7218 ACD/P4ATBTB

• 7218: Basic designation indicating a metric series bearing with a 90 mm bore and 160 mm outside diameter.
• ACD: Signifies a 25° contact angle, optimized for supporting high axial loads.
• P4A: Denotes an extremely high tolerance class, exceeding ABEC 7/ISO P4 standards, for superior running accuracy and dimensional precision.
• TBT: Indicates a Triplex Back-to-Back matched set of three bearings, providing maximum rigidity and moment load capacity.
• Open: The bearing is supplied without seals or shields, allowing for customized lubrication systems in high-speed applications.
• Lubricated: The bearing is pre-lubricated from the factory for immediate operation.

Unmatched Rigidity and Stability: The triplex back-to-back arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, ensuring precise rotational alignment under heavy combined loads.

High Load Capacity: The 25° contact angle and robust construction, featuring chrome steel rings and balls, provide excellent dynamic (59,625 lbf) and static (72,000 lbf) load ratings.

Optimized High-Speed Performance: The phenolic cage offers low weight and excellent performance at high rotational speeds, contributing to the bearing's impressive limiting speed of 17,000 rpm.

Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on bore, outside diameter, and width, this bearing guarantees smooth, quiet, and vibration-free operation.

This bearing is specifically engineered for high-performance applications in:

• Machine Tool Spindles: High-speed milling, grinding, and turning centers.
• Precision Gearboxes: Applications requiring high torsional stiffness.
• High-Frequency Motors and Spindles: Where minimal runout and high rotational accuracy are paramount.
• Industrial Pumps and Compressors: For robust and reliable shaft support.