The HAMM HD 13 VO (VIB/OSC) is a compact tandem smooth drum roller designed for high-quality surface compaction of asphalt and other paving materials. It features a vibration and oscillation drum system, enabling efficient compaction with reduced noise and minimal risk of material damage, ideal for urban and sensitive environments. The roller has a 51.2 in (1,300 mm) drum width and a maximum working width of 56 in, with a rear drum diameter of 35.5 in (90 cm) and a drum thickness of 0.7 in (18 mm). It is powered by a Kubota V2203 diesel engine delivering 46.4 hp, meeting EU Stage IIIA emission standards. The HD 13 VO has a 3-point articulated steering system, providing excellent maneuverability with an inside turning radius of 106 in (269 cm) and a wheelbase of 76.78 in (195 cm). Operating weight is 11,530.2 lb (5,239 kg) with ROPS, and the machine measures 114.02 in (2,900 mm) in length, 4.68 ft (1,425 mm) in width, and 8.93 ft (2,720 mm) in height to the cab top. Vibration frequency is 51/60 vpm (48/57 Hz front, 39/30 Hz rear), with tangential amplitude of 0.1 in (2.5 mm) and oscillation forces of 16,186.3 lb (7,342 kg) and 9,666.8 lb (4,385 kg) on the rear drum. Travel speed is infinitely variable up to 6.9 mph (11.1 km/h), with a 19.3 gal (73 L) fuel tank and a 75.3 gal (285 L) water spray system for dust and temperature control.