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