By Katie Weiler, Managing Editor | September 28, 2010

CC622 HFThe 12.5-ton CC622 HF tandem roller has a drum width of 84 inches and dual frequencies and dual amplitude measurements of 3,060/3,780 vpm and 0.024/0.008 inches. It features a drum diameter of 55 inches and an operating weight of 27,783 pounds. According to the company, the high frequency combination works well to compact thin layers with protection of the aggregates. It can also be adjusted to low frequency and high amplitude to be used for base and binder courses as well as thin wearing courses.