The HAMM H 25i is a robust smooth drum roller designed for high-performance soil compaction. It features an 84.3-inch (2.14 m) wide drum with a diameter of 5.25 feet (1.6 m), providing optimal ground contact for efficient compaction. The machine operates with a Deutz TCD 6.1 L6 water-cooled 6-cylinder inline diesel engine delivering 214.6 HP (160 kW) that meets stringent emission standards through advanced aftertreatment including DOC, DPF, and SCR systems. It offers a statical linear load of 435.5 lbs/in (77.8 kg/cm) and a centrifugal force of 74,411 lbf (331 kN), enabling effective compaction performance on various soil types. The H 25i has an operating width of 99 inches (2.51 m), an inside turning radius of 165.4 inches (4.2 m), and a transport dimension of about 21.65 ft length, 8.23 ft width, and 9.74 ft height (6.6 m x 2.51 m x 2.97 m). It weighs approximately 55,039 lbs (24.92 t), providing excellent ground pressure for compaction work. Steering is via articulated hydrostatic drive with a 3-point articulation system for superior maneuverability and off-road traction. The operator’s cab features ergonomic seating and clear visibility, supported by modern electronic machine management (Hammtronic) for efficient operation, traction control, and continuous compaction measurement. The vibration system operates at frequencies of 27/30 Hz with amplitudes of 2.02/1.20 mm, optimizing compaction force delivery. Designed for ease of maintenance and long service intervals, the H 25i ensures reliable, efficient performance in demanding construction and road building applications.