71818 ACDGA/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71818 ACDGA/P4 Bearing Product Overview & Core Advantages
The 71818 ACDGA/P4 is a single-row angular contact ball bearing designed for applications requiring high precision and superior performance under combined loads. Manufactured to P4 tolerance class, this bearing delivers exceptional running accuracy and rotational stability. Its key advantage lies in its ability to efficiently support combined radial and axial loads in one direction, making it ideal for high-speed spindles and precision machinery. The Universal Matchable (SU) designation allows for easy pairing with a second, identical bearing to create a preloaded set, enhancing system rigidity and performance.
71818 ACDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71818 | Basic bearing series and size designation (90mm bore, 115mm OD) |
| AC | Angular Contact design with a 25° contact angle |
| DGA | Designates specific internal geometry and Extra light (Class A) preload |
| P4 | Indicates high precision tolerance class for superior running accuracy |
71818 ACDGA/P4 Bearing Structural Features & Performance Benefits
High-Precision Construction: Manufactured to P4 tolerance standards with tight dimensional control on bore, outside diameter, and width, ensuring minimal runout and vibration for precision applications.
Optimized Load Capacity: The 25° contact angle and robust chrome steel construction enable high radial dynamic load rating (4568 lbf) and static load rating (5625 lbf), effectively handling combined loads.
High-Speed Capability: The lightweight phenolic cage and optimized internal design contribute to a high limiting speed of 15,000 rpm, suitable for demanding spindle applications.
Universal Matching (SU): This bearing is designed as a Universal Matchable (SU) component, allowing it to be paired with another identical bearing to form a preloaded set, significantly increasing system rigidity and operational accuracy.
71818 ACDGA/P4 Bearing Typical Application Areas
The 71818 ACDGA/P4 is engineered for high-performance applications where precision and speed are critical. Its primary uses include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Applications requiring high rotational accuracy and rigidity.
- High-Frequency Motors: Spindles for CNC machinery and robotics.
- Aerospace Components: Guidance systems and auxiliary power units.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
