... Reducer Worm Gearbox Reducer 2.Model:RV030,Ratio:7.5-100 NMRV030 Ratio 1:7.5-1:100 Aluminium Double Extension Worm Shaft with ... WhiteMaterial:Housing-Casting iron-HT200#(Aluminium)Worm Gear- Cooper-10-3 #Worm-20CrMnTi with carburizing and quenching, surface hardness is 56 ... ,0.18kw,0.25kw,0.37kw,0.55KW,0.75kwUsages:In industrial machine: Food stuff,Ceramics,chemical, aswell as packing, printing ...