The David Round RailRunner Tractor Drives offer impressive capabilities, handling loads ranging from 1,000 to 30,000 pounds at speeds up to 300 feet per minute. Featuring four universal flanged trolley wheels and a spring-loaded rubber drive wheel for enhanced performance. Engineered to work seamlessly with tapered and flat-flange beam styles and a heavy-duty chain/sprocket drive system. Powered by 240/360V - 60Hz, 30-phase electricity. Manufactured in the USA, with most products readily available for shipment from stock. Customization options are extensive, accommodating various track widths and enabling adaptations to meet specific travel speed and space requirements. Models are also available with Explosion Proof (EX) rating, enclosed track, free-wheeling, and stainless steel construction. Please contact us for further details. Shipping terms include FOB at the shipping point. Additionally, steel surcharges may be applicable.