gearbox 90 grad speed ratio 1:1 or 2:1,transmission efficiency up to 95%.cast iron or aluminum gearbox are available. NOSEN gearbox 90 grad RNV-Series,cubic shape of gearbox.Model: RNV-065,RNV-090,RNV-120,RNV-160,RNV-200,RNV-260Function: right angles change transmission directionsConfigurations: spiral bevel gears,bearings,gearbox,input and output shaftsMaterials: 1.Spiral bevel gears: alloy ...