edcantu9
Well-known member
I used thread loc on nyloc nuts. Was this a big mistake?
Do I need to replace hardware?
Do I need to replace hardware?
I used thread loc on nyloc nuts.
- Thread starter edcantu9
- Start date
sdguy55
Well-known member
No need to replace it. Just a little more added security to a nut that was built to be added security
Belt and suspenders.
MadMechMaster
Well-known member
Some threadlockers will dissolve/react with some plastics. you should see this rather quickly. You should be able to check this for the grade you used.
Anyways, you have some threadlocker on the threads, and that should be enough.
Anyways, you have some threadlocker on the threads, and that should be enough.
nehog
Well-known member
So you have a little redundant extra additional security.
kams1973
ALLIANCE MEMBER
You should drill it out for a cotter pin or safety wire as well.
sdguy55
Well-known member
Even if it does its not a big deal. You still have the threadlocker
LOL, Sorry but I found that funny coming from a guy in an urban area like LA in Southern California. Generally only the older skinny farmers do it around here.
To the OP, you should be fine. If you want the extra protection, next time I might suggest some clear RTV.
pepi
Well-known member
I am surprised it even had any affect, did you try to remove the nut? As said above it would dissolve fairly fast is it was going to.
JakeKohl
Well-known member
It's not a big deal. The loctite will reduce or eliminate the nylock's repeat use but it won't affect the ability of the nut to stay on until it is removed later. Most of the loctite affects on plastics is not a chemical reaction but issues related to the additional pressure the loctite adds when it cures - it tends to crack/relieve the plastics. We used to have a lot of issues with this on lexan guarding on machinery I used to help design/develop. Our assembly guys would think they were taking on extra thorough preventative step by adding loctite to the nylock hardware that held the plastics in place - but it would make the guards crack at the bolt holes some time later.
Kevin54
MEMBER EMERITUS
A fellow worker when I was in the Toolroom made a 1.2" thick Lexan cover and he didn't want the bolts to loosen up. He used Loctite on all of the screws. Went to lunch, came back a half hour later and the Lexan was all split everywhere. No one would have noticed it other than it was clear Lexan. I was really surprised it did that. BTW, is specifically states on the bottle that it will react with certain plastics.
Kevin C
Well-known member
I have never seen a reaction between Loctite and nylon. As others mentioned, polycarbonate ( Lexan) and Loctite is a really bad combo.
Even glass filled polycarbonate will crack and disintegrate.
Even glass filled polycarbonate will crack and disintegrate.
JakeKohl
Well-known member
I spent some time researching that and some documents I found on the Loctite site pointed to the expansion of the thread locker with plastics leading to cracking...who knows.
Kevin C
Well-known member
Actually I do....
I have been using Loctite for a really, really long time. I also used to design optical encoders with plastic lenses. If you get oil from your fingers on the lenses and expose them to heat and humidity your a lot more likely to get cracking. Sunscreen will do the same thing. Get them near Loctite and they will run away screaming.
Two months ago a little bit of Loctite spilled from a container and left a wet film on the bench. A plastic foot of the test instrument got a tiny bit of Loctite on it from sliding across the bench. Three weeks later the plastic was crumbling.
Same thing happened to the glass filled polycarbonate housing I designed for optical encoders that were held down with loctited screws. Nice stress cracks in the plastic from being attacked by the thread locker.
Don't get me wrong, great product but you have to understand its limitations.
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Modifieddriver
Well-known member
Will self destruct in 10 seconds. Stand Back.
JimVonBaden
Well-known member
No, the nut will not fall off. However, when you remove it you will need to replace it. Nylocks are designed to use the nylon to hold the nut in place. That nylon is likely useless for this now. Once the threadlock is broken loose, the nut will never be any good without threadlocker again, and there is some concern as to what the interaction of the nylon with the threadlock will be.
Personally, unless it is a non-critical part, I would probably replace the nuts. But I am **** like that!
Jim
Personally, unless it is a non-critical part, I would probably replace the nuts. But I am **** like that!
Jim
Fueler
Well-known member
And don't forget to tack weld it.
Then double nut it.
JasonMcElroy
Well-known member
Take the nut back off and cross-thread it on there REAL good in addition to the other suggestions.
That'll hold it good!
All jokes aside, I use 243 on nylocks all the time on my motorcycle.
Jason
That'll hold it good!
All jokes aside, I use 243 on nylocks all the time on my motorcycle.
Jason
Kevin C
Well-known member
I have never seen an interaction between Loctite and nylon.
learn something new everyday.
dmeadow
Well-known member
Reminded somehow of a Stephen Wright quote:
"I put instant coffee in the microwave and almost went back in time."
"I put instant coffee in the microwave and almost went back in time."
retrobuilder
Well-known member
the solvents in threadlocker should not affect the nylock nut lock. Ny stands for nylon. while not impervious to some solvents and acids you should be fine. just do not use a threadlocker to strong a bond for small fasteners. also a great way to use nylocks used many times where the plastic friction fit wears down..
Kevin C
Well-known member
http://www.coleparmer.com/Chemical-Resistance
Handy chemical resistance look-up table. Unfortunately the don't list Loctite. I was able to conform that nylon is compatible with mayonnaise as well as gasoline. Its not very good with hydrofloric acid.
BTW... I found this on Loctites Q and A site:
http://au.iloctite.com/en/anaerobic-adhesives-threadlocking-gasketing-and-retaining
Handy chemical resistance look-up table. Unfortunately the don't list Loctite. I was able to conform that nylon is compatible with mayonnaise as well as gasoline. Its not very good with hydrofloric acid.
BTW... I found this on Loctites Q and A site:
http://au.iloctite.com/en/anaerobic-adhesives-threadlocking-gasketing-and-retaining
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