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How do I read and interpret lubricant ISO cleanliness codes?

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The ISO 4406 classification system was initially developed for hydraulic oils as a way for quantifying the contamination of an oil sample. ISO cleanliness codes give a three-numbered "score" for the cleanliness of a lubricant - these scores are widely used across industry as a standard measurement. Understanding how to read and interpret ISO cleanliness codes are an essential skill for any mechanical engineer, fitter, or lubricant technician, and this video explains how to do it.
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Опубликовано:

26 авг 2024

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Комментарии : 13

@user-bc9yt1kf1g 7 месяцев назад

Hi Nice Video...I am watching from India. And I am working in Sales and Marketing to promote our lube oil testing services. This video is very useful for me. Thanks...

@jamesmcallister458 3 года назад

Hi Rafe, this was an excellent explanatory video. There are two areas that perhaps could have been explained in more detail. The first, is that the number of particles are as found per millilitre (ml) of fluid. The other comment was that it is possible to have a repeating number such as 20/20/16, they don't have to reduce each category - however it is uncommon. When you do see a digital particle counter displaying a repeating number such as 20/20/20, it is likely reading in error, as not all particles in the 4, 6, 14 μm range will fall into that same band.

@LubricationExplained 3 года назад

Thanks James! You make excellent point that yes, number of particles could be decreasing but all within a single ISO code. Next time I do a particle count I'll have to point that out. And the 1mL thing is a good point too - can't remember if I cover that in the particle count video or not.

@patelikram2898 2 года назад

Great video !! Clear explanation ! I think one point that was missed in video. It was a sample size for classification. I read somewhere that this table gives a number for 100 ml sample. However in laboratory we do test on 1 ml sample and then extrapolate it and compare with table. I request you to share your views on this.

@brianmezieres61 Год назад

Very impressive and knowledgeable

@LubricationExplained Год назад

Thanks!

@lesliedsouza4077 3 года назад

Good Show, Sir :) Yes, for hydraulic oils. In Western Australia - Similar reports for Auto Trans oils. But they specify number per category? For Engine Oils - There's PQI. (Yes, also the other known things) Seems PQI picks up, magnetically, particles > in size, than what ICP can detect?

@LubricationExplained 3 года назад

Yes! In fact we're planning on doing a future video on PQI, and how to interpret this test alongside standard ICP Iron. In short - PQ measures the total amount of ferromagnetic material in the sample, but can't distinguish size - if you placed an Iron bar in an oil sample, the PQI would be very high even though there is only one "particle".