rockbrain
Cave Dweller 
Member since January 2022
Posts: 3,172
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Post by rockbrain on Jul 4, 2023 9:40:04 GMT -5
I've been disposing of a lot of oil at work that I suddenly realized (not sure why it took me so long!) might be perfect in the saw. It's vacuum pump oil and I change it out pretty much every time I do a pump down of a an AC unit. I probably have 15 gallons right now and it accumulates pretty quickly. When it comes out of the pump it looks brand new. Anyone see any issue with using this. On the container it says it is extremely pure and non-detergent. It also says it is hydro processed, meaning it goes through a series of catalytic steps rendering the oil extremely refined. It has no additives. I think my containers say ISO 32. The one I just looked up says ISO 41. Anyone see any reason why I shouldn't use this in a 24 and 16 slab saw?
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NDK
Cave Dweller
Member since January 2009
Posts: 9,440
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Post by NDK on Jul 4, 2023 11:24:11 GMT -5
Here's my opinion and it's worth what you paid for it 🤣 I've read where people use just about anything they can in a slab saw. Everything from antifreeze to diesel fuel to used transmission fluid. Personally I have 303 hydraulic oil in my 16" saw. The little bit I use it (hasn't ran in over a year) I'm not worried about any health concerns. If this pump oil you're getting is thin enough it's completely up to you to try it. Would probably be an upgrade for my saw. I know Rockoonz has much good info on saw oil, so hopefully he'll chime in and put me in the corner where I belong 😉 |
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rockbrain
Cave Dweller
Member since January 2022
Posts: 3,172
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Post by rockbrain on Jul 4, 2023 14:25:10 GMT -5
After doing a little more research it appears the vacuum pump oil is heavier than would be recommended. ISO and CST seem to be pretty close to each other. HP Cool Cut is 5-7 CST.
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Post by Rockoonz on Jul 4, 2023 19:07:00 GMT -5
ISO is the same as 40c cSt from what the charts say. Ideal for a saw is under 12 cst, which is about unobtanium nowadays, the Stellar Lubricants oil I use is probably about 17 or 18 fresh out of the pail, and it seems to thicken up after filtering. I should get a zahn cup, ummm, nevermind just looked at Amazon, maybe someday I'll be at a paint shop going out of business sale. So I'll guess that the filtered many times stuff is in the low 20's. The veterinary laxatives start out around 20cSt, so even thicker. Pretty sure HP lies about that viscosity, that's about as thin as diesel and would have an unacceptable flashpoint without also unacceptable additives. Oh, wait, they are tesing at 100c, not 40c I bet. rockbrain since you already looked it up, check which it is, if 100c it is even a little thicker than your ISO32 and I think I heard that somewhere, but age has thickened the viscosity of my cranial fluids, so who knows?!? |
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Post by Rockoonz on Jul 4, 2023 19:25:14 GMT -5
So that was a lot of words to not answer your question.
My opinion is if you can use it and it will lubricate and cool good enough, and you may get less mist than the rest of us. The possible downside will be removing the oil from your slabs. The club shop used the cheap AW68 tractor oil for awhile when the free transformer oil became unavailable (post pcb's) and it reportedly took baking to remove it completely.
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rockbrain
Cave Dweller
Member since January 2022
Posts: 3,172
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Post by rockbrain on Jul 4, 2023 21:03:15 GMT -5
Thanks Rockoonz. I didn't think it would be any harder to get off the slab than the horse laxative. The vacuum pump oil is mineral oil. |
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Post by Rockoonz on Jul 4, 2023 22:18:32 GMT -5
rockbrain I think you are right, pretty sure the additives in the hydraulic and transmission oils that some use are far worse of a problem.
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vwfence
has rocks in the head
Member since January 2013
Posts: 566
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Post by vwfence on Aug 1, 2023 9:40:41 GMT -5
If you are in the right area , Mag -1 drip oil for irrigation use is like 96 % mineral oil . i have used it for about 10 years now with good results .
Also if you know the right people with your power company , the oil in the transformers is mineral oil and they drain them out to ship them back for rebuilds . you mayy have to sign a waiver to get them give it to you
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rockbrain
Cave Dweller
Member since January 2022
Posts: 3,172
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Post by rockbrain on Aug 2, 2023 21:54:44 GMT -5
I already possess the vacuum pump oil. It's 100% mineral oil and I've been disposing it. I was just wondering about the weight or viscosity of it.
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Post by Rockoonz on Aug 3, 2023 2:30:21 GMT -5
Mineral oil is petroleum, comes from the same crude oil as everything else, oil from both parafinic and maphthetic bases are called mineral oil, but the term is meaningless. We could call fuels Mineral gasoline or mineral diesel and be just as accurate. Just a name.
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