The BOMAG BW 120 AC-4 is a compact, hydrostatically driven smooth drum roller designed for efficient asphalt and soil compaction on small to medium projects. It features a 27.6-inch diameter smooth drum with a nominal amplitude of 0.1 inches, delivering a static linear load of 57.7 pounds per inch and operating vibration frequencies between 3,300 and 4,200 vibrations per minute, ensuring high compaction efficiency. Powered by a reliable Kubota D1703 MDI three-cylinder diesel engine producing 34.3 horsepower at 2700 rpm, it offers robust performance with a fuel capacity of 10.6 gallons and a maximum travel speed of 6.3 mph. The roller has an operating weight of approximately 5,247 lbs, ground clearance of 8.3 inches, and a compact dimension set, including an 8.2-foot height to the cab top and an inside turning radius of 103.1 inches for enhanced maneuverability in confined areas. It operates on a 12-volt electrical system. This model is equipped with hydrostatic travel and vibration drive systems for smooth, reliable operation and precise control, making it suitable for road maintenance, landscaping, and small-scale paving projects. The roller’s minimal maintenance design includes an articulated joint requiring no lubrication and easy access to core components, supporting low operational costs and high uptime. Its ergonomic operator platform, combined with responsive controls, enhances operational comfort and productivity. The BOMAG BW 120 AC-4 stands out with its balance of compact size, effective compaction power, and ease of use in versatile site conditions.