71913 CD/P4ADFC
71900 Series Super Precision Angular Contact Ball Bearings
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71913 CD/P4ADFC Bearing Product Overview & Core Advantages
The 71913 CD/P4ADFC is a duplex face-to-face (DF) matched pair of precision angular contact ball bearings, designed for applications requiring high rigidity and moderate preload. This P4A tolerance class bearing set is engineered to handle combined loads (radial and axial) simultaneously, making it ideal for high-precision spindles and machinery where exceptional running accuracy and dimensional stability are critical. The matched set ensures optimized performance and simplified installation.
71913 CD/P4ADFC Bearing Model Code Explained, Specifications & Naming Convention
- 71913: Basic bearing designation, indicating a light series, 65mm bore, 90mm OD, 26mm width angular contact ball bearing.
- C: Denotes a 15° contact angle, optimized for high-speed operation and moderate axial load capacity.
- D: Indicates the bearing is part of a duplex pair.
- P4A: Specifies a high precision tolerance class exceeding ABEC 7 (ISO Class 4), ensuring extremely tight dimensional and running accuracy.
- DF: Stands for Duplex Face-to-Face arrangement. This configuration increases system rigidity and is suitable for applications where moment loads are present.
- C: Indicates a moderate preload (Class C), which reduces axial and radial play for improved shaft positioning accuracy without excessive friction or heat generation.
71913 CD/P4ADFC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex face-to-face (DF) arrangement creates a highly rigid bearing system capable of withstanding combined radial and axial loads as well as moment loads. The moderate preload (Class C) eliminates internal clearance, enhancing shaft stability and rotational accuracy under load.
High-Speed Performance: The 15° contact angle and lightweight phenolic resin cage contribute to lower friction and lower centrifugal forces, enabling the bearing to achieve a high limiting speed of 31,000 rpm. This makes it suitable for demanding high-speed applications.
Precision & Durability: Manufactured to P4A super-precision tolerances from high-grade chrome steel, this bearing guarantees exceptional running smoothness, low noise, and long service life in precision machinery.
Ready-to-Use: The bearings are supplied as a lubricated and matched set, ensuring optimal performance straight from the package and simplifying the assembly process.
71913 CD/P4ADFC Bearing Typical Application Areas
The 71913 CD/P4ADFC is ideally suited for high-performance applications where precision and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for electric motors operating at very high rotational speeds.
- Robotics: High-accuracy joints and rotary actuators.
