71828 ACD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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71828 ACD/P4DGA Bearing Product Overview & Core Advantages
The 71828 ACD/P4DGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. Engineered to a P4 tolerance class, it offers superior running precision. Its 25° contact angle and Universal Matchable (SU) design enable it to accommodate combined loads (radial and axial) efficiently. The bearing comes pre-lubricated and is characterized by its high limiting speed and extra light preload (Class A), making it ideal for high-speed, high-precision spindles and machinery.
71828 ACD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance & Advantage |
|---|---|---|
| ACD | Angular Contact, 25° Contact Angle | Optimized for handling significant axial loads in one direction along with radial loads. |
| P4 | Tolerance Class P4 | Denotes very high precision with tight dimensional and running accuracy tolerances for demanding applications. |
| DGA | Universal Matchable (SU), 2-Bearing Set | Bearing is supplied as one of a universally matchable pair (SU). When mounted with a similar bearing, they can be arranged to handle bidirectional axial loads or achieve a specific preload. |
71828 ACD/P4DGA Bearing Structural Features & Performance Benefits
High Precision and Rigidity: Manufactured to P4 tolerance class with a phenolic cage, this bearing ensures minimal runout and vibration, providing high rotational accuracy and system rigidity. The extra light preload (Class A) further enhances positional stability.
Superior Load Capacity: The 25° contact angle and robust construction, featuring 35 high-grade chrome steel balls, provide excellent radial dynamic load rating of 15,502 lbf and a high radial static load rating of 26,550 lbf, enabling reliable performance under combined loads.
Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the open design and effective lubrication contribute to a high limiting speed of 6,300 rpm, making it suitable for high-speed applications.
Universal Matching Capability: The Universal Matchable (SU) feature allows any two bearings to be mounted together in a back-to-back, face-to-face, or tandem arrangement without selective matching, simplifying installation and providing flexibility in managing axial loads and preload.
71828 ACD/P4DGA Bearing Typical Application Areas
The 71828 ACD/P4DGA is ideally suited for high-performance machinery where precision and speed are critical. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: Used in PCB drilling, engraving, and high-frequency motor spindles.
- Industrial Pumps and Compressors: For applications requiring reliable operation under combined loads.
- Robotics and Automation: High-accuracy rotary joints and axes.
