The smallest roller incorporating exclusive Hamm Oscillation Technology is the HD O70V. With an operating weight of 16,402 lbs., the HD O70V is of 59-inch-wide double-drum, articulated configuration, with offset working width of 62.5 in. The machine generates oscillation frequency of 1,800 to 2,160 vpm in the rear drum, and 2,520 to 3,000 vpm conventional vibration frequency in the front drum.