The David Round RailRunner Tractor Drives possess a broad load capacity, spanning from 1,000 to 30,000 pounds. They can achieve travel speeds of up to 300 feet per minute. These drives are equipped with four universal flanged trolley wheels and a spring-loaded rubber drive wheel for optimal performance. Designed for compatibility with both tapered and flat-flange beam styles, they utilize heavy-duty chain/sprocket drive systems. The units run on 240/360V - 60Hz power and feature a 30-phase configuration. Manufactured in the USA, most items are readily available for shipment from stock. Various track widths can be accommodated, with customization options available to address travel speed and space limitations. Explosion Proof (EX) rating, enclosed track, free-wheeling, and stainless steel construction are also available upon request. FOB Shipping Point.