71913 ACD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71913 ACD/P4A Bearing Product Overview & Core Advantages
The 71913 ACD/P4A is a single-row angular contact ball bearing designed for high-precision applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, it excels in supporting combined loads, primarily handling significant axial loads in one direction alongside radial loads. Its compact cross-section, with a 65 mm bore and 13 mm width, makes it ideal for space-constrained, high-speed spindles. The phenolic cage and optimized 25° contact angle contribute to its superior high-speed performance and operational stability, establishing it as a premier choice for precision machinery.
71913 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71913 | Basic bearing series and size designation (65mm bore, 90mm OD, 13mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a high internal design and load capacity. |
| P4A | Indicates a P4 (ABEC-7) tolerance class with specific running accuracy requirements. |
71913 ACD/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: Manufactured to P4 precision tolerances with a phenolic resin cage, this bearing ensures minimal vibration and exceptional running accuracy, which is critical for maintaining positional stability in high-speed applications.
Optimized Load Capacity: The 25° contact angle is engineered to support high one-direction axial loads and combined (radial and axial) loads efficiently, making it suitable for applications with significant thrust forces.
Superior High-Speed Performance: The lightweight and robust phenolic cage, combined with a high-grade chrome steel construction, allows for a limiting speed of 20,000 rpm, reducing centrifugal forces and operational temperatures.
Pre-Lubricated for Immediate Operation: The bearing is supplied lubricated, ensuring it is ready for immediate installation and initial operation, reducing setup time and complexity.
71913 ACD/P4A Bearing Typical Application Areas
The 71913 ACD/P4A is ideally suited for high-performance machinery where precision and speed are paramount. Key application areas include:
- Machine Tool Spindles (e.g., CNC milling and grinding spindles)
- High-Frequency Motors
- Precision Robotics and Automation Equipment
- Dental and Medical Handpiece Drives
