... Housing 2) Aluminium Bronze Worm 3) 8620/20CrNiMo shaft Features:Gearbox, Gear case, Gear, Worm, Worm Shaft, Casting, Sand-Casting1) Ductile ... Units Produced(Previous Year) Stamping Parts & Machining Parts Product Line Gearbox 1,000 Pieces / Month, Gear & Worm Gear 4,000 ... Gear 40,000 Pieces, Valve 5,000 Pieces, Welding Structural 200,000 Pieces, Automobile Stamping Parts 5,000,000 Pieces Export ...