71909 FEGA/HCP4AL
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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71909 FEGA/HCP4AL Bearing Product Overview & Core Advantages
The 71909 FEGA/HCP4AL is a single-row angular contact ball bearing engineered for ultra-high precision applications. Operating under the stringent P4A tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its core advantage lies in its ability to support high axial loads in one direction while accommodating radial loads, making it ideal for demanding, high-speed machinery. The combination of a ceramic ball material and phenolic cage enables superior performance at the specified limiting speed of 41,000 rpm, offering low friction, reduced heat generation, and extended service life.
71909 FEGA/HCP4AL Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71909 | Basic bearing designation, indicating a light series, single-row angular contact bearing with a 45mm bore. |
| FE | Steel machined window-type cage, guided by the land-riding outer ring. |
| GA | Indicates a specific internal design with a contact angle of 18° and Extra Light (Class A) preload. |
| HC | Hybrid Ceramic, signifying the use of ceramic balls for enhanced speed capability and durability. |
| P4A | The tolerance class, denoting very high precision for both bore and outside diameter tolerances. |
| L | The bearing is lubricated with a high-performance grease suitable for its operating temperature range. |
71909 FEGA/HCP4AL Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls significantly reduces centrifugal forces and friction, enabling the bearing to achieve its high limiting speed of 41,000 rpm. This results in lower operating temperatures and longer lubricant life.
- High-Precision P4A Tolerance: Manufactured to P4A tolerance class with tight bore and outside diameter tolerances, this bearing ensures minimal runout and superior system accuracy, which is critical for high-speed spindles.
- Optimized Load Capacity: The 18° contact angle and Extra Light preload are optimized for applications requiring high-speed operation with excellent axial load-carrying capacity and rigidity.
- Phenolic Cage for High-Speed Stability: The phenolic cage offers excellent strength-to-weight ratio and smooth operation at high rotational speeds, contributing to the bearing's overall dynamic performance and reliability.
71909 FEGA/HCP4AL Bearing Typical Application Areas
The 71909 FEGA/HCP4AL is designed for high-performance machinery where speed, precision, and reliability are paramount. Its typical applications include:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Motors
- Aerospace Auxiliary Power Units (APUs)
- Advanced Robotic Drives
