SW652-1/-1k, standard model features 4,020vpm high frequency vibration by which can efficiently achieve the density faster and create smoother hot mix asphalt(HMA) mat.
"B model", split drum type is also equipped with high frequency vibration and is easy to operate in the tight corner without pushing or shoving the material.
On "NDH model", oscillatory or circular (normal) vibration is selected by switch at operator station depending on the job conditions. The oscillatory vibration is good for thin lift and the circular vibration is effective for thick layer compaction.