I understand...Lack of allowance for axial expansion coupled with loss of lubricating properties of the grease at low temp. has definitely contributed to the failures.
Quote from SKF Manual :
'when operating temperatures are below 40°C for longer periods,the grease life is shortened because oil...
Sorry - Was out of loop for a v.long time.
If its not too late I want to thank each and everyone of you for your inputs - duly copied and applied!- Learnt a lot too..
The bearings have been ok?' since mounting 2 months back but we monitor it - just in case.
Just so that I do not leave any...
It is a horizontal shaft,but the pillow block is bolted vertically.
Sorry for not being too clear,this other photo - its clearer,panorama.http://files.engineering.com/getfile.aspx?folder=3c3a726e-02a6-4c87-8dae-3290dad7c38b&file=DSC04031.JPG
Thank you all for your answers.
Fan RPM = 1086,27000cfm
Weight = unknown,looks real heavy.
Yes,it is the drive end bearing that fails[we change both bearings then]
Vib measurements are not being done currently,the units are relatively new,only 2 years.Theres no allowance for axial...
-Ball bearings,the kind with seals at both sides.
Grease port on top of the pillow block.
New grease is apply till little of the grease appears at the seals.In this way we're sure that its not over/under greased.
The grease was indeed contaminated by the failed parts when the failure was...
Greetings to all,
We've had bearing failures on our HVAC air blowers sometimes catastrophically.
The bearings are encased in plummer block,which is bolted onto a vertical support.Can this kind of loading contribute to failure?Should the pillow block be mounted on a horizontal support instead...
