71911 CB/P4A 55*80*13 mm Super Precision High Capacity Single Row
Angular Contact Ball Bearing
Super-precision, high-speed B design, single row angular contact
ball bearing
The 71911 CB/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 CB/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 | 0.18 kg |
| Matched Arrangement | No |
| Universal Matching Bearing | No |
| Preload | Not applicable |
| Load and Speed | Dynamic Radial Load | 9950 N |
| Static Radial Load | 8150 N |
| Reference Speed For Grease (r/min) | 22,000 rpm |
| Limiting Speed For Oil(r/min) | 34,000 rpm |
What's the Performance Features of 71911 CB/P4A Bearing?
The 71911 CB/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 CB/P4A Bearing?
The 71911 CB/P4A bearing is a high-precision angular contact ball bearing, ideal
for high-speed and demanding applications. Here are its key uses:
1. Machine Tools
- High-Speed Spindles: Used in machining titanium and composites at 20,000–40,000 rpm.
Optimizes cutting forces and reduces heat deformation.
- Grinder Spindles: Ensures ultra-smooth surface finishes (Ra ≤0.05μm).
2. Semiconductor Manufacturing
- Wafer Stages: Provides precise motion control for lithography machines.
- Probe Stations: Keeps stable electrical contact during high-speed wafer testing.
3. Aerospace
- Fuel Valves: Handles high speeds (up to 25,000 rpm) and resists fuel
corrosion.
- Satellite Reaction Wheels: Ensures smooth operation in vacuum environments for satellite
positioning.
4. Medical & Scientific Equipment
- Proton Therapy: Accurately directs beams with minimal error (≤0.1mm).
- Centrifuges: Operates at 100,000+ rpm with low vibration for sample
protection.
5. Robotics
- Robotic Joints: Lightweight design improves flexibility and accuracy.
- Delta Robots: Achieves high repeatability (±5μm) at fast speeds.
| 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!
