FAN DE BEARING LOOSENESS

Are the bearings sleeve-type with a compression bolt on top of bearing housing? If yes, then try tightening it to recommended torque value while monitoring vibration spectrum. If bearings are ball/roller-type, then check tightness of bearing housing and base bolts. Are there any indications of vibration increase in axial/thrust direction? What is fan HP? What is maintenance history? Plan for bearing repairs to prevent consequential damage to bearing housing and shaft.

Walt

Hello sir,

Happy to hear from you

It is a 225KW motor driven, consists of roller bearing with adapter sleeve. Axial readings were mostly constant with 4.0 mm/s vibration. Bearing replacement was done 2 years back and 6 months ago lock nut tightness verified. Nothing was done apart from this.

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