Hamm tandem rollers allow operators to choose vibration, oscillation, or both
Hamm has expanded its HD+ series of tandem asphalt rollers with two new machines that allow users to choose between vibration or oscillation depending on the needs of the job.
The HD+ 120i V-VIO and HD+ 120i VIO-2 HF are equipped with easy interfaces for digital applications and the Easy Drive operating system, just like the previously launched HD+ machines. The difference for these 12-ton machines is in the drums. The HD+ 120i V-VIO features a vibrating roller drum (50 Hz or 3,000 vpm) on the front, and a VIO drum at the rear that can either vibrate or oscillate.
The HD+ 120i VIO-2 HF has two VIO drums that are capable of either vibration or oscillation as called on by the needs of the job. With this machine, the front drum relative to the direction of travel can always work in vibration mode, while the following drum can be used with oscillation or for static compaction, to achieve the best possible results.
In addition, the HD+ 120i VIO-2 HF has been designed as a high-frequency machine for the North American market, offering a vibration frequency of 67 Hz or 4,020 vpm (front and rear).
Both new machines are powered by a 154-hp Deutz engine.
These rollers offer contractors the ability to perform static compaction, use oscillation, or use vibration in one machine - and, in the case of the HD+ 120i VIO-2 HF, to combine oscillation and vibration together, which reduces the number of machines and operators needed on the job site. In all, the HD+ 120i VIO-2 HF offers nine different combinations of compaction methods, providing versatility to reach compaction requirements in fewer passes. High compaction quality can be reached even at higher working speeds.
Oscillation has a number of benefits for compaction and can be used in vibration-sensitive areas. It reduces noise emission and vibrations experienced on and around the job site. Oscillation can be used in low outside temperatures. The system prevents particle crushing and overcompaction. The new VIO drums require no maintenance, thanks to wear-resistant steel and a temperature-resistant special belt.
Along with the new drum combinations, the two new rollers offer large driver's cab designs with good visibility around the machines, the Easy Drive operating system, and a variety of interfaces for connection of telematics systems, fleet management systems, and digital applications for controlling and documenting compaction.