... iron or aluminum gearbox are available. NOSEN spiral bevel gear reducer RNV-Series,cubic shape of gearbox.Model: RNV-065, ... transmission directionsConfigurations: spiral bevel gears,bearings,gearbox,input and output shaftsMaterials: 1.Spiral bevel gears: alloy steel,case hardened ... of gearbox are machined by milling machine,gloss surfaces4.Input&Output shaft: S45C,heat treatedSpeed Ratio: 1:1,2:1 ...