Girth Gears More than Just Metal and Teeth Gear Technologysuch as SAG semi autogenous grinding mills and ball mills for use in the mining and cement industries By current stan dards girth gears can be as large as 14 meters 46 feet in diameter meters 44 inches face width and 50 module 5 DP tooth size and weighing upwards of 120 tons Flange mounted gears rely in