... advanced world. Steel Castings sand mould making High-precision large ring gear tooth occlusal accuracy of the advanced world. Steel CastingsEfficiency: ... SAE,DIN or special requirements from Customers.1) Chain wheel, gear wheel, sheave, idler wheel, platen, winding drum, helm ... body, valve body etc. for petrochemical industry working.(5) Gear, Bull Gear, axial seat, big shaft, block, module etc.(6) ...