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In the Forum: Analog Playback
In the Thread: Copper Mat on a Micro Seiki Gun Metal Platter
Post Subject: Lab resultPosted by measet on: 11/12/2017
Hello Guys,
Here is the lab result, is in Hungarian but all data it speaks for itself.
It is mentioned that the oil contains Pb as main anti-wear additive what MOL company doesn't apply from 20 years.
The kinematic viscosity is 37 mm2/s, so it can bi fit to ISO VG 32-46 standards.
It is contaminated heavily by few elements and the wear pollution is very critical (see in red Cu, Fe and Mn).
Of course I described all background info to lab engineer (very kind and willing lady) and she pointed me out that condition of this lubricant is very harmful to the bearing system and the immediate replacement is needed.
She advice me an oil for cleaning (MOL Hydro HLPD 46 AL KM) and another extra fine one for final use (MOL Hydro 46 Al Extra) which has perfect anti-wear properties also in case of low rpm.
Both oil looks quite thick but as I got small bottles I did a try. The turntable runs smooth but has got the stable speed later then before and even later when I mounted the thread. I do not have any arm installed now so I coudn't make audition.
My oppinion is the same like Jam has, better to use a bit thinner oil, maybe ISO VG 32 would be perfect.
If you would like more info just let me know, if needed also I can forward further questions to the lab.
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