Ask 10 people what causes premature conveyor failure and you’ll typically hear the same short list: belt mistracking, worn idlers and poor maintenance.
Do a quick Google search, and mistracking usually tops the results. While conveniently acceptable, the latter misses the real story.
Conveyor failure is rarely due to one issue alone. Conveyors fail because – as a system – they are often misunderstood. Warning signs are ignored, and short-term decisions quietly stack the deck against long-term reliability.
“A common misconception is seeing the conveyor as a single piece of equipment,” says Chris Mullen, components territory manager at Superior Industries. “A better perception is viewing the conveyor as a collection of interdependent components – belt, idlers, pulleys, load zones, transfer points, skirt boards, cleaners – which each affect the performance of the others. Neglect any one of them, and the system will eventually expose that weakness.”
Mullen says conveyor failures rarely happen at convenient times.
“There’s a long-running joke in the industry that conveyor belts don’t break on Monday mornings; they break late on Fridays, weekends or overnight,” he says, adding that those failures aren’t random. “They’re the result of small issues compounding quietly while crews are stretched thin and attention is divided.”
Mistracking misdiagnosed
Belt mistracking is often blamed for conveyor problems, but it’s usually just the messenger.
According to Mullen, misaligned idlers, out-of-square pulleys, worn lagging, bent frames from mobile equipment contact can each push a belt off center. Until the true root cause is identified, adjustments become guesswork.
Operators may spend hours chasing the belt in one area while the real problem sits untouched somewhere else on the conveyor.
In addition, Mullen cautions that with a newer and less-experienced labor force entering the industry, the ability to diagnose root causes visually and mechanically is becoming rarer. The result is more band-aid fixes and fewer lasting solutions.
Maintenance pays
Another common reality is how differently preventive maintenance is viewed across operations.
Mullen says some operators see it as an unnecessary expense – something to minimize when budgets tighten.
“A better approach is treating it as a profit center, understanding that every dollar spent preventing failure saves multiples of that in downtime, cleanup, lost production and emergency repairs,” he says.
Mullen points to housekeeping alone.
“Manufacturer guidelines indicate that housekeeping can account for up to 40 percent of expected idler life,” he says. “That’s not an exotic upgrade or capital expense; it’s just basic cleanup. Yet, with limited crews and nonstop production demands, housekeeping is often the first thing sacrificed. That sacrifice shows up later as seized idlers, belt damage and unplanned outages.”
