... wheel1.widely used in turbines,shaft liners and axletrees,good resistance to wearing,with high precision ... feature:1.widely used in turbines, shaft liners and axletrees;good resistance to wear, with high precision ... running castings. 2.With air vent and high precision.3.The structure is compact and the weight is large. 4.Packing: ... .00 10.43 8.62factory photos in the following; worm wheel and shaft