9446M78G01 is a precision aerospace component compliant with AS9100D quality standards and FAA/EASA aviation regulations, dedicated to aircraft engine bearing systems.It acts as a high-performance rolling bearing assembly, a core load-bearing component for MRO replacement. It supports high-speed rotating parts of the engine core, bears radial and axial loads stably during all flight phases, minimizes rotational friction to reduce energy loss, and prevents shaft jitter or seizure caused by poor support, ensuring smooth operation of rotors and transmission components.Made of aviation-grade high-strength bearing steel with heat-resistant lubrication, it resists high temperature, heavy load and severe vibration, working stably at -55℃ to 320℃. Weighing 0.25kg, it features high precision, wear resistance and long service life, with pre-greased and sealed design for easy installation. It is a critical component to guarantee engine rotating system stability and overall operational safety and reliability.