Screw conveyors from ML Spirals use high-strength alloy steel that provides wearing ability, as well as torque requirements in various spiral applications. They are cold-formed in a multitude of close-tolerance diameters, and pitches up to 30 inches in diameter, and in a variety of bar sizes as large as 5 by 1 1/2 inches. Aftermarket Spaans Screw Conveyor parts are also available. 416/277-4262; www.ml-spirals.com.