Re: Destructive Lock Nuts Suck

On 4/13/2024 11:25 AM, Joe Gwinn wrote:

On Sat, 13 Apr 2024 08:05:57 -0400, "Jim Wilkins"
<muratlanne@gmail.com> wrote:
 

"Snag"  wrote in message news:uvcbh7$2jb8r$1@dont-email.me...
>
On 4/12/2024 5:01 PM, Joe Gwinn wrote:

On Fri, 12 Apr 2024 13:36:58 -0700, Bob La Londe <none@none.com99>
wrote:
>
>
You probably want a bronze or stainless steel Drake two-piece Lock
Nut:
>
.<https://www.lok-mor.com/products/free-spinning/drake/>
>
Joe Gwinn
>

>
Looks a lot like a 40 dollar solution for a 2 dollar problem , Joe ...
Snag
>
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I look for reliable methods using easily available hardware or auto store
products, such as doubled nuts. If necessary they can be modified on the
lathe or drilled for safety wire.

 The OP was complaining that nothing he tried really worked, causing
danger to man and beast, and not so much about the cost of the
hardware, and Drake Nuts are the gold standard.  They simply don't
shake loose.  Finger tight causes noticeable locking.
 Failing that, I'd try a thick nut and a jam nut tightened hard against
one another.  And Loctite don't hurt.  I recall from a study I read
that one puts the jam nut under the thick nut for best shake
resistance.  Lok-Mor may have the study I recall, or it was an old
NASA study.
 Joe Gwinn

Well, I didn't actually say that.  Just that two of the nuts came off for no good reason.  I did install regular Gr-8 nuts and lock washers with red Permatex thread locker to finish my adventure.  Afterwards it made the trip up up to Globe/Miami over the mountains, down and back up through Salt River Canyon, and then on up and down the grades into Show Low.  There I loaded a full size 3/4 ton diesel pickup and made the reverse trip braking and engine braking up and down some modestly steep inclines.  Enough so that there were brake check areas and emergency runaway pullouts.
This morning I ordered a box of each of gr-8 lock washers and nuts.  The cost of which was about the same (a little less) as the couple items I bought at the Tractor Supply store in Coolidge to make repairs.  Before I make another such trip I'll be replacing all the lock nuts with regular GR-8 nuts and high strength thread locker.  As near as I can tell the threads on the u-bolts are fine and they do not appear to have stretched, but of course I didn't clamp them up and measure them.  Two of the original nuts just failed to hold. The new nuts did spin easily into place (which surprised me).
These are a pair of six ton axles and they were not cheap.  They were just the closest to the correct size for the application that I could find.
I've got a fair amount of faith in liquid thread locker.  I've used Permatex, Vibratite, and of course Loc-Tite brands with good results over the years.
I'm not opposed to more expensive solutions.  I just don't think its necessary here.  I did look at your link and I can see places it would be useful.
--
Bob La Londe
CNC Molds N Stuff
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