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Plain Bearing Failure
10. Manufacturing faults and Assembly Errors
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10.1 Barrelled Shaft
10.2 Undersize Bearing Shells or Oversize Housing Bore
10.3 Incorrect drilling of oil feed hole
10.4 Incorrectly Inserted Thermocouple Causing Distortion of Bearing Surface
10.5 Misalignment
10.6 Dirt Between Thin Shell Bearings and Housing
Bearing failures can occur as a result of manufacturing or assembly errors. A few examples are given, but obviously there is no general pattern as the failure mechanism depends on the type of error.
In the event of unusual effects that do not match with any of those illustrated in the previous Sections, a careful examination should be made of the whole bearing assembly for any manufacturing defects or assembly error that could account for the damage. This should include the back of the bearing or bearing shell for peculiar markings and a check of the journal for taper, barrelling or corrosion damage.