Penetrating Oils – Ian Couch

Penetrating Oils – FYI from Ian Couch.

Machinist’s Workshop Mag recently published some information on various penetrating oils that was 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

    Be aware that Acetone is extremely flammable and should be used and stored with extreme caution