71803 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
71803 ACD/P4 Bearing Product Overview & Core Advantages
The 71803 ACD/P4 is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Engineered to the P4 (ABEC-7) tolerance class, this bearing is optimized to handle combined loads—significant radial loads and thrust loads in one direction. Its compact design, with a 5 mm width, makes it ideal for space-constrained, high-speed spindles and precision instruments where high rigidity and minimal runout are critical. The phenolic resin cage and preloaded configuration contribute to smooth, quiet operation at elevated speeds.
71803 ACD/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71803 | Basic bearing series and size designation (17mm bore, 26mm OD, 5mm width). |
| AC | Angular Contact design with a 25° contact angle for optimal thrust load capacity. |
| D | Signifies a duplex (preloaded) arrangement, providing high system stiffness and precise shaft positioning. |
| P4 | Indicates the ultra-precision tolerance class (equivalent to ABEC-7), ensuring minimal dimensional and running inaccuracies. |
71803 ACD/P4 Bearing Structural Features & Performance Benefits
High Rigidity & Axial Load Capacity: The angular contact geometry with a 25° contact angle and preloaded duplex arrangement provides exceptional resistance to deflection, making it ideal for applications requiring high axial and radial stiffness.
High-Speed Performance: The lightweight phenolic resin cage ensures stability and low friction at the limiting speed of 75,000 rpm, reducing centrifugal forces and heat generation.
Precision Engineering: Manufactured to P4 precision class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees superior running accuracy and minimal vibration.
Optimized Internal Geometry: With 18 precision-ground chrome steel balls, the bearing offers a high dynamic load rating of 497 lbf and reliable performance under demanding conditions.
71803 ACD/P4 Bearing Typical Application Areas
The 71803 ACD/P4 is engineered for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and drilling spindles.
- Precision Instruments: Optical encoders, measuring devices, and laboratory equipment.
- High-Frequency Motors: Spindles for PCB drilling and small precision motors.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments, and control actuators.
