Are there any good guides or references beyond individual manufacturers' recommendations regarding motor bearing lubrication (greasing) intervals? Web links are desired, of course. Thanks.

I have this :

Lubfreq.jpg (90 Kb, 70 downloads)

That's gud Mig. How does the graph changes with temperature? At what temp the graph was drawn? I like to read more if I know the source.

This message has been edited. Last edited by: Josh,

Looks like a SKF source.

The source is :
- Hydrocarbon Procesing Magazine from July 1991 page 27.
- The graph has attached :
"Fig. 1-Relubrication interval (Courtesy SKF Industries, King of Prussia, Pa)"
- Thesection of the magazine is :
HP in Reliability and the article was written by Heinz P. Bloch, Contributing Editor.
-Excuse me for the bad quality attached graph but this is the only wich I have.
-When you find more information please post it.
-Questions : Is King of Prussia, Pa the name of a location? , Where is that?

This article provides a summary of greasing recommendations in EPRI NP7502. t

http://www.machinerylubrication.com/article_detail.asp?...okgroup=Lubrication2

(follow the link for Table 1)

I think every motor manufacturer, every bearing manufacture has recommendations. Also you can find recommendations from EASA and many other places.

Here are more recommendations from EMS = Electric Motor Servicecenter (you may need to register with email address and password to get access)

http://www.emservicenter.com/EMSUniversity/grease_relubrication_intervals.cfm

Pete in your first article:

quote:

The problem of overgreasing electric motors was first identified in the nuclear power industry in 1988

and

quote:

Figure 10. The plunger drain plug opens the center plunger on 1 to 5 psi to purge excess grease and pressure. (Right)

The reference to Alemite fittings was what I was looking for a long time. I have met them on oilfield equipment. http://www.devcocorp.com/american/alemite.htm

When I started I was working on portable drilling rigs and was familiar with the alamite plunger drain fittings on hoisting drums, catheads and other rolling components.

I have searched for these plunger drains in vain on electric motors.
Also have seen motors full of grease, because the escape path was blocked. This happened on an electric motor that was 9 years in service, which supports the theory that the cavity should be packed only by 50% with grease.