71911 FEGA/HCP4AL
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71911 FEGA/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
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/HCP4AL Bearing Product Overview & Core Advantages
The 71911 FEGA/HCP4AL is a single-row angular contact ball bearing engineered for ultra-high precision applications. Positioned in the P4A tolerance class, it delivers exceptional running accuracy and dimensional stability. Its core advantage lies in its ability to support combined loads (radial and axial) efficiently, facilitated by an 18° contact angle. The use of ceramic balls and a phenolic cage enables superior high-speed performance and reduced rotational inertia. This bearing is universally matchable (SU), allowing for precise preload setting when mounted in pairs, making it ideal for applications demanding extreme rigidity and precision.
71911 FEGA/HCP4AL Bearing Model Code Explained, Specifications & Naming Convention
The model number 71911 FEGA/HCP4AL is decoded as follows:
- 71911: Basic bearing series, indicating a light series, single-row angular contact ball bearing with a 55mm bore and 80mm outside diameter.
- F: Indicates a specific internal design, often related to the contact angle and internal clearance optimized for high-speed operation.
- E: Signifies a high-grade phenolic resin cage, which is lightweight and ideal for high-speed applications.
- GA: Denotes a specific universal matchable (SU) pairing designation. Two bearings with this suffix can be mounted together to achieve a specific preload.
- HC: Indicates the use of hybrid ceramic balls (steel rings with silicon nitride balls), offering higher speed capability and longer service life.
- P4A: Defines the tolerance class. P4A is a super-precision grade with extremely tight tolerances on bore, outside diameter, and width for superior running accuracy.
- AL: Specifies the preload level. "AL" stands for Extra Light (A) preload, which is suitable for very high-speed applications requiring minimal friction and heat generation.
71911 FEGA/HCP4AL Bearing Structural Features & Performance Benefits
- Ultra-High Precision & Rigidity: Manufactured to P4A super-precision standards with tight dimensional tolerances, this bearing ensures minimal runout and vibration. The single-row design with an 18° contact angle provides excellent rigidity for precise shaft positioning.
- Superior High-Speed Capability: The combination of a lightweight phenolic cage and hybrid ceramic balls significantly reduces centrifugal forces, enabling a high limiting speed of 34,000 rpm. Ceramic balls also offer lower thermal expansion and better lubrication retention.
- Optimized Load Capacity: The bearing is designed to handle combined radial and axial loads simultaneously. Its dynamic and static load ratings ensure reliable performance under demanding conditions.
- Universal Matchability: As a Universal Matchable (SU) bearing, it can be paired with another identical bearing to form a precise duplex set, allowing engineers to achieve the exact preload required for maximum system stiffness and accuracy.
- Open Design with Factory Lubrication: The open seal type allows for optimal lubrication flow and heat dissipation. It comes pre-lubricated from the factory, ready for installation and initial operation.
71911 FEGA/HCP4AL Bearing Typical Application Areas
This high-precision angular contact ball bearingextreme accuracy, high speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense: Gyroscopes, radar systems, and navigation equipment.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
