The Torq-Tender is designed for operation at speeds up to 1,800 rpm; however, the Torq-Tender performance may be affected by, and sensitive to, inertia in the system at higher speeds.  Contact the factory for higher speed applications.  It is also recommended to include an actuating pin or actuating disc at higher speeds for immediate shut down of the motor to prevent excessive overloads of the Torq-Tender.