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.
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