The Tru-Trac Dual Return roller system is patented worldwide and developed to cope with the excessive forces generated by wide belts, heavy loads and belt speeds in excess of 4 m/s. The externally mounted axial mechanism is designed to eliminate the need for one large drum and to achieve concentric and balanced rotation of the rollers. This resulted in extended bearing life and the creation of a very fast and effective roller alignment system.
Tru-Trac dual roller assemblies work in a similar way to single rollers, except that a central axle is used instead of a pin embedded in the inner drum. When the tape slides off the center of the roll, it touches the tapered outer edges of the rolls. When the belt moves over the part of the roller with a smaller diameter, there is a difference in the frictional force that causes the axis to rotate and one of the rollers to move forward and the other to the rear, thus the tape is directed back to the center.
Tru-Trac Dual Roller Units are available:
|Dual Return||standard set of double rollers in dimensions from 1350 to 2500 mm|
|Polyurethane Dual Return||rollers covered with polyurethane for very heavy working conditions and belts operating at very high speeds in dimensions from 1350 to 1800 mm|
|Low Speed Dual Return||a set of rollers designed for belts operating at a speed below 1m/s in dim. from 1350 to 2500 mm|
|Compact Dual Return||compact version designed for conveyors with a small clearance between the belt in dimensions of 1350 – 1800 mm|
|V-Return||a set of rollers for assembly on the return of the tape at trough units in dim. 1350 – 2500mm|