71912 FEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71912 FEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.16 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
85 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
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3668 lbf
Radial static load rating
2610 lbf
Limiting speed
31 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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71912 FEGA/HCP4A Bearing Product Overview & Core Advantages
The 71912 FEGA/HCP4A is a single-row angular contact ball bearing engineered for ultra-high precision applications demanding exceptional rotational accuracy and rigidity. Positioned in the P4A super-precision tolerance class, it delivers superior running accuracy and dimensional stability. Its ceramic ball construction enables outstanding high-speed performance and reduced heat generation, while the universal matching (SU) designation allows for precise preload control when mounted in pairs. This bearing is pre-lubricated for immediate use and is designed to handle combined loads with high reliability.
71912 FEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing designation, indicating a high-precision angular contact bearing series with a 60 mm bore. |
| FE | Indicates a phenolic resin (phenolic) cage, which is lightweight and ideal for high-speed operation. |
| GA | Specifies a contact angle of 18°, optimized for carrying significant axial loads in one direction. |
| HC | Denotes the use of hybrid ceramic balls (silicon nitride), offering high-speed capability, electrical insulation, and longer service life. |
| P4A | The tolerance class, signifying super-precision levels with very tight dimensional and running accuracy tolerances. |
71912 FEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, friction, and heat generation. This directly enables a higher limiting speed (31,000 rpm) and increased operational lifespan, especially in demanding environments.
- High Rigidity & Load Capacity: The 18° contact angle and robust single-row design provide excellent stiffness, making it capable of handling combined radial and axial loads simultaneously with high precision.
- Phenolic Resin Cage: This lightweight cage material offers superior strength and guidance at high speeds, contributing to smooth operation and reduced vibration.
- Super-Precision P4A Tolerance: Manufactured to the strictest P4A tolerance class, this bearing ensures minimal runout and exceptional dimensional stability, which is critical for applications requiring the highest levels of accuracy.
- Universal Matchable (SU): As a universal matchable bearing, it can be paired with another identical bearing in a back-to-back or face-to-face arrangement to achieve a defined preload, simplifying installation and optimizing system performance.
71912 FEGA/HCP4A Bearing Typical Application Areas
The 71912 FEGA/HCP4A is ideally suited for high-performance machinery where precision, speed, and reliability are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotic Drives: Joints and actuators requiring high rigidity and accuracy.
- High-Frequency Motors and Spindles: Used in PCB drilling, dental handpieces, and small tool spindles.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments, and radar equipment.
- Medical Equipment: Centrifuges and high-speed dental drills.
