... 42CrMo, cast iron Gear dia: 500mm to 10000mm Module: 10-50 Tooth: Spur, helical. ect Approved by I ... Girth gears are widely used in steel, sugar, paper, mining, cement, chemical, clean ... , we successfully made the girth gear used in 2mt oxidized pellet rotary kiln, which is the largest girth ... machine super works. large modulus gear ring used for ball mill or rotary kiln