You Don’t Know this About Loctite

Incorrect viewer comments helped me solve a Loctite mystery. Learn how.
@hacksbydad
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This video is for entertainment purposes. Follow the manufacturer's specifications for torquing or loading bolts for your specific application.

[@kageshadowmane4271]

You are absolutely correct. When a nut is torqued down, one side of the threads are compressed leaving a wider and wider gap on the other side of the threads, the more the nut is torqued. This squeezes the locktite out of the compressed side of the threads and into the widening gap on the other side of the threads, resulting in slightly less than 50% contact area than before torquing. There are different bolts with different thread types. Not all threads require torquing down till you feel metal flex. 🙄 The threads that do require this, also require replacing after every removal, (as the threads are now bent, smashed, spread, and weakened, and bent back the other way from removal). Like bending wire, this makes threads weak. Tips for fastening hardware! 1) Know your hardware’s specification ratings, (they all have them: weight limit, shear limit, torque limit, etc.). 2) Don’t ever over torque hardware past it’s rating. 3) Use the correct adhesives, and or locking hardware for the job. Red is not the same as blue, know the difference and their application limitations. 👍 Love your channel! Your videos are Spot On!

[@twirvin]

Great test, could you test reused bolts … bolts with old locktite, old loctite with new added, improperly cleaned bolts with new loctite.

[@ronhaefner7833]

Interesting. Good insight on the analysis. On a separate note: stainless steel requires a primer to cure. Rep from Henkel shared a story from a dairy farm that had concerns with Loctite and stainless steel.

[@HacksbyDad]

Thanks! I'm thinking of testing stainless steel nuts and bolts with and without an activator/primer. 😎

[@norm5785]

Thank you for sharing your update. Everyone stay safe, happy and healthy. From Henrico County Virginia

[@HacksbyDad]

You're welcome! 😎

[@juststeve5542]

Makes sense. Nice discovery.

[@HacksbyDad]

Thanks! Much appreciated! 😎

[@jeremiahbullfrog9288]

Thanks for publishing your science for the benefit of all, too much information is behind paywalls these days. Cheers

[@HacksbyDad]

You’re welcome and thank you for the feedback! 😎

[@KostadinIvanov]

Благодаря! Thank you!

[@HacksbyDad]

👍😎

[@fookingsog]

So next question since you've figured this part out... Does Loctite 271 work best with any particular metal coating/plating???🤔 The two other platings/coatings I am specifically thinking of are "Yellow Chromate" and "Black Oxide"!!!

[@HacksbyDad]

Not sure. It might be worth testing. Thanks!

[@catsshadows]

Most people still think that loctite is there to increase the torque needed to break lose the bolt or screw. This is not what loctite is for, it is to prevent the fasterners from coming lose due to vibration or use. It simply takes the place of a lock washer.

[@catsshadows]

Love your vids by the way!!

[@HacksbyDad]

Thanks! Loctite resists vibration by "gluing" the fastener which also increases the torque required for removal. Measuring the breakloose torque is easier to measure if you don't have a vibration setup. 😎

[@MikkoRantalainen]

Great testing methodology! If you're going do to additional tests in the future, it would be interesting to see how Locktite 290 (wicking-grade threadlocker) works in practice with similar testing. I think that can be applied by first torquing the nut dry and then applying the wicking treadlocker. I would be seriously disappointed if it didn't clearly increase breaking torque required after curing.

[@HacksbyDad]

I got you covered. Here's a video with green Loctite... kzbin.info/www/bejne/l57UlqZ-pd52gck 😎

[@5jjt]

Remember, zinc is a coating, but is also a metal

[@eugenepolan1750]

Does it matter in real life how much prevailing or breakaway torque locktite provides when the nut hasn't been torqued? Who uses it in that matter? Maybe something that is shipped while loosely assembled and the final torque is applied later? I've seen loosely assembled fasteners come apart due to sympathetic vibrations during shipping.

[@HacksbyDad]

Thanks. I don’t think it matters much. In my opinion, Testing loose or untorqued nuts removes a variable and simplifies the testing process. It also gives higher results that look more impressive. 😎

[@andreystepanov8643]

Thread locker is not a glue. It fills gaps between threads therefore prevents cross axial movement nut to bolt under dynamic load. Gluing is a side effect😊

[@HacksbyDad]

Thanks! Threadlocker by definition is an anaerobic "adhesive." In addition to filling the gaps, it also adheres to and grabs the surfaces to minimize movement. The breakaway torque is a simple way to measure the adhesive strength of the threadlocker. I'm working on a new vibration test to put various threadlockers, lock washers, and lock nuts through their paces. 😎

[@andreystepanov8643]

@@HacksbyDad NAS vibration test? Have made some. You'll be surprised too

[@HacksbyDad]

@@andreystepanov8643 Yup! You read my mind! A DIY NAS vibration test. The Junker test doesn't seem as realistic. Here's my first version of the DIY NAS test... kzbin.info/www/bejne/oqjXhop4Z7l8j6M kzbin.info/www/bejne/anmQeYJ-j5iWnqM The rig is too cumbersome. My next rig will be more light-weight. 👍😎

[@andreystepanov8643]

@@HacksbyDad You have done it already) Junker test shows different results. Each connection requires its own fixing solution

[@HacksbyDad]

@@andreystepanov8643 👍😎

[@trench01]

Is this channel all.about lock tight? Imagine if project farm did many videos on 1 item that most dont use on a daily basis would his channel increase or.dexrease? But anyway thanks for the video

[@HacksbyDad]

LOL No, the channel is not all about Loctite. It's is a focus right now with all the ideas coming in from the comments. 👍