71909 CE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71909 CE/P4A Bearing Product Overview & Core Advantages
The 71909 CE/P4A is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and high-speed performance. As a P4 (ABEC-7) tolerance class bearing, it guarantees superior running accuracy and rotational stability. Its core advantage lies in its ability to support high combined loads, efficiently handling both radial and substantial axial loads in one direction, thanks to its optimized 15° contact angle. This design results in a compact, high-rigidity solution ideal for high-reliability and high-accuracy machinery.
71909 CE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 71909 | Basic bearing series and size designation (45mm bore, 68mm OD, 12mm width). |
| C | Designates a 15° contact angle, optimized for high-speed operation. |
| E | Indicates optimized internal geometry and reinforced structure for increased load capacity. |
| P4 | Specifies the high precision tolerance class (equivalent to ABEC-7). |
| A | Denotes that the bearing is supplied with a specific preload for enhanced rigidity and precise shaft positioning. |
71909 CE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row angular contact design, combined with a phenolic resin cage and P4 precision manufacturing, ensures minimal deflection and exceptional running accuracy under high-speed and high-load conditions.
- Superior Load Capacity: The 15° contact angle and reinforced internal design (E-suffix) enable the bearing to carry significant combined radial and axial loads simultaneously.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the precision-ground chrome steel balls and raceways contribute to a high limiting speed of 44,000 rpm.
- Pre-lubricated and Ready-to-Install: The bearing is supplied pre-lubricated, ensuring immediate operation and simplifying the installation process.
71909 CE/P4A Bearing Typical Application Areas
The 71909 CE/P4A is ideally suited for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles
- High-Frequency Motors and Spindles
- Precision Grinding Equipment
- Robotic Drives and Actuators
- Medical and Dental Handpieces
- Aerospace Instrumentation
