The SW880 high-frequency vibratory asphalt roller from Sakai America offers a drum width of 79 inches and 4,000 vpm, which allows for 10 to 12 impacts per foot at 4.55 mph. According to the company, the counter-rotating weight design helps achieve density at fast speeds. The front drum eccentric weights rotate clockwise while the rear drum weights rotate counterclockwise or vice versa depending on amplitude.
For more information, check the box for Reader Service No. 17 at http://www.freeproductinfo.net/rer.
