The David Round RailRunner Tractor Drives are capable of handling loads ranging from 1,000 to 30,000 lbs. with travel speeds reaching up to 300 feet per minute. These drives come equipped with four universal flanged trolley wheels and a spring-loaded rubber drive wheel for efficient movement. They support use with tapered and flat-flange beam styles and are paired with a heavy-duty chain/sprocket drive system. Power requirements include a 240/360V - 60Hz, 30-phase supply. Made in the USA, most items can be shipped from stock, and customization is available for various track widths, travel speeds, and space constraints. Options also include an Explosion Proof (EX) rating, enclosed tracks, free-wheeling, and stainless steel construction. For specific details, please contact us. Shipping point applies to Free On Board (FOB) pricing.