Features: Gear case,Worm&Worm Shaft, 1) Ductile Iron or Gray Iron Housing 2) Aluminium Bronze Worm 3) 8620/20CrNiMo shaft Features: ... , Gear case, Gear, Worm, Worm Shaft, Casting, Sand-Casting1) Ductile iron and gray iron sand casting gearbox2) Reducer type3) Torque and transmission are ...