71806 ACD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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71806 ACD/P4DGA Bearing Product Overview & Core Advantages
The 71806 ACD/P4DGA is a super-precision angular contact ball bearing designed for applications demanding the highest levels of accuracy and performance. Its universal matchable (SU) design allows two bearings to be paired in a back-to-back (DB) or face-to-face (DF) arrangement, providing exceptional system rigidity. This bearing excels at handling combined loads (radial and axial) simultaneously, making it ideal for high-speed spindles and other precision machinery where high rigidity and running accuracy are paramount. The open design, combined with a phenolic cage, facilitates optimal lubrication and contributes to its impressive limiting speed.
71806 ACD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71806 | Basic bearing series and size designation. |
| AC | Angular Contact design with a 25° contact angle. |
| D | The bearing is supplied as one of a universally matchable (SU) pair. |
| P4 | Indicates a high-precision tolerance class (superior to ABEC 7). |
| DGA | Suffix combination indicating the bearing is lubricated and comes with an extra light preload (Class A). |
71806 ACD/P4DGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and universal matchability (SU) enable the creation of preloaded bearing sets. This configuration provides superior stiffness and the ability to handle significant combined radial and axial loads from both directions.
- Super-Precision Performance: Manufactured to a P4 tolerance class, this bearing ensures minimal runout and vibration, which is critical for achieving high rotational accuracy in demanding applications.
- Optimized High-Speed Capability: The lightweight phenolic cage reduces centrifugal forces, while the open seal design minimizes friction. This combination allows the bearing to achieve a high limiting speed of 100,500 rpm.
- Pre-Configured for Performance: The bearing is supplied lubricated and with a factory-set extra light preload (Class A). This eliminates the need for complex preload adjustment during installation, ensuring consistent, optimal performance from the start.
71806 ACD/P4DGA Bearing Typical Application Areas
The 71806 ACD/P4DGA is engineered for the most demanding precision applications, including:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Instrumentation: High-frequency spindles for PCB drilling and semiconductor manufacturing equipment.
- High-Speed Motors: Spindles for routers and other high-RPM industrial motors.
- Medical and Laboratory Equipment: Centrifuges and other devices requiring smooth, precise, and quiet operation.
