Methods for Identifying Failed Bearing Condition Data

Bearings should be removed from equipment due to the need to identify the cause of bearing damage and avoid future failure. For the most reliable results, the following procedures can be used when storing and inspecting bearings. In this way, when inspecting bearings removed from equipment preventive maintenance, consider the following points. Suggested inspection sequence: Check operating data, evaluate records and graphs from bearing monitoring equipment, take lubricant samples, check bearing environment for external influences and other damage factors Bearings and components marked Check bearing mating surfaces Evaluation of complete sets of bearings Check individual bearing parts or send to FAG. If an inappropriate process is chosen, important data needed to find the cause of bearing failure can be lost forever. Failure to protect a failed bearing can also mask the failure mode or at least make it difficult to discover the true cause of the bearing's failure. Identifying operating data When a rolling bearing fails, not only the bearing itself, but also the operating environment and application conditions must be checked in advance (see assembly drawings if possible). Application background: equipment, bearing position, actual working life, how many similar equipment and how many bearing failures in these equipment Bearing structure: locating bearing, floating bearing floating bearing arrangement Adjustable bearing (elastic preload, rigid preload; with spacer ring, through mounting shims) Speed: constant, varying (inner and outer rings) acceleration, deceleration or hysteresis Loads: shaft/radial, combined load, overturning moment constant, varying (mixed) oscillation (acceleration , amplitude) centrifugal force point load, circular load (which ring rotates?) Fitting parts: shaft mating surface, bearing seat mating surface (fit situation) Fasteners (eg: lock nut type, elastic bolts, etc.). Environmental conditions: external high temperature, low temperature special medium (such as: oxygen, vacuum, radiation) static vibration dust, dirt, moisture corrosive medium electric field or magnetic field lubrication: lubricant, lubricant quantity lubricant supply relubrication cycle last relubrication Date/Last oil change date Characteristics during maintenance of other machine parts (structural measurements, welding) equipment failures due to other machine parts (e.g. seal damage, oil leakage) transport distance and mode of transport of the equipment or bearings, packaging if bearing monitoring equipment is available, from Monitoring records and charts for bearing monitoring equipment.