Hi,

Normally, it is 40.000 running hours.

But if you run it in very bad conditions (hot, dusty, etc) then it is lower. Also if the machine starts-stops-starts-stops very often, then it will be lower.

The best way is to take SPM measurements (shock pulse measurements of the bearings) and do this every few months.

The absolute value doesn't mean much, but look for the trend.. normally you will see it rising slowly .. if it rises quickly and then drops, the bearings are going bad.

Hope this helps!

Cas