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post #1 of 5 (permalink) Old 02-11-2014, 11:08 PM Thread Starter
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Interesting info

Interesting info I came across on penetrating oils. I have never liked WD40. It isn't really a penetrating oil, and leaves a brown varnish like residue. It works good for what it was designed for, displacing moisture. (the WD stands for "water displacing")
I have used Kroil for years, but it looks like the "home brew" is the best!

Penetrating Oils

Machinist's Workshop magazine recently published some information on various penetrating oils that I found very interesting. Some of you might appreciate this.
The magazine reports they tested penetrates for break out torque on rusted nuts. They are below, as forwarded by an ex-student and professional machinist..

They arranged a subjective test of all the popular penetrates with the control being the torque required to remove the nut from a "scientifically rusted" environment.

*Penetrating oils ........... Average torque load to loosen*

No Oil used ................... 516 pounds
WD-40 ...................... ... 238 pounds
PB Blaster .................... 214 pounds
Liquid Wrench ...............127 pounds
Kano Kroil ..................... 106 pounds
ATF*-Acetone mix......... 53 pounds

The ATF-Acetone mix is a "home brew" mix of 50 - 50 automatic transmission fluid and acetone. Note this "home brew" released bolts better than any commercial product in this one particular test. Our local machinist group mixed up a batch and we all now use it with equally good results. Note also that "Liquid Wrench" is almost as good as "Kroil" for about 20% of the price.
Steve from Godwin-Singer says that ATF-Acetone mix is best, but you can also use ATF and lacquer thinner in a 50-50 mix.

*ATF=Automatic Transmission Fluid
____________

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post #2 of 5 (permalink) Old 02-12-2014, 12:01 AM
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Good find, Thanks..I am surprised that liquid wrench beat out PB Blaster, As I have used both for years, PB Blaster seems to be the preferred rust buster around these parts, I will give the Liquid wrench another try. Atf/Acetone would be easy to mix and have ready in a spray bottle, the Kroil I don't see , gonna have to look for it now. Interesting.. As I am a Hydraulic Field service Technician and use these sprays all the time.. sometimes with a little heat..Been buying PB Blaster for 25 years by the case and it works, But the salt is mild to wild here in NC. Gonna for sure give the others a try..Thanks for the info

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post #3 of 5 (permalink) Old 02-12-2014, 10:25 AM
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Interesting info.....let's mix up a batch and package it up.....call it "scr-oil" ......I'm already seeing the marketing campaign.....


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post #4 of 5 (permalink) Old 02-12-2014, 11:03 AM
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ATF + Acetone
Call it TransTone.


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post #5 of 5 (permalink) Old 02-12-2014, 02:57 PM
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Curious, was that synthetic ATF or conventional? I ask because synthetic oil by nature is very "capillary" and finds its way to places conventional oil just doesn't.

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