71913 ACE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71913 ACE/P4A Bearing Product Overview & Core Advantages
The 71913 ACE/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, it is optimized to handle combined loads, supporting significant radial and axial loads simultaneously. Its compact cross-section, with a 65 mm bore and 90 mm outside diameter, makes it ideal for space-constrained, high-performance assemblies. The bearing comes preloaded and lubricated from the factory, ensuring immediate operational readiness and contributing to its high-speed capability and long service life.
71913 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACE | Indicates a 25° contact angle and specific internal design optimized for high-speed operation and high rigidity. |
| P4A | Denotes the tolerance class P4 (ABEC-7), signifying very high dimensional and running accuracy. The 'A' may indicate specific accuracy requirements for the bearing's width and perpendicularity. |
71913 ACE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row design, combined with a 25° contact angle and P4 precision, provides excellent operational stability and resistance to deflection under load, which is critical for machine tool spindles and other high-precision equipment.
- Superior Load Capacity: The angular contact design is inherently capable of handling combined radial and axial loads efficiently. With a dynamic load rating of 3510 lbf and a static load rating of 2610 lbf, it offers reliable performance in demanding applications.
- Optimized High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces and ensures stable operation at the high limiting speed of 28,000 rpm. The phenolic material also offers excellent performance under lubrication and at high speeds.
- Ready-to-Install: The bearing is supplied preloaded and lubricated, simplifying installation and ensuring immediate, optimal performance without the need for initial setup or lubrication.
71913 ACE/P4A Bearing Typical Application Areas
The 71913 ACE/P4A is a critical component in high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Where extreme rotational accuracy is required.
- High-Frequency Motors and Spindles: Used in PCB drilling and other high-RPM applications.
- Industrial Pumps and Compressors: For handling axial and radial loads in fluid movement systems.
