71820 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
71820 ACD/P4 Bearing Product Overview & Core Advantages
The 71820 ACD/P4 is a single-row angular contact ball bearing engineered for applications demanding high precision and superior performance under combined loads. Its defining characteristic is the 25° contact angle, which enables it to efficiently support substantial axial loads in one direction while simultaneously handling radial loads. Manufactured to P4 (ABEC-7) tolerance class, this bearing guarantees exceptional running accuracy and rotational stability. The combination of a phenolic resin cage and pre-applied lubrication facilitates high-speed operation up to 13,000 rpm, making it an ideal, compact solution for high-reliability machinery.
71820 ACD/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Interpretation | Technical Significance |
|---|---|---|
| 71820 | Basic Designation | Specifies the bearing series and size: 100 mm bore, 125 mm OD, 13 mm width. |
| AC | Angular Contact | Designed with a contact angle to support combined (radial and axial) loads. |
| D | High Contact Angle | Specifically denotes a 25° contact angle for high axial load capacity. |
| P4 | Tolerance Class | Corresponds to ABEC-7, indicating ultra-high precision for smooth, low-vibration operation. |
71820 ACD/P4 Bearing Structural Features & Performance Benefits
- Optimized Load Capacity: The 25° contact angle and robust construction provide excellent resistance to combined loads, making it suitable for applications with significant axial thrust.
- High-Speed Performance: The lightweight phenolic resin cage ensures stability and low inertial mass, which is critical for achieving the high limiting speed of 13,000 rpm.
- Precision & Rigidity: Manufactured to P4 precision class with tight dimensional tolerances, this bearing offers high running accuracy and system rigidity, minimizing deflection under load.
- Ready-to-Install: The bearing comes pre-lubricated, simplifying installation and ensuring immediate, optimal performance from startup.
71820 ACD/P4 Bearing Typical Application Areas
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- High-Speed Pumps and Compressors
- Aerospace Control Systems
