Loctite PRIMER?! Most DIYers Have No Idea
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- เผยแพร่เมื่อ 26 ธ.ค. 2024
- Did you ever hear of Loctite primer? Learn something that not very many DIYers know about the use of Loctite threadlocker.
@HacksbyDad
Here's the link to the Loctite video that demonstrates their breakaway testing... • Torque Adhesive Testing
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The Loctite SF 7649 primer shown in this video is available at Amazon...
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Please check out my Amazon Storefront... www.amazon.com...
This video is for entertainment purposes. Follow the manufacturer's specifications for torquing or loading bolts for your specific application.
Check out all of my Nuts and Bolts videos in this playlist... th-cam.com/play/PL_WcGw5s6Cq6YK_s-NNne1838j25ijmii.html
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Thanks for replying to my comment on the other video. I have found the primer helps so I use it on critical parts of my race cars
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Distributions are interesting! I'd rather have a consistent performance rather than a good average.
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Quite surprising the variation. There's a few readings with substantial differences. I wonder what could explain that. Great tests with some really interesting results.
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Hello Dad!!. "Gracias por el video", thanks for the video. Im not from USA, im from Colombia. If i remember the primer is mainly for cold temperatures to shorten the drying time of the threadlocker. In Colombia we dont have that, as we have a single tropical weather all year long. But anyways i enjoyed your video.
Have a nice day Papá.
Thanks! Yes, it’s mainly for curing speed in cold temperatures and on passive metals. 👍😎
@@HacksbyDad, it's my understanding that threadlocking compounds are a variant of cyano-acrylate compound ( CA/Super glue) designed to cure in the absence of oxygen; tight threads exclude air from the interface, which begins the cure. Also, CA glues in general cure from exposure to moist air, and cure more slowly in dry environments; and so it makes sense that a primer would be helpful for fast cure of anything CA-adjacent in cold temps, which tend to be dry-air environments.
Threadlocker doesn't "dry", it cures. Note that you can't simply add a drop of Loctite or similar to the fastener after you connect them ---- it must be put on the threads prior to assembly. Otherwise, for after the fact threadlocking, you need Glyptol or a similar lacquer-like compound.
I would suggest trying this same type of test with the following: medium thread locker with bolts & nuts as is, and again with the nuts & bolts cleaned before applying the thread locker. We found a huge difference when using Acetone to clean before applying threadlocker.
This shows that, generally speaking, any kind of adhesive cure is almost always stronger if the cure is slow rather than fast; and primers can, in some circumstances, weaken rather than strengthen the bond.
They don't cure well, and sometimes not at all, on stainless bolt and nuts without the primer.
In some cases, it's an unfortunate necessity.
If you want to activate a surface paint or adhesive , try a little white vinegar, 30 % works even better .
How do u do for play the video on plainnsite ?
Never even heard of this stuff. Great video and testing i think if you have a can it definitely doesn't hurt. though i think you should not remove the outliers on such a small sample. Maybe 8-10 you can do that but the variability of the hardware and the adhesives should be considered. This is what you'll really face
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I am supper concerned with the low torque values. Thread locker should create a fairly uniform torque (not a surprising high and certainly never low). They are generally anaerobic, so maybe the 0 and low ones had too much air (too loose) to work (cure) properly. Who knows, but clearly a fail. Another thing that this shows, is testing is very important if it is a critical install.
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On my case i never have seen the primer wherever the loctite it's sell, can other thing be used in sustitution of the primer!?
I don't know of a substitute for the primer. In most cases the primer is probably not needed.
@@HacksbyDad Thanks for your reply, God blessed you 🙏🏼
Thanx 👍
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Do you want to wire brush the plain steel before applying the loctite? I think the black color is because of the oxidization.
Thanks! I didn’t think of that. 👍😎
Actually , the Black is a surface coating to PREVENT rust in storage .
@@johncunningham4820, *anodizing*, an electrolytical process to prevent further oxidation; but high-humidity or condensation will cause rusting eventually. Identically anodized fasteners (same metal and coating) tend to cold-weld themselves together anyway.....
The black color is a chemical coating.
@@goodun2974 I didn't know anodizing was used on anything but aluminum.
Edit: Upon reading, ferrous metals are specifically excluded from being anodized.
As far as I can tell, Loctite seems to need a primer if the formula ends in a even number, and for odd ending formulas, these are usually labeled as "oil resistant."
I'm searching for a different formula because the primer has only a year shelf life.
How were you able to remove the red loctite without heat?
A short cheater bar. 😎
How about nylon with lock washer ?
I think thread locker beats them both.
Are you from Hawaii? I hear a little Hawaii local twang in your voice lol😂
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Loctite is intended to combat vibration induced loosening . It is not really an adhesive .
Thanks! It is an anaerobic adhesive that is used to prevent loosening by vibration. Measuring its breakaway or breakloose torque is a convenient way that the manufacturers use to test its strength. 👍😎
@@HacksbyDad would you try and glue something with it ?
@@HacksbyDad they use the Junkers test , are you familiar?
@@philliplopez8745 Nope. I would not.
@@philliplopez8745 Yup. I can't figure out an easy way to make a Junker test rig. Here's my diy version of an alternate aviation vibration test rig... th-cam.com/video/lwtUWB2TIYA/w-d-xo.html
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you used the primer wrong
it's not supposed to just be sprayed on like paint-move the spray close to the thread
it's supposed to soak the thread and remove contaminants with it
picture dries and works best with heat-just use a lighter or something and you speed up the chemical reaction
BTW heat speads up any chemical reaction