Re: Lube Oil Type interchange

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Dear folks,

We have a supply problem of lube oil right now for a motor lubrication. Motor has self lubrication system (with the lubricating ring) not pressurized lubrication system. Recommended Oil is ISO VG 22 SAE but we right now have Shell Turbo 32. Motor is with journal bearings and 3000 rpm.

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Registered Member

the oil you have is a bit more viscous (32 vs 22 mm2/s at 40 deg C). it may be quite possible to use the thicker oil, but there are two things to watch out for. one is a higher operating temperature, because of the thicker oil, another is a difference in oil supply because of the change of viscosity, which may also lead to higher operating temperature. so, after changeover, watch for a higher then normal operating temperature. if it is not excessive (say 15 deg or so) you most likely will have no problems.

6/29/145:49 AM

Registered Member

I would do an evaluation of the 2 oils viscosity at the expected operating temperature ranges and compare additive packages. Most sleeve (journal) bearing will do fine with 32 weight turbine oil. What are the motor details?

8/1/148:35 AM

Registered Member

Use Google and search for a paper titled SLEEVE BEARING DESIGN FOR SLOW SPEED APPLICATIONS IN CEMENT PLANT. It's a PDF but of note is recommendation #1 on page 7 which essentially says not to change lubricants without checking to with the OEM.

8/2/145:56 PM

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