Train-America Model Trains

Torquemasters are slow motion stall motors engineered to stall when the tension of the point rail against the stock rail exceeds the torque of the motor. This means that once the Torquemaster throws the points there's nothing that'll slip through t he joint. The throw speed is between 4-5 seconds regardless of the scale modeled. Torquemasters offer quiet, reliable operation and should be powered by a 12V DC supply (provisions are made for higher voltages). A resistor is
...more about the Train America Studios Torquemaster Switch Motor -- Single Unit