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aslsa.rng(at)gmail.com
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 Posted: Sun Jun 28, 2009 3:09 pm Post subject: Penetrating oils |
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One of the guys in our EAA chapter sent me this for the newsletter. I thought it might me of interest.
Rick
Machinist's Workshop magazine actually tested penetrants for break out torque on rusted nuts.
Significant results! They are below, as forwarded by an ex-student and professional machinist, Bud Baker.
Don't forget the April 2007 "Machinist's Workshop" magazine comparison test.
They arranged a subjective test of all the popular penetrants with the control being the torque required to remove the nut from a "scientifically rusted" environment.
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
The ATF-Acetone mix was a "home brew" mix of 50 - 50 automatic transmission fluid and acetone.
Note the "home brew" was 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 about as good as "Kroil" for about 20% of the price.
[quote][b]
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Sun Jun 28, 2009 3:54 pm Post subject: Penetrating oils |
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Liquid Wrench ........ 127 pounds
Kano Kroil ............... 106 pounds
ATF-Acetone mix.......53 pounds
The ATF-Acetone mix was a "home brew" mix of 50 - 50 automatic transmission fluid and acetone.
Note the "home brew" was better than any commercial product in this one particular test.
Note also that "Liquid Wrench" is about as good as "Kroil" for about 20% of the price.
Rick:
I am a fan of Kroil. It works miracles. My own personal experience indicates it is far superior to Liquid Wrench and PB Blaster.
I do a lot of work on 9 antique tractors, some older than me. 
Makes life a lot easier working on these old babies.
I'll give the ATF/acetone mix a try, but will have to be careful using it in areas of paint and plastics/lexan.
Even though it cost more, I'll stick to Kroil as my primary assistant.
john h
mkIII
[quote][b]
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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slyck(at)frontiernet.net
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| Posted: Sun Jun 28, 2009 5:12 pm Post subject: Penetrating oils |
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I never had much luck with liquid wrench.PB Blaster is superior and Thrust is good stuff too.
-hard to find though.
BB
On 28, Jun 2009, at 7:04 PM, Richard Girard wrote:
[quote]One of the guys in our EAA chapter sent me this for the newsletter. I thought it might me of interest.
Rick
Machinist's Workshop magazine actually tested penetrants for break out torque on rusted nuts.
Significant results! They are below, as forwarded by an ex-student and professional machinist, Bud Baker.
Don't forget the April 2007 "Machinist's Workshop" magazine comparison test.
They arranged a subjective test of all the popular penetrants with the control being the torque required to remove the nut from a "scientifically rusted" environment.
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
The ATF-Acetone mix was a "home brew" mix of 50 - 50 automatic transmission fluid and acetone.
Note the "home brew" was 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 about as good as "Kroil" for about 20% of the price.
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rowedenny
Joined: 09 Mar 2008
Posts: 338
Location: Western PA
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| Posted: Mon Jun 29, 2009 5:41 am Post subject: Penetrating oils |
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[quote]
I never had much luck with liquid wrench. PB Blaster is superior and Thrust is good stuff too.
-hard to find though.
BB
Bob,
I agree, I grew up working on backhoes and dozers as well as old trucks, WD-40 is not really what I consider a penatrating oil and is good for many things but breaking loose rusty bolts aint one of them. We only ever had liquid wrench laying around the shop and before I was 15 I was convinced it was a good for nothing snake oil! Never once did it ever seem to loosen anything for us.
Discovered PB Blaster at work 18 years ago and have found it gives results every time.
I'll have to try the ATF mix some day, right now I am trying to get the exhaust off my JD 950 farm tractor (spun a rod bearing) and PB hasn't loosened it yet.
D Rowe
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slyck(at)frontiernet.net
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| Posted: Mon Jun 29, 2009 5:49 am Post subject: Penetrating oils |
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As you know already they have to soak overnight.Then give 'em a whack with a hammer and drift.
Last resort is oxy-acetylene localized heat.
don't burn down the barn 
BB
On 29, Jun 2009, at 9:38 AM, Denny Rowe wrote:
| Quote: |
| Quote: |
I never had much luck with liquid wrench.PB Blaster is superior and Thrust is good stuff too.
-hard to find though.
BB
Bob,
I agree, I grew up working on backhoes and dozers as well as old trucks, WD-40 is not really what I consider a penatrating oil and is good for many things but breaking loose rusty bolts aint one of them. We only ever had liquid wrench laying around the shop and before I was 15 I was convinced it was a good for nothing snake oil! Never once did it ever seem to loosen anything for us.
Discovered PB Blaster at work 18 years ago and have found it gives results every time.
I'll have to try the ATF mix some day, right now I am trying to get the exhaust off my JD 950 farm tractor (spun a rod bearing) and PB hasn't loosened it yet.
D Rowe
http://www.matronics.com/Navigator?Kolb-List
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olendorf
Joined: 06 Jul 2006
Posts: 140
Location: Schenectady, NY USA
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| Posted: Mon Jun 29, 2009 12:15 pm Post subject: Re: Penetrating oils |
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I've had very good luck with PB blaster. It does seem to work 4 times better if you apply the PB blaster and then heat it up with a propane torch for a minute. Then add a little more PB. It seems like it is heat activated. Just watch it because PB is flammable.
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Scott Olendorf
Original Firestar, Rotax 447, Powerfin prop
Schenectady, NY
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williamtsullivan(at)att.n
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| Posted: Mon Jun 29, 2009 1:04 pm Post subject: Penetrating oils |
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Scott- heaitng it and then spraying probably works because of expansion and contraction sucking the PB in. I used to do it at work. Yup, flammable. Sometimes spectacular. Another way is to wrap it in a rag or paper towel and then saturate with PB. Go for coffee, or come back tomorrow. The more time, the better. Can't rush it.
Bill Sullivan
Windsor Locks, Ct
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