compatible grease for Polyrex EM
compatible grease for Polyrex EM
(OP)
Hi all!
We have just received a 450 HP Westinghouse motor that has Polyrex EM grease as the lubricant for it's bearings.I would like to get a compatible grease for this motor, any thoughts on how to begin, or is that information is already out there , I am only to source it?
Thanks
We have just received a 450 HP Westinghouse motor that has Polyrex EM grease as the lubricant for it's bearings.I would like to get a compatible grease for this motor, any thoughts on how to begin, or is that information is already out there , I am only to source it?
Thanks





RE: compatible grease for Polyrex EM
Google "grease compatibility chart" and you will find a bunch of charts that rate compatibility (based on change in worked penetration) of greases according to their thickener. Sheer stabilized Polyurea is compatible with just about all thickeners (much more so than the non-sheet stabilized).
Even so, those charts have their limitations. There are variations of products within classifications. #1 best approach is to use the same lube. #2 is to have the two greases you want to mix tested for change in worked penetration. #3 is to use the charts, which again will tell you the Polyrex EM is compatible with most greases.
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RE: compatible grease for Polyrex EM
If you really want a specific lubricant in your bearings, you should specify it in the purchase order.
Ken Culverson
RE: compatible grease for Polyrex EM
RE: compatible grease for Polyrex EM
if for one reason or another you need to regrease the bearings frequently, my advice would be to pump out as much of the original grease as possible the first time you do so, to avoid mixing greases as far as possible.
compatibilitycharts on the subject of grease mixing should be read with care: there is a large difference between what can be acceptable in the case of chassis lubrication of a shovel (frequent relubrication, after a few times all the original grease is gone) and when regreasing electric motor bearings where only a few shots of grease may be needed every 2000 hrs or so and where thus various greases may be in intimate contact with each other over a very long period.
i
RE: compatible grease for Polyrex EM
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