... gearbox worm speed reducer 2.Material:casting iron-House, 10-3Cooper- Gear, #45 steel-shaft 3.ISO9001,Warranty-1yea WPWDKT gearbox worm speed reducer ... TypeWPWDKT gearbox worm speed reducerSize40-250Ratio10,15,20,25,30,40,50, ... of Shaftchromium steelOil sealTai Wan NAKBearingREN BEN.CUWPWDKT gearbox worm speed reducer specification