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Thread: OT - Penetrating Oil

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    ISIT_RUSTY is offline Plastic
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    Default OT - Penetrating Oil

    In a thread in the antique machinery forum, there was a discussion what to use to free up a part. Southbendmodel34 had mentioned a study in Machinist Workshop stating that Automatic transmission fluid and Acetone mixed was the best.
    I just received a newsletter today from Tim Carter mentioning the same study. He had included the results of the test, which I thought interesting.

    A study done by Machinist's Workshop magazine in their April 2007 issue looked at different penetrating oils to see which one did the best job of removing a rusted bolt by measuring the pounds of torque required to loosen the bolt once treated. If the study was scientifically accurate, it turns out a home brew works best!
    Here's the summary of the test results:

    Penetrating oil ..... Average load

    None ...................... 516 pounds
    WD-40 ................... 238 pounds
    PB Blaster .............. 214 pounds
    Liquid Wrench ...... 127 pounds
    Kano Kroil ............. 106 pounds
    ATF-Acetone mix....53 pounds

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    hickstick_10 is online now Stainless
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    Quote Originally Posted by ISIT_RUSTY View Post
    In a thread in the antique machinery forum, there was a discussion what to use to free up a part. Southbendmodel34 had mentioned a study in Machinist Workshop stating that Automatic transmission fluid and Acetone mixed was the best.
    I just received a newsletter today from Tim Carter mentioning the same study. He had included the results of the test, which I thought interesting.

    A study done by Machinist's Workshop magazine in their April 2007 issue looked at different penetrating oils to see which one did the best job of removing a rusted bolt by measuring the pounds of torque required to loosen the bolt once treated. If the study was scientifically accurate, it turns out a home brew works best!
    Here's the summary of the test results:

    Penetrating oil ..... Average load

    None ...................... 516 pounds
    WD-40 ................... 238 pounds
    PB Blaster .............. 214 pounds
    Liquid Wrench ...... 127 pounds
    Kano Kroil ............. 106 pounds
    ATF-Acetone mix....53 pounds
    I notice kerosene isn't on there, which is a shame since its always worked god for me.

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    wrenchhead531's Avatar
    wrenchhead531 is offline Aluminum
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    what ATF and what ratio? How do you store acetone in a convenient container where you are not sniffing it all day in the shop and it just evaps out changing your ratio?

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    Mike C. is online now Diamond
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    Two stroke oil is pretty amazing, too.

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    Quote Originally Posted by ISIT_RUSTY View Post
    Here's the summary of the test results:

    Penetrating oil ..... Average load

    None ...................... 516 pounds
    WD-40 ................... 238 pounds
    PB Blaster .............. 214 pounds
    Liquid Wrench ...... 127 pounds
    Kano Kroil ............. 106 pounds
    ATF-Acetone mix....53 pounds
    That's very interesting.

    I had always heard that Kroil is the best "product" available, and the results appear to confirm that. ATF + acetone is not a "product" that I know of.

    Thanks for the info.

    - Leigh

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    Quote Originally Posted by wrenchhead531 View Post
    what ATF and what ratio? How do you store acetone in a convenient container where you are not sniffing it all day in the shop and it just evaps out changing your ratio?
    I mixed the two 50/50 in a plastic squeeze bottle applicator from a beauty supply store. The bottle was translucent and I noticed that the ATF settled to the bottom and the acetone floated to the top pretty quickly. When I shook it up they mixed but you could see that it was not homogenous. No evaporation I could see from the small applicator tip.

    I can't report on it's efficacy. I'm using it on a mounting pin rusted in a pair of hydraulic cylinders. 1 month so far, and it's still stuck. I started with Kroil, so far neither has worked. Looks like it's going to need the torch.

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    tdmidget is online now Titanium
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    The so called study did not involve threaded fasteners as I recall. I believe, and correct me if I'm wrong, but it was a press fit. If this witches brew is so good why isn't it in those cans labeled "Kroil" , "PB Blaster", and "WD 40"?

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    Quote Originally Posted by tdmidget View Post
    The so called study did not involve threaded fasteners as I recall. I believe, and correct me if I'm wrong, but it was a press fit.
    The OP said:

    Quote Originally Posted by ISIT_RUSTY View Post
    ...the best job of removing a rusted bolt by measuring the pounds of torque required to loosen the bolt...
    That appears to contradict your statement.

    I've not read the referenced article, so I have no personal knowledge of it.

    - Leigh

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    CalG is offline Titanium
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    how do you know it is not?

    Actually


    According to the MSDS for Kroil:
    1.) Crude oil (Petroleum Base Oil )
    2.) Naptha
    3.) Mineral Spirits (Aliphatic Petroleum Distillate)
    Last edited by CalG; 01-14-2010 at 05:46 AM. Reason: Add MSDS

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    usmachine is offline Stainless
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    Kroil rules !

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    Quote Originally Posted by usmachine View Post
    Kroil rules !
    agreed I also use PB

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    tdmidget is online now Titanium
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    I find the oxy works best..

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    wrenchhead531's Avatar
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    blue wrench is always an option

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    I have had great luck with KROIL on old tractor implement bolts and such. You know the attachments that never get covered up

    Besides I love that Shop-ley smell of KROIL. It'S also alot cheaper than POLO after shave Still stings the same though.


    Don

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    I use both Kroil and PB Blaster, but after seeing that report I think I'll just stick with Kroil once the spray can of PB Blaster is gone.

    I lucked out with the 1 gallon (US) can of Kroil I got. I had bought a hand-built tool kart (a nearly 300-pound beast with 8" urethane-covered cast wheels and 3/8" thick welded-on top) at an auction of equipment from the closed Warner Swasey/Norton grinder facility in Worcester MA many years ago. Inside one of the compartments was this nearly-full can of Kroil I was told be a friend that is was especially good and somewhat hard-to-find, so I've used it sparingly for years now.

    Where's a good source to replenish it?

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    usmachine is offline Stainless
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    Default Buy it from Kano Labs

    I buy mine right from the Mfg., Kano Labs in Tennessee. Once you buy a little they will send you deal after deal to get you to buy more

    I bought a couple gallons and a case of spray cans last year and use it liberally as needed. It's not cheap but it sure does work

    As far as the after shave thing goes I only use it for that when I want to keep SWMBO out of the shop

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    SteveF is offline Stainless
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    Quote Originally Posted by ISIT_RUSTY View Post
    If the study was scientifically accurate, it turns out a home brew works best!
    Unfortunately, if you read the article, it wasn't scientifically valid and the author pointed that out.

    Steve.

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    i_r_machinist is offline Titanium
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    IMPO,
    Kroil is the superior penatrant, but is by far lacking in the ability to help pick up chicks at the tractor pull like a liberal splash of wd40.
    i_r_machinist

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    Kroil is the rats ass. It's probably about the same as the thinned out ATF, but using kerosene. Hard to get acetone/ATF into an aerosol. Nice to know about the ATF and other home remedies in case of a Kroil shortage.

    I didn't see the article, but unless they rusted many, many fasteners in a controlled environment and averaged the results, it probably wasn't very scientific. There must be a huge % of variance considering rust, humidity, bolt tolerances, temperature, application of product, time to penetrate, etc.

    Quote Originally Posted by i_r_machinist View Post
    IMPO,
    Kroil is the superior penatrant, but is by far lacking in the ability to help pick up chicks at the tractor pull like a liberal splash of wd40.
    i_r_machinist
    Now that would really be tough to prove scientifically. Based on my experience with WD40, they were probably loose to begin with

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