Dynapac adds oscillation to double drum rollers

Dynapac oscillation roller

Dynapac North America has expanded its roller product line with the addition of the CO4200 Generation VI double drum roller with oscillation.

The new roller model delivers an additional heavy compaction solution for operators. The CO4200 VI allows the operator to select the system that is most suitable for the application at hand. The double drum roller is the first in Dynapac’s product line to feature oscillation.

“This new machine was developed based on feedback from end-users of our trusted roller product line, and we’re extremely pleased to launch the new double drum roller with oscillation to the North American marketplace,” said Tim Hoffman, product manager for rollers at Dynapac North America.

“Operators will really appreciate the overall durability of this machine, coupled with Dynapac’s commitment to providing an extremely balanced roller, ultimately contributing to outstanding compaction results. This new machine is without a doubt designed to perform and built to last.”

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According to Hoffman, the latest oscillation technology offered in Dynapac tandem rollers meets specific needs in the marketplace, particularly high-quality compaction in areas where vibration must be reduced — like bridge decks or areas adjacent to foundations — or in thin asphalt overlay applications. The oscillation compaction concept also may help reduce the risk of damage for less qualitative aggregates.

The Dynapac CO4200 VI is equipped with a drum shell fabricated from Hardox 450, an abrasion-resistant steel with a nominal hardness of 450 HBW. The particular grade of Hardox steel provides dent resistance, minimizing wear and tear, as well as contributing to the overall longevity of the machine.

In addition to the incorporation of harder and more durable steel, the new roller model also streamlines serviceability by providing easy access to belts and other components through the integration of manholes in the drum.

Belts can be accessed and replaced in as little as two hours, reducing downtime and increasing productivity on the jobsite.

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Like other Dynapac rollers, the new CO4200 VI also features a balanced operating mass for front and rear modules, weighing in at 5,000 kg and 4,900 kg, respectively. The balanced design of the new Dynapac roller model helps reduce roller marks and delivers a consistent compacted surface with every pass.

The new models feature an oscillation force of up to 122 kN with an oscillation frequency of 2,400 vpm. When operated in vibration mode, the unit delivers up to 128 kN of centrifugal force and a vibration frequency of 3,060 vpm in high amplitude mode and 84 kN of centrifugal force and 4,020 vpm in low amplitude mode.

The roller is powered by dual Cummins QSF3.8 water-cooled turbo diesel engines and can reach ground speeds of up to 12 km/h.