... wind power, petrochemical industry Features: Big Size gear ring for wind power, petrochemical industryCeritification: TUV, ISO9001 Standards ... the maximum outside diameter: 3, 200 mm Ring forging can forge the maximum outside diameter: 4, 000 ... shafts, ship shafts, heavy gears, flanges, ring pieces, all kinds of forging parts etc. If you have free, ... question, please contact me. large forged gear ring