Assertion: failure's cause | /r/HasProperty | defective bearings
Facets:
Source sentences:
text: In the case of non-typical vibrations, the main causes are: defective bearings and gears, electrical and mechanical failures in motors, problems caused by misalignments, unbalances or unstable bases, bent shafts, pulley or belt failures, mechanical gaps, aerodynamic or hydraulic problems, etc.