7218 ACDGC/P4A

• 7218: Basic designation indicating a 90 mm bore, 160 mm OD, 30 mm width bearing.
• AC: Angular Contact design, optimized for combined loads.
• D: Signifies a high ball count and optimized internal geometry for increased load capacity.
• GC: Indicates a specific preload class—in this case, Moderate (Class C), providing an optimal balance between rigidity and operating temperature.
• P4A: Denotes an ultra-precision tolerance class superior to ABEC 7, ensuring extremely tight dimensional and running accuracy for the most demanding applications.

High Rigidity and Load Capacity: The angular contact design with a 25° contact angle and Moderate preload provides excellent resistance to deflection under load, enhancing system stability. With a dynamic load rating of 27,225 lbf and static load rating of 23,850 lbf, it reliably sustains heavy combined loads.

High-Speed Performance: The lightweight, durable phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 17,000 rpm. This makes the bearing suitable for high-speed applications such as machine tool spindles.

Precision Engineering: Manufactured to P4A tolerance standards with tight bore, OD, and width tolerances, this bearing ensures precise shaft positioning and smooth, vibration-free operation.

Universal Matching Capability (SU): Designed as a Universal Matchable bearing, it can be mounted in sets (typically in a 3-bearing arrangement as specified) to achieve specific preload or rigidity requirements without selective sorting.

• Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring precision and rigidity.
• Precision Grinding Equipment: Applications demanding minimal runout and high rotational accuracy.
• High-Speed Motors and Pumps: Where reliable performance under combined radial and axial loads is essential.
• Industrial Robotics: Precision joints and arm assemblies requiring high stiffness and speed.