71826 ACD/P4DGB
71800 Series Super Precision Angular Contact Ball Bearings
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71826 ACD/P4DGB Bearing Product Overview & Core Advantages
The 71826 ACD/P4DGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high rigidity. As a universally matchable (SU) bearing supplied in a pre-loaded pair, it is engineered to accommodate combined radial and axial loads simultaneously. Its P4 tolerance class ensures ultra-precise running, making it ideal for high-speed spindles and other high-precision machinery. The phenolic cage and optimized contact angle of 25° contribute to superior high-speed performance and operational stability.
71826 ACD/P4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71826 | Basic bearing designation indicating the series and size. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a universally matchable (SU) bearing, allowing any two bearings to be paired without selective matching. |
| P4 | Indicates a high-precision tolerance class for superior running accuracy. |
| DGB | Specifies a Light preload (Class B) applied to the matched bearing set. |
71826 ACD/P4DGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design and universal matching create a highly rigid bearing arrangement capable of withstanding significant combined loads from multiple directions.
- Superior High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, while the optimized geometry and 25° contact angle enable a high limiting speed of 11,000 rpm.
- Precision Engineering: Manufactured to P4 tolerance class with tight dimensional control on the bore diameter and outside diameter, ensuring minimal runout and vibration for smooth, accurate operation.
- Optimized for Preloading: Supplied as a pre-loaded pair (DGB), this bearing eliminates internal clearance, increases system stiffness, and improves positional accuracy without requiring complex adjustment during installation.
71826 ACD/P4DGB Bearing Typical Application Areas
The 71826 ACD/P4DGB is ideally suited for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Articulated arms and high-accuracy positioning systems.
- Medical Equipment: Dental handpieces and imaging device rotors.
- Aerospace Systems: Gyroscopes, navigation instruments, and auxiliary power units.
