To provide a solution to the problem, ABS developed a special product. The new roller is supported by a pair of tapered roller bearings arranged in “O” with an axial clearance precisely determined by a regulating nut. To prevent the entry of the anticorrosive liquid and other contaminants, two frictional seals were placed at each end of the roller.
As an integral part of the development process of the new roller, a lubricating grease that achieves total metal-metal separation between the tapered rollers and the race during the normal operation of the tensioning machine was chosen. The new solution will allow us to extend the continuous operating time of the tensioning line, reducing the current high rate of roller consumption and significantly increasing productivity, by reducing downtime due to corrective stops for the replacement of damaged components. In turn, the new design can be disarmed and repaired, also making it possible to grind and refinish the outer surface. The new design simplifies the disassembly of the roller for inspection of components, replacement, and grinding of the outer diameter.
On November 24, 2016, the flex and support cassettes equipped with the new ACB USA rollers were assembled at the entrance of the tensioning machine, starting a 6-month trial period with a monthly review of the condition of the rollers and the subsequent re-entry.