Technical Term for Bolt Backing Out? 4

[JakeAdkins]

Is there a more technical way of saying that a bolt is backing out?

I am writing a service bulletin and want to let the customer know that a bolt tends to back out over time.

 

[kslee1000]

There are quite a few (self-claimed) bolt locking devices (anti backing due to vibration). You can do a web search to find out.

 

[ornerynorsk]

Nordlock washers work very well. There is also this stuff called "Loc-Tite". Sorry, too much sarcasm for this late in the week. :>)

 

[JakeAdkins]

Adalius-

We have found that lock wire doesn't really work as a retention device but more like an indicator (if lock wire is broken you bolt is loose.

Nordlocks do work very well but I don't have the counter bore.

 

[JohnGP]

And besides, Jake indicated earlier that a permanent fix had been designed.

 

[Adalius]

I've used Nordlocks before, I thought they were an incredibly simple yet deviously smart solution.

I must admit I'm surprised you say you've had lock wire breaking from it backing out only under vibration, though, unless these are fairly small fasteners and thereby requiring a small diameter lock wire. Granted my experience mainly lies in gas turbines in regards to lock wire so you're talking a minimum of 1/8" wire.

In any event, as you said you found a permanent solution so its a moot point, I was just throwing a brain dropping out as curiosity often gets the best of me.

 

[waross]

I like

if lock wire is broken you bolt is loose

That says it all!

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[Ron]

IRstuff...yes..loosening can come from elongation of the bolt, creep, fatigue, etc....none of which are necessarily rotation.