... ,gear box. Speed Reducer Main components including worm sharft,worm gear,bearings,oil seal,input flange,gear box,cover,pedestal.Three main types.1.Single Speed ... Reducer.(Ratio:1/10-1/60) 2.Double Speed ... (Ratio:1/100-1/3600) 3.Universal Speed Reducer (Ratio:1/10-1/60) Single Speed Reducer:WPA,WD,WPA,WPS,WPO,WPX ...