71818 ACD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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71818 ACD/P4DGA Bearing Product Overview & Core Advantages
The 71818 ACD/P4DGA is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Engineered to a P4 tolerance class, this bearing excels in handling combined loads—simultaneously supporting significant radial and axial loads. Its universal matchable (SU) design allows for flexible mounting arrangements in pairs to accommodate complex load scenarios. The bearing features a phenolic cage, optimized for high-speed operation, and comes pre-lubricated for immediate use, making it an ideal solution for high-reliability, precision machinery.
71818 ACD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71818 | Basic bearing series and size designation (90mm bore, 115mm OD, 26mm width). |
| ACD | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| P4 | Indicates a high-precision tolerance class, ensuring minimal dimensional runout for superior rotational accuracy. |
| DGA | Signifies a Universal Matchable (SU) bearing, designed to be paired in a back-to-back (DB) or face-to-face (DF) arrangement without the need for selective shimming. |
71818 ACD/P4DGA Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The angular contact design with a 25° contact angle provides robust support for combined radial and axial loads. The universal matching capability allows for the creation of pre-loaded bearing sets, significantly enhancing system stiffness.
Optimized High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 15,000 rpm. This makes the bearing suitable for demanding high-speed spindles.
Precision Engineering: Manufactured to P4 tolerance standards with tight dimensional control on the bore, outside diameter, and width, ensuring consistent, high-accuracy performance in precision assemblies.
Durable Construction: Components made from chrome steel for both rings and balls offer high hardness and wear resistance, ensuring a long service life under demanding operating conditions.
71818 ACD/P4DGA Bearing Typical Application Areas
The 71818 ACD/P4DGA is ideally suited for high-performance applications where precision and speed are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Articulated arms and high-accuracy positioning systems.
- High-Frequency Motors and Spindles: Applications requiring minimal runout and high rotational accuracy.
- Medical Equipment: Dental handpieces and imaging device rotors.
- Aerospace Actuation Systems: Control surface mechanisms and auxiliary power units.
