Valley Irrigation 31:1 gear ratio footed right angle worm drive gearbox. 31:1 ratio, 6.836" electric motor bolt circle, Valley part #03E3492. Application: 56 RPM worm drive centerdrive gearbox. Pair with Valley part # 03E3860 motor to make Valley part # 03E3867 centerdrive assembly. This gearbo can be usedwith applicable Valley/Nidec branded motors.