... backlash is less than 3 arcmin PS WPS SERIES,Planetary Gearbox,Planetary Gear Reducer,cylindrical external shell, small volume, compact structure ... , output end planPlanetary Gear Box,Planetary gear reducer,Planetary reducer,gearbox,gearmotor Featurescylindrical external shell, small volume, compact structure ... precision grade:3 arcmin Installation: random, PS WPS Planetary gearbox