... 95%.cast iron or aluminum gearbox are available. NOSEN HEAVY DUTY GEAR BOX RNV-Series,cubic shape of gearbox.Model: ... iron, six faces of gearbox are machined by milling machine,gloss surfaces4.Input&Output shaft: S45C,heat treatedSpeed Ratio: ... Industries:diesel engine drive water pump,textile,food processing machine,medicine,rotary axis drives, conveyors, packaging equipment,material ...