Hamm’s new HX series of rollers includes a suite of advancements
The HX series replaces the previous DV+ series and includes Easy Drive, high performance data, many comfort features and sustainable operation, as well as the Smart Compact digital compaction assistant.
Designed for asphalt compaction, the HX 70i model (7t/55.4kW) and HX 90i (9t/74.4kW) achieve high surface outputs on large construction sites. The pivot steering shows its strengths with a large turning angle, large track offset and four different steering modes.
Along with intelligent drive control with automatic reversing. The seat also turns automatically in the direction of travel when reversing.
The glazed cab includes a camera system with two monitors so views to the front and rear are always visible regardless of seat position. The cab floor’s glass window allows for viewing the drums.
With the digital compaction assistant Smart Compact, Hamm automates setting of each drum and increases process reliability.
A revised dual-circuit additive mixing unit for the combination rollers saves water and increases the range, as the sprinkling system at the front and rear are controlled separately. Water and additive can be sprayed separately or as a mixture.
For spreading surface courses, Hamm has improved chip spreaders in its range for the HX series: the HLS 150 line spreader (760L) and HLS 170 line spreader (960L), as well as the HDS disc spreader (750L, with a spreading width 8m).
The Smart Compact compaction assistant can be used in the rollers of the HX series. The system decides compaction automatically and individually for each drum – whether to compact with vibration and big or small amplitude, with oscillation, or statically. The driver then only has to enter whether a base, binder or asphalt surface course is to be compacted. The assistant evaluates data about the condition of the asphalt, optionally incorporating local weather data from an integrated weather station.
The engines work at a lower speed of 1,500–2,000 rpm, which reduces fuel consumption as well as noise and exhaust gas emissions. The automatic engine stop automatically switches the engine off after an extended period of inactivity. Up to 15 per cent of fuel is saved by switching off the vibration or oscillation as soon as it is no longer useful.
The HX series rollers are available with 7t (HX 70i) and 9t (HX 90i) operating weight. Among the nine total versions are models with two vibrating roller drums, an oscillation and a vibrating roller drum as well as combination rollers. Here, the vibration and oscillation drums are made as a split or non-split drum depending on the model.