71813 ACD/P4
71800 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71813 ACD/P4 Bearing Product Overview & Core Advantages
The 71813 ACD/P4 is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Designed to accommodate combined loads (radial and axial loads in one direction), this bearing features a 25° contact angle and P4 (ABEC-7) precision tolerance, making it ideal for machine tool spindles, precision instruments, and other high-speed equipment where minimal runout and vibration are critical. Its compact design with a 65 mm bore, 85 mm outside diameter, and 10 mm width provides a space-saving solution without compromising performance.
71813 ACD/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71813 | Basic bearing designation indicating metric dimensions (65mm bore, 85mm OD, 10mm width) |
| AC | Angular Contact design with 25° contact angle for combined load capacity |
| D | High preload condition for enhanced rigidity and precise positioning |
| P4 | Precision class equivalent to ABEC-7, ensuring ultra-precise running accuracy |
71813 ACD/P4 Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The angular contact design with 25° contact angle and preload configuration delivers exceptional stiffness, minimizing deflection under load and maintaining precise shaft positioning. The P4 tolerance class ensures consistent high-precision performance in demanding applications.
Optimized Load Capacity: Engineered to handle combined radial and axial loads simultaneously, with a radial dynamic load rating of 2858 lbf and radial static load rating of 3150 lbf. The optimized internal geometry distributes stress evenly across the 29 chrome steel balls for extended service life.
High-Speed Performance: The phenolic resin cage provides excellent strength-to-weight ratio and smooth operation at high speeds, supporting a limiting speed of 20,000 rpm. The open design allows for efficient lubrication management in high-speed applications.
Premium Material Construction: Manufactured from chrome steel for both rings and balls, providing superior wear resistance and dimensional stability across the operating temperature range of -30°C to 110°C.
71813 ACD/P4 Bearing Typical Application Areas
- Machine tool spindles and high-precision machining centers
- High-speed spindles for grinding, milling, and drilling applications
- Precision instruments and measuring equipment
- Robotics and automation systems requiring high positional accuracy
- Medical equipment spindles and precision rotary systems
- Aerospace control systems and auxiliary drives
