Joint Reducers: Facilitates smooth and precise movements in robotic joints, enhancing the efficiency and accuracy of industrial robots.
- Rotary Joint Drive Units: Offers stable and accurate rotation for various drive units, crucial for maintaining operational precision.
- Optical Instruments (e.g., Semiconductor Lithography Machines): Enables ultra-precise alignment and movement, essential for semiconductor manufacturing processes.
- High-Precision Measurement Equipment: Ensures reliability and accuracy in measurement instruments, contributing to consistent and dependable results.
3. Aerospace & Defense
- Aircraft Engine Auxiliary Power Units (APUs): Provides durable and reliable support in auxiliary power systems, ensuring continuous operation under demanding conditions.
- Helicopter Transmission Systems: Supports efficient power transmission in helicopter gearboxes, critical for safe and reliable flight operations.
- Gyroscope Mounts in Missile Guidance Systems: Enhances the stability and accuracy of gyroscopes used in missile guidance systems.
- Radar Antenna Rotating Mechanisms: Ensures smooth and precise rotation of radar antennas, vital for effective surveillance and tracking.
4. New Energy Vehicles & Electric Drives
- Electric Vehicle Motor Spindles: Supports high-performance electric motors in vehicles, contributing to improved efficiency and longevity.
- Hybrid Transmission Systems: Facilitates smooth transitions between different drive modes in hybrid vehicles, improving overall vehicle performance.
- High-Speed Rotors in Fuel Cell Air Compressors: Ensures reliable operation of high-speed rotors in fuel cell air compressors, crucial for optimal system performance.
5. Medical Equipment
- CT Scanner Rotating Gantries: Provides smooth and precise rotation for CT scanner gantries, enhancing image quality and diagnostic capabilities.
- Dental Drill Drive Units: Ensures precise and controlled movements in dental drills, improving patient care and treatment outcomes.
- Precision Transmission Components in Surgical Robots: Facilitates accurate and reliable movements in surgical robots, enabling complex procedures with high precision.
| 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.


