quick on-site foaming tendency test?

Read our primer articles on Grease Guns and Oil Sight Glasses.

I remember hearing that we can do a quick qualitative on-site foaming tendency test by filling a bottle half way, shaking vigorously for 5 minutes, and watching how long for the bubbles to disappear.

Does anyone have any links to discussion / guidelines for this type of test? In particular, how long would you think it should take air to settle for new oil? For oil from a sump?

10/29/085:59 AM

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Original Post

rttechMember

Hi electricpete

the easy way is to compare the used oil with a sample of new oil, shake the two bottles, new oil and the used sample simultaneously with same oil levels in the bottles, best in a mechanical shaker if possible, then after stopping compare, if the used oil does not settle as quick as the new oil then most likely best to test as below
krishnakumar menhon, posted this back in 2006,

"Almost all the lubricating oils are incorporated with antifoam agents to ensure that no lubrication failure due to foam formation when it is in service.ASTM D 892 test procedure is to measure this foaming tendency of the oil.This test includes three sequences and each sequence has two portions.

Sequence - 1 at 24°c(sample 1)

Sequence - 2 at 93°c (sample-2)

Sequence - 3 at 24° (sample - 2 again)

1st portion - air blowing period for 5 minutes
2nd portion - settling period for 10 minutes"

Regards

Rob S

11/4/081:43 PM

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