NeveRest Classic Gearbox No MotorDescription Specifications Documentation The NeveRest gearbox is the cutting edge gearbox found on the NeveRest gearmotor. If you wish to change out the gearbox on an existing NeveRest 40 or NeveRest 60 gearmotor or have the motor only, this is a drop in replacement gearbox. Screws are included with the gearbox. If you need the output shaft to be a 1 2 in. Hex, check out the 6 mm D to 0. 5 in. Hex Shaft Adapter (am 3744a) Choose between 40: 1 or 60: 1