... Reducer Worm Gearbox Reducer 2.Model:RV030,Ratio:7.5-100 NMRV030 Ratio 1:7.5-1:100 Aluminium Double Extension Worm Shaft ... and quenching, surface hardness is 56-62HRCShaft-chromium steel-45#Packing:Paper carton (Plywood box) / per set(With foam board ... 75kwUsages:In industrial machine: Food stuff,Ceramics,chemical, aswell as packing, printing, dyeing,woodworking, glass and plastics…..IEC Flange:80B5, ...