Hamm Oscillation compaction — previously available only in Hamm’s larger tandem asphalt rollers — now is available in Hamm’s compact line as well.

Hamm’s non-aggressive oscillation technology has changed the way contractors work in North America, according to the manufacturer. Oscillation technology compacts with a gentle rocking motion, not a vertical pounding, and can be a powerful new tool for boosting asphalt paving productivity and profits.

Instead of vibrating straight up and down, the Hamm oscillatory design gives the drum a horizontal or “rocking” force which keeps the drum in contact with the mat. Hamm oscillation technology attains very high compaction numbers with minimal passes and no shattering of aggregate. Some contractors have found it permits contractors to remove one or more rollers from a job.

Models of the new compact line — with drum sizes from 31 to 54-in. (78 to 137 cm) wide — are functional yet user-friendly, and quiet yet powerful. These articulated tandem rollers offer big-time compactive effort in a small package equally at home for patching, commercial or roadbuilding applications, according to the manufacturer.

The compact line includes the HD 8 VV, with a drum width of 31.5 in. (80 cm); the 39-in. (99 cm) HD 10 VV and the slightly smaller HD 10 C VV; the 47-in. (119 cm) HD 12 VV; the 51-in. (129 cm) HD 13 VV; and the 54-in. (137 cm) HD 14 VV. Each offers an offset capability to enable compaction right up against a curb without risking damage from the trailing drum.

The compact line also offers combination rollers. The HD 10 VT, HD 12 VT, HD 13 VT and HD 14 VT are combination models with smooth drum in front, and four smooth pneumatic tires in rear.

VV stands for “vibration front, vibration rear”, in which both drums offer vibration, with the capability of vibration running in the front drum only, in the rear drum only, in both drums, or no vibration. The compact line offers hydrostatic dual drum drive, automatic/manual vibration system, hydrostatic articulated steering and increased maneuverability.

Key features of the compact line include its visibility to the drum edges, as the engine is mounted lengthwise and not sideways in the frame, low profile, and ease of handling. Its driving characteristics are due to its three-point articulation that maintains even weight distribution across the drum width, even in tight turns, thus reducing cutting on the asphalt surface, and its high compaction force and low center of mass.

The operator platform is fully insulated against vibration, thus improving comfort levels. The operator’s seat, steering column and tread plate are mechanically isolated from the framework, which significantly reduces vibration.

For more information, call 615/501-0600 or visit www.wirtgenamerica.com.

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