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Radial Telestacking Conveyors

Application

Radial Telestacking Conveyors

Issue

Bearing failure, maintenance costs

Description

One advantage of the radial telestacking conveyor is its ability to sweep side-to-side in an arc as well as extend outwards. This allows the aggregate to be stacked into a wider and more controlled stockpile.

When reversing its sweep direction with its stinger extended, the conveyor can experience "whip" — meaning the sudden change in direction can cause significant side loading and vibration along the length of the conveyor. One customer's telestacking conveyor experienced this problem while stockpiling aggregate material. The bearings on the tail pulley were experiencing this "whip effect" and as a result, frequent failures. It was determined that the bearings were likely being subjected to excessive thrust loading.

Solution

Sealmaster® USRB-5000-307

Result

Originally, the bearings on the tail pulley were ball-bearing, take-up frames. The user rearranged the pulley in 2007 and installed a competitor's pillow block ball bearings on a rigid base. These failed after only four to six weeks in operation. These were replaced with the competitor's spherical roller bearing product with similar results.

After the switch to the Sealmaster USRB bearings, the unit ran for five months (until the end of the season). The original USRB bearings are still in place awaiting another season of operation.