Ampflow e30 400 79mm diameter 3in 24v motors and gearboxes ampflow e30 400 g the e30 400 g uses the e30 400 24v 21hp motor but is also fitted with a 831 reduction chain drive gearboxthese strong gearboxes give a huge amount of torque which is ideal for heavy duty robotics motorised vehicles and automation applicationsthe gearboxes are made using a three piece cnc machined aluminium case the mechanism comprises six sprockets three roller chains and five bearings the final sprocket