I'm trying to find out the equivelant of the old Socony-Vacuum Gargoyle Grease BRB No.3. This is recommended for the bearings on a jaw crusher and I'm wondering if there's anything that is comparable, or if there's something special about that particular grease?
Thank You,
John

What is the make and model of the crusher?

I know that Cedarapids Inc has updated their recomendations for their crushers.

Most companies can provide you with updated recommendations if you contact them with the Make Model and Serial numbers.

You can also try your lubricant supplier in your area, they should be able to cross most older products into newer products, or work with you to try some greases out to see what will work best for your equipment.

Hope this helps you out.

Allan Zieser

John,

Do you have any literature on the crusher? What type of bearing is it, make and model, and how is the bearing being used. I have worked on a large mechanical press, 2500 tons, which uses a 50,000 # flywheel to drive the main gears. In doing research I discovered that the original grease recommended was not necessarily the best grease currently available for the application. Depending on the age of the equipment, there may be a better grease for the application. Greases are being constantly developed and improved. What was good ten years ago may not be the best now. I would start with your OEM and then move on to the bearing manufacturer to determine if the grease recommended originally is the right one. The only thing I would caution you on is that you should always consider the compatibility issue prior to changing greases. I always tell our techs to consider ALL greases as incompatible unless they have been tested. Hope this helps. Good luck.

Hi John,

Like Marty and Allen mentioned: it would help if you have some background on the crusher. I've got a lot of OEM info on crushers, so maybe with this information and the expertise of the users on this forum we can give you a suitable advice!

greetz!

Hi John,
Can you please provide some basic information such as O.D of bearing in milimeter and it's r.p.m. What is the temp range it is subjected to. What type of loading condition it is subjected, I assume it is a shock load application. Any contaminant ingress or water ingress etc. Or any other information;
Based on these informations I can suggest you a set of specification of a grease which may be suitable for this application.
Please note O.E.Ms are master of making their machines and lubricant is not their cup of tea, it is only tribologists who suggest the best lubricant for their m/c. I fully agree with Marty with the age of the m/c there are better greases in the market for these applications, only thing is that proper selection should be made with great care alongwith compatibilty issue in our mind.
Regards
Dipendra Jha
dctex04@indiatimes.com

quote:

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Originally posted by Dipen:
Please note O.E.Ms are master of making their machines and lubricant is not their cup of tea, it is only tribologists who suggest the best lubricant for their m/c.

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As a tribologist I always find the OEM info very informative to base my recommendation on.
Not all manufacturers are stupid regarding lubricants. The variety on OEM oil specifications is the proof of this! A lot of manufacturers have tribologist as employees!

No offense by the way.

I think Dipen was basing his experience to India only

Absolutely correct, Arupanjan.
We are riding on same boat, nice to hear you on forum as an active member.
Regards
Dipendra Jha

quote:

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Originally posted by Arupanjan:
I think Dipen was basing his experience to India only

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John
I assume Mobil Gargoyle Grease B is the same grease and consists of calcium thickener NLGI 3
and mineral oil of 20cSt @40C
Drop point is 90 C

The oil viscosity is a bit light but maybe your bearings speed is high.

This grease culd be an alternative
Castrol PH Grease
calcium thickener NLGI 3 and mineral oil of 40 cSt @40C
Drop point is 91 C
This grease also contains zinc oxide

Sorry for being so tardy in getting back to all of you. Thanks for the replies!
The maximum rpm for the shaft is 250. I'm sure the forces are tremendous, although I can't say just what they are.. let's just say that it will take a 10 inch rock and in just a few bites, make it 3/4 of an inch..
The OEM is somewhat non-commital. They recommend that I use "the modern equivelant" of the original recommended grease.. yet wont say just what this is.
There are 4 large double roller bearings, and minimal seals on the shaft. The seals are to keep the big chunks out, and the grease also carries alot out. OEM recommends 1/2 pound of grease pumped into each bearing every 16 hours, and 1/4 pound of grease pumped into the thrust surfaces every 8 hours.
In talking to the local operators, they are all using a #2 moly EP grease and having good luck. I'm guessing that I'll be ok going with the same... It gets greased every day with me operating it.. lube is cheap in comparison with the damage done from lack of the same.
Again, thanks for the responces, and I hope this will be able to help some of you make more recommendations.
John

Mobilgrease BRB No3 was based on a soda thickener with a low viscosity mineral oil (35 cSt @38C/100F). The penetration details suggest the grease was an NLGI# 1.5 (despite the misleading name)

As suggested by other members, a multipurpose NLGI 2 grease with moly would seem to be a reasonable recomendation.

Dear John,
Looking at details given by you I would suggest you to use a grease NLGI Grade 2 or 3, having higher base oil viscosity(nearly 400 cst at 40 deg. centigrade) because it is heavy loaded application with minimal selaing arrangement. The grease should contain nearly 3% of moly to take care of load and shocks, you may check for four ball and Timken test for comparision. Prefer synthetic base oil for the application.
I hope you may decrese frequency of greasing upto certain extent and save bearings at the same time by using this type of grease.
Regards
Dipendra Jha

The most important thing is that we have to select a grease from the availibility in the place.
DN factor is covered up hopefully and weld load of 400 kg or 4000N, wheather its moly or not I dont care, as a user, as long as I get that weld load, and Mineral oil with Li complex as the compatibility is a factor and sealing of dust and dirt is an issue, should work
regards