71919 ACD/P4ATBTB

• 71919: Basic series and size designation (95mm bore, 130mm OD).
• ACD: Angular Contact design with a 25° contact angle.
• P4A: Denotes a high-precision tolerance class (exceeding ABEC 7 / ISO P4).
• T: Indicates a triplex set (three bearings).
• BTB: Specifies the Back-to-Back mounting arrangement.
• Light Preload / Class B: The bearings are supplied with a pre-determined light preload to eliminate internal clearance, enhancing stiffness and rotational accuracy.

Unmatched Rigidity and Stability: The triplex back-to-back (TBT) configuration creates a highly rigid bearing system that effectively resists moment loads, making it ideal for applications where shaft deflection must be minimized.

High-Speed Performance: The phenolic resin cage is lightweight and ensures smooth operation at high speeds, contributing to the bearing's impressive limiting speed of 16,000 rpm. The optimized internal geometry further supports stable high-speed rotation.

Superior Load Capacity: With a 25° contact angle and a robust construction using chrome steel for both rings and balls, this bearing set offers high dynamic and static load ratings (22,388 lbf and 35,100 lbf respectively) for handling significant combined radial and axial loads.

Precision Engineering: The P4A tolerance class guarantees extremely tight dimensional and running accuracy, which is critical for applications requiring minimal runout and vibration.

This high-precision bearing set is typically specified for advanced machinery where ultimate accuracy, speed, and rigidity are non-negotiable. Key applications include:

• High-Frequency Machine Tool Spindles
• Precision Grinding Spindles
• High-Speed Robotic Drives
• Advanced Medical and Dental Equipment
• Aerospace Positioning Systems