Pivot-steered tandem rollers that are sustainable, intelligent and digitally supported – the HX series is the new Hamm flagship
Replacing the previous DV+ models, the new HX series combine intuitive operation with Easy Drive, high performance data, many comfort features and sustainable operation, as well as the “Smart Compact” digital compaction assistant. Not only that but the manufacturer has included a number of improvements when compared to its predecessors with new options and interfaces available.
High precision
The HX series is the new flagship for the Hamm fleet. Designed for asphalt compaction, the HX 70i (7 t/55.4 kW) and HX 90i (9 t/74.4 kW) both deliver high surface outputs on large construction sites. What’s more, they also impress in tasks such as compaction in curves, where a high degree of precision is achieved. It is here that the pivot steering, with a large turning angle, large track offset and four different steering modes, comes into its own.
Intelligent drive control
The foundation of the high compaction quality is intelligent drive control with automatic reversing. In combination with the electrically adjustable seat operating unit, it guarantees quality and comfort braking and accelerating the rollers quickly, but smoothly. A unique feature in the market, when reversing the seat also turns automatically in the direction of travel, producing first-class surfaces with ergonomic working and a high degree of safety.
Improved vision
It’s the new LED turn indicators and details around the cab give the HX series its distinctive design. The fully glazed panoramic cab offers a vastly improved field of vision with an excellent view of the drum edges. Lighting for drums and drum edges can be added as an option, whilst a camera system with two robust monitors (IP 67) is integrated as standard, providing an optimal field of vision. Thanks to division of the screen, views to the front and to the rear are always visible regardless of seat position. Also unique is the cab floor’s glass window for viewing the drums – which can also be folded in for cleaning.
Simple operation
The Easy Drive operating concept combines an ergonomically optimised operator’s platform with the sophisticated operating structure, including language-neutral and self-explanatory operation for the HX series. Despite the extensive machine functions, operation is intuitive and very quickly learned. Steering is performed with the steering wheel but all other important functions are operated via a joystick and the multifunction armrest. The position of armrests and tilt angle of the steering column are adjustable – not forgetting an ergonomic step, folding armrests on request and a comfort exit as well as further comfort features, such as 12 volt and USB sockets, plus a number of storage compartments.
New additive mixing unit
A revised dual-circuit additive mixing unit for the combination rollers, which includes a separately controlled sprinkling system at the front and rear, saves water and increases the range. In addition, water and additive can be sprayed separately or as a mixture. For spreading surface courses, Hamm has improved chip spreaders in the HX series: The HLS 150 line spreader (760 l) and HLS 170 line spreader (960 l), as well as the HDS disc spreader (750 l, spreading width 8 m). All models have the option for height adjustment. Optionally, an innovative lowering device is available, making installation and removal possible without a forklift truck or crane. The spreaders are operated from the operator’s platform and are fitted with automatically rolling tarpaulins and integrated LED lighting.
Compaction assistant
The Smart Compact compaction assistant can be used with HX series rollers. 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. This makes Hamm the first manufacturer in the world to automate the separate setting of both drums and is, therefore, raising process reliability and quality of compaction and surface to a whole new level.
Sustainability & fuel savings
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. Here, powerful travel pumps ensure high compaction power. Furthermore, the automatic engine stop automatically switches the engine off after an extended period of inactivity. Smart Compact also contributes towards sustainability. The assistant additionally achieves fuel savings of up to 15% by switching off the vibration or oscillation as soon as it is no longer useful. Finally, the rollers can be operated with diesel or HVO.
Documentation, communication and maintenance
Thanks to numerous interfaces, and the corresponding hardware, the rollers are prepared for future applications and challenges – be they concerned with quality, documentation or communication. Hamm also offers the option of integrating systems for avoiding collisions with a PDS (proximity detection system). Moreover, the JDLink telematics platform is available across all models and can be used to interrogate performance data, fill levels, error messages, operating hours or service intervals – anytime, anywhere.
Nine models and split drums
The HX series rollers are available with 7 t (HX 70i) and 9 t (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.
