Searching for an odd machine oil. Assistance.

[HondoMan]

Right then,

we recently purchased a Pfaff 335 H3 sewing machine.  This is a massive learning curve for us who sew by hand, but we are making progress.

The topic of oil rose it's head during the learning phase.  The machine handbook, albeit is 40 year old, states, "Only use oil with a viscosity of 41,4mm2/s at 20° C and a density of 0,84kg/dm3".

We have tried to find oil with this viscosity but are not having luck.  As we are in Germany, we asked a German forum - no joy.  This machine needs oil often , so we are hoping to find something quickly.

Thank you all in advance.

Cheers!

[HondoMan]

If you don't understand the numbers, then why bother with an answer lad?  SAE 30 motor oil has a viscosity of 271mm2/s at 20C.  Defo not the correct oil.   Motor oils are utterly different from sewing machine oils or any other.  An equivalent to sewing machine oil is mineral oil.  I would no more put motor oil in a sewing machine than I would sewing machine oil in a car. 

[nejcek74]

If I remember right the temperature/viscosity dependency this one should be around your values:

https://www.tsmoly.com/oils-sewing-machine-p-231.html

but better ask them.

useful online calculator

https://fluidpower.pro/temperature-viscosity-chart/

And I would evaluate what it actually means to use a certain viscosity of sewing machine oil in my application. Because it is very different from industrial production where machines are running 8 hours a day at high speed. I use Spirit2 in all my old Pfaffs, which has lower viscosity, but I guess it's ok as I never run machines on full production speed. (I know, assumption is mother of all f*** ups)

https://www.spirit-spray.com/spirit-2-vaseline-oil/cat/k-2002053/

 

[kgg]

2 hours ago, HondoMan said:

I would no more put motor oil in a sewing machine than I would sewing machine oil in a car. 

Funny thing I NEVER use sewing machine oil in any of my machines. I use a formula of synthetic motor and synthetic transmission oil. If I am flushing a old machine out I use a formula with more transmission oil to get into the bearings and remove any dirt/ etc. I find the synthetic oils lubricate surfaces much better, reduces friction and quiets a machine down particularly an old machines. A old sewing machine mechanic who worked at a factory where machines were used 24 / 7 used straight transmission oil to keep the machines cooler so they could keep up with the sewers.

To answer your question an oil at your spec is similar to 5W oil at 20 C based on the chart ( https://imgur.com/DDA5MJW )

kgg