Lubrication question

[Johnwa]

I’m currently dismantling and cleaning my Southbend shaper. The army manual for it specifies Saybolt 200 at 100F.
googling tells me this is equivalent to SAE 20. This seems to be a lighter oil than what our various lathes use.
I can get non detergent SAE 30 and SAE 10 at Canadiantire. Can I blend these together to get SAE 20? Is there an alternative source? The manual says I only need about 1 quart.

 

[Dusty]

@Johnwa, from what little I understand on blending oils it's not just a simple process of 50 -50%, there's a formula somewhere. Consistency of the mix will be critical for accuracy in your shaper. Unsure you would gain that by blended two commercial off the shelf products together. Just saying!

 

[YYCHM]

https://cleanflow.net/products/lubr...MIroGnwvS07QIVow2tBh3tCQyPEAYYAiABEgLUqvD_BwE

 

[PeterT]

Just as background, we discussed viscosity a bit in this post.
https://canadianhobbymetalworkers.c...et-iso-15-or-even-iso-10-oil.1803/#post-18424
And I think more thoroughly in a gearbox oil post but cant find link right now.
Anyways check out the chart & mostly get a handle on your assumed ambient/operating temperature because that is a large influencer of viscosity.


Dusty is right, blended oil parameters can get complicated in a hurry & way outside the scope of what you are trying to achieve. But as a ballpark guess (and assuming 2 identical brand/type/families of oil, just different viscosity ratings) this will probably be sufficiently accurate.
http://www.nimacltd.co.uk/viscosity...o-known-oils-to-achieve-the-desired-viscosity

 

[PeterT]

FWIW, I found a better selection/container size of hydraulic oils at Napa than CanTire but that may have been what I was after at the time.

 

[Perry]

UFA might have something too. (I always forget about these guys but they carry different stuff) I think you might need to drive to Airdre for the closest store.

 

[Dabbler]

you should be fine substituting SAE30 non detergent. no need to get complicated.

 

[kevin.decelles]

you should be fine substituting SAE30 non detergent. no need to get complicated.

Agree with @Dabbler , after having the oilpump out of my Southbend to fix it (put in the ball bearing), the mechanism is so trivial that as long as it pumps, I wouldn't sweat it.

I have 300+ gallons of ISO220 if you want to snag 5 gals. This is what I use in my 'plain bearing' situations, and probably what I would try in the southbend once I get around to changing it.

 

[YYCHM]

I have 300+ gallons of ISO220.

 

[Tom Kitta]

300G? Looks life lifetime supply - at least for me using at most 10g per year.