The FMD Series torque setting is preset at the factory. When the drive system torque exceeds the setting, the torque limiter will slip while continuing to transmit torque equal to the setting. This is possible because the static and dynamic coefficient of friction of the disc pack are almost identical due to proprietary design.
The FMD series torque limiter is designed to operate at motor speed. In most drive systems the prime mover represents approximately 90-95% of the total inertia. The FMD series will generally provide excellent inertial shockload protection when located at the prime mover.