How to prevent a screw from loosening: Loctite, Safety Wire, Jam nuts & More Part 2 of 2

[guruflorida]

Thanks! Excellently informative!

[adamxsquared]

I was under the impression that loctite is an anaerobic chemical that hardens in the absence of air. thats why you can leave it sitting around all day with out the cap on and it won't harden. it is only once you torque down the fastner and squeeze out all of the air that it hardens. I have never heard about it reacting with metal, not saying that its not accurate though.

[saunixcomp]

@adamxsquared You might be right - the anaerobic part sounds familiar. However, I am certain I've read something about it reacting with metal - and I know with some non-metalic surfaces, you are supposed to use a primer (e.g. activator) to ensure it hardens.

[loctitecanadainc]

Very thorough and accurate. The issue with the Nordlock system is that when assembling the two interlockign washers create a lot of friction, which means the energy of torquing goes into heat versus stretching the bolt. As a result the clamp load generated by the bolt drops by over 50% if the original torque spec used.

[saunixcomp]

@loctitecanadainc Wonderful input!. Assuming you are with Loctite, I'd love hear more about choosing Loctite threadlockers. Despite reading the information on the Henkel site (e.g. 142874_Threadlocking_Solutions­_Guide.pdf) and conversing with some of your engineers, product selection remains a mystery. For instance, if I'm using a 1/4x20 Grade 5 SHCS in a blind, steel threaded hole, and I want a 'permanent' bond, shouldn't there be ONE compound which is ideal? E.g. 262? or 263?

[Danoli95]

Just what I needed before my job interview. Excellent videos, many thanks!

[saunixcomp]

@Oppland29 Glad to hear!

[lazystart]

Bevel washer, not belville. Also, safety cable is a great alternative to safety wire. The tools are a little more expensive, but WAY easier to use. The same principles apply as when you use safety wire.

[saunixcomp]

@lazystart No, It's bellevile washer, not "bevel". I'll have to look into safety "cable".  Thanks.

[YoungJim409]

0.040" lockwire is great for learning, but 0.032" or 0.020" are far easier to work with. It is a skill that you must keep current though, it is sensitive to loss of hand skills.

[happymark1805]

I use the loctite 542, it's an hydraulic sealer but also does a fine job on bolts on my harley and it prevents water getting in between the threads.

[rlewis1946]

Informative as always! I learned something new, thanks for sharing!! RL

[gbowne1]

LocTite has HUNDREDS of different types. The most popular ones are in the 200 series numbers. Everyone should have some in their shop. It should not replace RTV sealer / silicone.

[kneedown4GOD]

great vid!i love all of your stuff,very informative!i agree with you on the safety wiring,i have a road race bike and it drives me crazy when i have to wire it.

[zippy308]

Pretty good series. I am a big believer in Loctite but to each his own.