71911 FEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71911 FEGA/HCP4A
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
18 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3442 lbf
Radial static load rating
2340 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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71911 FEGA/HCP4A Bearing Product Overview & Core Advantages
The 71911 FEGA/HCP4A is a single-row angular contact ball bearing engineered for ultra-high precision and exceptional performance in demanding applications. Positioned in the P4A super-precision tolerance class, this bearing delivers extreme dimensional accuracy and running consistency. Its ceramic ball construction and phenolic cage enable superior high-speed capabilities and thermal stability. Designed to accommodate primarily axial loads in one direction and combined loads, it offers high rigidity and minimal rotational runout, making it ideal for applications requiring the highest levels of accuracy and reliability.
71911 FEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| FE | Filled with a special high-performance lubricant. | Ensures optimal lubrication for high-speed operation and extended service life. |
| GA | Universal Matchable bearing set with an Extra Light (A) preload. | Allows for precise axial play adjustment when mounted with a second, matched bearing, ensuring high system rigidity with minimal friction. |
| HC | Hybrid Ceramic construction (steel rings with ceramic balls). | Provides higher speed capability, reduced weight, electrical insulation, and superior performance under marginal lubrication. |
| P4A | Super Precision Tolerance Class. | Guarantees extremely tight dimensional and running accuracy for applications with the most stringent requirements for rotational precision. |
71911 FEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, enabling a higher limiting speed (34,000 rpm). This design also offers excellent electrical insulation and superior performance in high-temperature or poorly lubricated environments.
- Phenolic Resin Cage: The lightweight and robust phenolic cage provides excellent dimensional stability and low friction at high speeds, contributing to smooth operation and reduced wear.
- High Rigidity & Precision: Manufactured to P4A tolerance class with an 18° contact angle, this bearing provides high axial rigidity and exceptional running accuracy, minimizing deflection and vibration under load.
- Optimized for Matched Sets: As a Universal Matchable (SU) bearing, it is designed to be paired with an identical bearing to form a duplex set. This configuration allows for precise preload control to achieve optimal system stiffness and performance.
- Pre-lubricated: The bearing is factory-filled with a special lubricant suitable for its specified temperature range (-30°C to 110°C), ensuring immediate readiness for service and reliable operation.
71911 FEGA/HCP4A Bearing Typical Application Areas
The 71911 FEGA/HCP4A is specified for high-performance machinery where super-precision, high speed, and high rigidity are paramount. Key industries and equipment include:
- High-Speed Machine Tool Spindles (e.g., for milling, grinding, and drilling)
- Precision Robotics and Automation Arms
- High-Frequency CNC Machining Centers
- Aerospace & Defense Instrumentation and Guidance Systems
- Medical Equipment such as high-speed dental handpieces and surgical drills
