Profile: Chicago Gear-D. O. James Corp. produces gears and gearboxes. We offer gears such as helical gears, spur gears, internal gears, herringbone gears, ground tooth gears and straight or spiral bevel gears. Our standard H-line gearboxes features standardized parallel shaft and right angle gear drives with carburized & hardened gearing available in ratios up to 500:1. We design drive systems for industries such as steel, metalworking, chemical, paper, cement, rubber, mining and material handling. We specialize in spur/worm/helical gearing, straight bevel gearing, spiral bevel gearing, gear shaping, gear shaving, milling and turning.