Sakai is on a roll

  • 25-Jul-2008 04:23 EDT

The padfooted roller of Sakai's SV510-III series is especially useful on clay and silt surfaces.

Sakai, the self-proclaimed “Masters of Compaction,” has introduced a new series of dirt rollers to further its product lineup.

Designed for compacting large areas, the SV510-III series machines are single-drum compactors with pneumatic tires at the rear. There are four variations to meet varying demands. The SV510D is a smooth drum model, while the T had a padfooted drum. The smooth drum is ideal for rocks and gravel, while the padfooted version is better for silts and clays.

The TB version comes with a strike-off blade to eliminate the need for backfill equipment, and the TF version comes with a padfoot drum encased within a bolt-on smooth drum. This combination keeps the padfoot diameter at an optimum size when the smooth shell is removed.

All 510 series models are vibratory rollers and, unlike static rollers that depend on the weight of the machine to generate the forces required to compress materials, produce a dynamic force that generates a high compaction effect. This dynamic force is created by rotating an off-balanced weight within a steel compacting drum. This rotation develops a centrifugal force that is sufficient to lift and drop the heavy steel drum as it moves through its cycle. This cycle repeats itself from 28 to 67 times per second as the machine moves across the material surface, according to Sakai.

These dynamic forces typically increase the compacting force up to six times the actual static weight of the drum assembly while helping to rearrange the material particles at the same time for a denser fit.

Having pneumatic tires allows the rollers to grade slopes of up to 62%. The machines all have articulated steering, and the central hinge consists of taper roller bearings and a large ball bearing.

Powering the 510 series is a 148-hp (110-kW) Tier 3 Cummins turbocharged diesel 4.5-L inline four. The engine is mounted on rubber pads to protect it against vibration from the rollers.

Safety is always a concern in construction zones, and 510 series machines come with rollover protection, seat belts, and a two-brake, three-way failsafe system.

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