1-Typical grease density? 2- Slinging grease from coupling

[electricpete]

==================Part 1 ========================
I have always assumed that grease was similar density to water... i.e. one ounce-volume of grease weighs one ounce-weight at room temperature.
I just saw coupling manufacturer's catalog which gave grease capacity as:
Weight = 0.5 pounds
Volume = 1 1/8 pint
By my calculations this means 8 ounces of weight = 18 ounces of volume or specific gravity of grease is 8/18 ~0.45 relative to water.
Question 1 - Is SG-0.45 reasonable? What are typical values?

=====================Part 2=====================
We have experienced slinging of grease from a Lovejoy Sier Bath continuous-sleeve flexible gear coupling 3 1/8" max bore 1800 rpm.
I am trying to determine whether the amount of grease slung is excessive. We went back and were able to add 5 ounces of grease before grease came out of the opposite port. Depending on conversions, that means we had either 8-5=3 ounces or 18-5=13 ounces of grease left. Plenty left to lubricate for the time being I'm sure but is this much slinging normal? We are using Mobil EP111 coupling grease... seems to me like a very thin grease.

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[Tmoose]

I bet you already looked here -

http://www.mobil.com/USA-

Curiously they don't list the density for ep 111

http://www.mobil.com/USA-English/Lubes/PDS/GLXXENGRSMOMobiluxEP111.asp#TypicalPropertyTitle

This other stuff is ~ 0.8
English/Lubes/PDS/GLXXENINDMOMobilarma_Double_Letter.asp#TypicalPropertyTitle

----------------------
time for a floatation test.

If the coupling gets warm I'd kind of expect pressure to build up, and cause a certain amount of purging.

 

[electricpete]

Thanks Tmoose.

I was able to find the msds for Mobilux EP 111 by searching here

http://www.host1.exxonmobil.com/psims/psims.aspx

Then it comes up with a long page... word search on that page shows SG~0.95.

I am pretty darned sure 0.8 - 1.0 is a normal range for coupling greases and I just can't figure out why they put in a weight and volume which correspond to 0.45 SG.

We found out by talking to the vendor and looking at the literature that the coupling has two rubber type seals. I'm thinking an inspection of those during next shutdown would be a good idea.




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