71817 ACD/P4DGC
71800 Series Super Precision Angular Contact Ball Bearings
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71817 ACD/P4DGC Bearing Product Overview & Core Advantages
The 71817 ACD/P4DGC is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Operating under the P4 tolerance class, this bearing is engineered to handle combined loads efficiently, supporting significant radial and axial forces simultaneously. Its universal matchable (SU) design allows two bearings to be paired in a back-to-back or face-to-face arrangement, providing superior system stability. With a moderate preload (Class C) and a 25° contact angle, it delivers high rigidity and is optimized for high-speed operation up to 28,000 rpm, making it an ideal choice for high-performance machinery.
71817 ACD/P4DGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71817 | Basic bearing series and size designation. |
| AC | Angular Contact design, optimized for combined loads. |
| D | High Contact Angle (25°), providing high axial load capacity. |
| P4 | High precision tolerance class, ensuring minimal runout and superior running accuracy. |
| DG | Universal Matchable (SU) designation, indicating the bearing is supplied as one of a pair for universal mounting. |
| C | Moderate Preload (Class C), enhancing system rigidity and reducing deflection under load. |
71817 ACD/P4DGC Bearing Structural Features & Performance Benefits
The performance of the 71817 ACD/P4DGC is derived from its advanced construction. The phenolic cage contributes to lower friction and is ideal for high-speed applications, allowing the bearing to achieve its maximum limiting speed. The open seal type facilitates optimal lubrication flow and heat dissipation. Manufactured from chrome steel for both rings and balls, the bearing ensures high durability and long service life. The 25° contact angle is key to its excellent axial load carrying capacity, while the universal matching capability allows for easy configuration into pre-loaded pairs, significantly increasing the overall rigidity and stability of the spindle or assembly. Its P4 precision guarantees smooth, quiet, and vibration-free operation.
71817 ACD/P4DGC Bearing Typical Application Areas
This high-precision, high-speed bearing is specifically suited for demanding industrial sectors, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- Precision Gearboxes: In applications where low noise and high positional accuracy are critical.
- High-Frequency Motors and Spindles: Used in PCB drilling, dental handpieces, and other small, high-RPM machinery.
- Robotic Arms and Automation Systems: Providing precise and reliable motion control in joints and rotary axes.
