Base drives offered in ratios from 1.5 to 250:1, sizes 900-10,000, torque ratings up to 240,000 in-lbs. output. Screw conveyor drives available in sizes 107 to 407, ratios of 5:1 to 40:1. Shaft mount drive sizes 107 to 700, gear ratios of 5:1 to 250:1. Piggyback styles utilize two separate drives & are used in high-ratio applications. Multiple shaft outputs & configurations are available.