... . Ratio: 3---10,000 3.Precise backlash is less than 3 arcmin PL WPL SERIES Planetary Gearbox,planetary reducercylindrical external shell, small volume, compact ... of Siemens,Japan Yaskawa , Panasonic , Mitsubishi and Fuji . Technical data Type: 40mm---400mm Ratio: 3---10,000 Transmission torque: up to ...