The life expectancy of fusing belts varies widely. The biggest factor is how well the fusing machine manages the belt tracking. Poor belt tracking puts stress on the belt and can cause wear or belt creasing which in turn causes cracks and rips on the belt.
Incorrect belt tracking can destroy a new set of belts in a matter of minutes. Small fusing machines tend to have simple belt tracking systems that may allow the belts to last from a few months to a year. Large machines are often able to run a set of belts for several years.
Accidents such as scissors or pens passing through the machine or mechanical failures claim many belts prematurely. More.
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