Conveyor-drive bearing degradation detected six weeks before failure

Background

At a bulk handling facility, a main conveyor depends on its drive bearing to keep the line moving. A failure at that bearing can stop the whole line. The maintenance question is how to recognize deterioration early enough to choose when the replacement happens, while the conveyor is still operating.

The problem

The bearing gives little audible warning. Waiting for a noticeable sound leaves maintenance with less opportunity to arrange the work. The useful signal is a change from the bearing’s established behaviour, seen over time while the asset continues to run, rather than a fault first discovered after the conveyor stops.

How we found it

We use vibration and temperature monitoring on the drive bearing, with motor current supplying runtime hours. The trend is compared with the asset’s own baseline. Alerts call attention to a changing signature so maintenance can review the direction of the readings and the operating history behind them.

What changed

The changing vibration signature gives the team advance warning ahead of the projected seizure point. The bearing change is planned for a Saturday. Maintenance can schedule the repair around the line instead of letting the failure determine the timing. The warning concerns a projected failure, so the trend remains the basis for review as the work approaches.

The lesson

We keep the asset’s history with the current reading. A single vibration value is less useful to this job than seeing how the same bearing has changed while accumulating runtime. That record gives maintenance a reason to investigate and a basis for planning. After a bearing change, continued monitoring lets the team follow its behaviour as the conveyor returns to service.