Rolling bearings are machine elements found in a wide field
of applications. They are reliable even under the toughest conditions
and premature failure is very rare.
The first sign of rolling bearing damage is primarily unusual
operating behaviour of the bearings. The examination of
damaged bearings reveals a wide and varied range of phenomena.
Inspection of the bearings alone is normally not enough to
pinpoint the cause of damage, but rather the inspection of the
mating parts, lubrication, and sealing as well as the operating
and environmental conditions.
It may have already occurred to you that this "toughest job you'll ever love seems almost
impossible. Look at some of the obstacles you may be facing. Your students are numerous;
many may be older than you. Textbooks are scarce, and again, many may be older than you.
The physical conditions are austere, with a tin roof that creaks as the temperature rises and
obliterates all other sound when the rains come. Pictures and posters disappear from the
classroom walls. Desks are too few. The blackboard has been worn to a light grey and chalk