... , helical. ect Approved by I Girth gears are widely used in steel, sugar, paper, mining, cement, chemical, clean ... Gears from 10mm to 16000mm. now our company is becoming a famous gear brand in and abroad China ... successfully made the girth gear used in 2mt oxidized pellet rotary kiln, which is the largest girth gear in ... machine super works. large modulus gear ring used for ball mill or rotary kiln