sugar mill grease | Noria Message Boards

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hiramMember

Hello Everyone,

I am looking at an application at a sugar mill. I have three options. One is an oil and the other is a grease and the third is a grease but more specificaly its a OGL

my question has to do with the viscosity values listed on the TDS of the 3 products in question. Obviously the oil uses polymers (PIBs) to achieve the high viscosities of 16000 cSt. From what I understand is that under heavy loads the molecular chains of the PIBs break down which decreases the viscosity of the fluid thus consuming more lubricant to avoid trouble.

The grease is a NLGI 1.5 and lists a viscosity of the base oil @ 1500. Add to the fact that its a grease then you will have a tenatious film similar if not better than the oil listed above.

The third is the OGL which lists a viscosity of the base oil at 37900 cSt at 40deg.

Isnt the max viscosity of a base oil at about 1500? Now arguably the OGL is an excellent choice but the way the data is presented is misleading which makes comparison difficult.

other properties that are important is EP and 4 ball scar values.

any other thoughts?

thanks in advance from Puebla Mexico

Hiram

1/11/123:51 PM

Original Post

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hiramMember

sorry this should have been posted in industrial lubrication

nurudinMember

great,

so, what happend?

rttechMember

Hi Hiram, if you can monitor the used grease by ferrogram you will be able to "dial in" the best grease type and reapplication period from the increase and or decrease in wear, usually the heavier viscosity fluids with solid boundary lubricantion will work the best, the 37,000 cSt may be a polybutene base fluid cut by solvent for application and if so we have in past had good success with the polybutene base fluid solid boundry combination,
regards
Rob S

1/29/1210:22 PM

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