The HAMM HD+ 80i OT is a high-performance smooth drum roller designed for efficient asphalt compaction. It features a front smooth/non-split oscillation drum with a diameter of 44.9 inches, width of 66.2 inches, and thickness of 0.8 inches, providing a centrifugal force of 14,163 lbs in both high and low modes. The front oscillation force reaches 28,775.6 lbs with oscillation frequency of 40 vpm, offering superior compaction on varied surfaces. It operates at vibration frequencies of 42 and 50 vpm with a nominal amplitude of 0.1 inches on both high and low settings. Powered by a Deutz TCD 2.9 L4 EPA Tier 4 engine delivering 74.2 hp at 2500 rpm, the machine balances power and efficiency. Its operating weight is approximately 21,870 lbs, with the cabin version weighing 16,446.5 lbs and ROPS version 16,071.7 lbs. The machine’s dimensions include a ground clearance of 29.6 inches, overall length of 176.4 inches, overall width of 5 feet, and a tight inside turning radius of 13.6 feet, enhancing maneuverability. It supports a maximum speed of 3.8 mph and carries a 31.8-gallon fuel tank. The roller’s oscillating angle is 10 degrees, allowing for smooth operation on uneven terrain. Additionally, it has a water spray tank capacity of 185 gallons to aid in dust control during compaction. This combination of powerful engine, precise oscillation, and ergonomic design makes the HAMM HD+ 80i OT a robust solution for achieving smooth, high-quality asphalt surfaces.