Date: Thu, 6 Jul 2017 11:57:32 -0400
From: "Charles Gallo" <charlie@thegallos.com>
To: "Grant Saviers" <grants2@pacbell.net>
Cc: towertalk@contesting.com
Subject: Re: [TowerTalk] Nylok nuts
<snip>
> I use Nord-Lock washers for high vibration or
> "can't loosen" applications when full bolt tension is ok, as split
> ring lockwashers are nearly useless. There are many many choices for
> fastener locking technologies. for some of them check out
> https://www.mcmaster.com/#hex-locknuts/=18dpj92
<snip>
If anyone wants to read a really interesting book on this, get a copy of
Carroll Smith's
"Nuts, Bolts, Fasteners and Plumbing"
Probably more than you'd ever want to know about what actually works,
DOESN'T work (hint, split lock washers are basically useless for a
properly torqued connection) and how to prevent things from coming
apart/failing
https://www.pegasusautoracing.com/productdetails.asp?RecID=1659
### I have seldom had issues with split ring lockwashers..and that included
vibration.
On a similar note, UST corp uses nylocks all over their towers... like on
all 22 x pulleys,
and also where the plates are that are bolted across the width of each top
section. Nylocks
galore.
## Im going to check out these Nord-locks, at 1st glance, they appear to be
the ultimate device.
Somebody mentioned A325 structural bolts. A325 is the same as a SAE- Grade
5 bolt. Beware,
the structural bolt tables will provide for a max TQ rating..depending on
whether its..wet...or dry.
Wet means lubricated, and dry means no lube on the threads. HUGE difference.
Same deal with
SAE - Grade 8 bolts...and their structural eq. If wet..lubricated... FAR
less tq is required. IF you lube
the bolts..and then use the max dry TQ rating, you will trash the bolt
threads.
## For stuff like boom splices, or inboard sections of an 80 or 40m rotary
dipole..where the typ
.25-20 or .25-28 SS bolt is used, the mating SS nylocks, lubed with never
seize, have not given me
any issues.
## back when I was a kid, nylocks were always called...aircraft nuts..or
..elasticstop nuts. Then
the term..nylock became the norm.
Jim VE7RF
------------------------------
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