As we know, and as we have already had the opportunity to remember several times on these pages, to allow the consequence to maintain its performance for as long as possible with efficiencies similar to the initial ones, resolving and identifying anomalies that could cause significant damage and failures in the future , it is advisable to carry out some appropriate maintenance and control operations on a scheduled basis.
But what are they? And what precautions should be followed?
Control during the operational phase
With regard to preventive checks, it is essential to try to guarantee adequate control of the bearing during operation : it will therefore be necessary to carry out periodic inspections that will serve to detect the noise levels of the bearing during its activity, monitoring its temperature or the possible presence of vibrations. Even in the case of slight peeling, irregular bearing noise can be easily detected using a common stethoscope.
Regarding temperature monitoring Although it is possible to obtain a first impression of any obvious anomaly simply by touching the outer surface of the housing, for a more accurate check it would be advisable to detect the bearing temperature by inserting a thermocouple directly into the lubrication hole or into a similar point entry.
Controlling the most “difficult” bearings
It may happen, however, that there are bearings that are difficult to access or that, in any case, do not allow “simple” checks such as those set out above: this is the case, for example, of bearings mounted on moving parts in which it is not possible to detect noise or temperature during operation. Let us consider, as a non-exhaustive example, vehicle roller bearings, which can be inspected periodically by applying new grease.
Examining the condition of fresh grease during bearing operation can also be helpful in establishing the operating condition of the bearing itself, which can be assessed based on the amount of contamination and iron filings present in the grease, as well as any signs of leakage. or deterioration of the grease.
As you can imagine, if these checks reveal anomalies or signs of bearing failure, the bearing must be dismantled to carry out a more precise inspection, useful for identifying the causes of failure.
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