A cold planer with a maximum milling width of 4 feet, the new Roadtec RX-400 is designed for projects where a compact machine design is an advantage, such as shoulder work. Contractors may start the cut directly in front of curbs, fences, walls or other obstructions. The RX-400 offers milling widths of 2, 3 and 4 feet, and a maximum cut depth of 12.5 inches. A Caterpillar C9 ACERT engine provides 325 horsepower, driving a maximum operating speed of 172 feet per minute. Conveyor swing of 60 degrees to either side adds to the versatility of the RX-400, which joins a product family featuring three established larger models.