Profile: SGC Dorris Co. specializes in manufacturing standard speed reducers, gear drives, enclosed helical shaft mounts and screw conveyors. Our TL screw conveyor drive features drive shaft kit, trough end adaptor kit, high performance packing gland, grease/air purge packing gland, 303 stainless steel output shaft and three-hole drilled output shaft. Our base type gear drives are designed for minimum bearing and gear life of 10,000 hours under rated load.