We have a blower which is driven by a motor of 49Kw,2960rpm having DE brg:NU315C3,NDE brg:6213C3
In recent days we are getting noise from DE brg,Here I enclosed readings and spectrum for your valuable suggstions for sort out the noise from the DE bearing.When greasing the sound comes down but after 4-8 hrs the noise again coming as before its was greased.The greasing the motor at frequency of 1000 running hrs for DE& 2000 hrs for NDE with “Esso Unirex N3” ( 35 gram)
The motor was put into service on 16.02.2012.Blower is a belt driven arrangement.
mm/sec "g"(acc) mm/sec "g"(acc)
Hori 4.13 64 2.21 76
Vert 5.85 85.16 - -
Axial 4.86 64.2 - -
Your detailed explanation will be highly appreciable