Please check out attached bearing failure picture. Bearing failed within 200 Hours after replacement.
Equipment: centrifugal pump(Flowserev CPX) for water service
Bearing: SKF 3309 C3(DE) and SKF 6309 C3(NDE)
Bearing Failed 3309 C3
Oil Lubricated Bearing VG 68
Running RPM: 900-1100
Alignment was under range of 0.05mm
Previous bearing life was more than 10000 hours
what could be reason for this failure? Axial/Radial load, Dirt in oil, Bearing manufacturing defects ?
Brief answer is apprenticed