71911 ACE/HCP4AL
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71911 ACE/HCP4AL
Basic Information
System of measurement
Metric
Weight
0.14 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.004mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3330 lbf
Radial static load rating
2250 lbf
Limiting speed
39 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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Product Overview and Core Advantages
The 71911 ACE/HCP4AL is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This single bearing features a 25° contact angle and is supplied with a preload, delivering superior running accuracy and high rigidity. Its construction with a phenolic cage and ceramic balls enables outstanding high-speed performance, making it ideal for machine tool spindles and other precision machinery where reliability under combined loads is critical.
71911 ACE/HCP4AL Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACE | Indicates a 25° contact angle and specific internal design optimized for high-speed operation. |
| HC | Refers to the Hybrid Ceramic construction, featuring ceramic balls for reduced friction and higher limiting speeds. |
| P4A | Denotes a high-precision tolerance class (P4A), ensuring extremely tight dimensional and running accuracy. |
Structural Features and Performance Benefits
- High Rigidity and Running Accuracy: The preloaded design and 25° contact angle provide exceptional system stiffness and minimize deflection under load, ensuring precise rotational performance.
- Superior High-Speed Capability: The combination of a lightweight phenolic cage and low-density ceramic balls significantly reduces centrifugal forces, enabling a high limiting speed of 39,000 rpm.
- Enhanced Durability and Temperature Resistance: Ceramic balls offer superior wear resistance and can operate effectively within a wide temperature range from -30°C to 110°C.
- Optimized for Precision Applications: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for maintaining high-quality surface finishes and positioning accuracy.
71911 ACE/HCP4AL Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and milling spindles.
- Precision Instrumentation: High-speed measuring devices and coordinate measuring machines (CMM).
- Advanced Robotics: Joints and actuators requiring high precision and rapid response.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other critical high-speed components.
