Suggestions:
Torque the nuts to spec (from OSHA 1926.251):
1/8" = 4.5 ft.lbs.
3/16" = 7.5 ft.lbs.
1/4" = 15 ft. lbs.
5/16" = 30 ft.lbs.
3/8" = 45 ft.lbs.
If you want an extra measure against loosening, assemble the nuts using
thread locking compound such as Loctite, and/or add a jamb nut on top of the
primary nut.
Hope this gives you some ideas.
Good luck on your project.
Matt
KM5VI
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
kr2q@optimum.net
Sent: Friday, November 27, 2015 9:58 AM
To: towertalk@contesting.com
Subject: [TowerTalk] How to "lock down" wire rope clamps/clips?
Over the years, it seems that most antenna manufacturers have moved to using
some form of Nylock nuts (the nuts with the nylon insert for "high
vibration" applications).
I have seen this on my Cushcraft XM series monobanders, on my Optibeams, and
most recently on my SteppIR (DB36).
With respect to the latter, the cable clips just use a single nut to
compress down on the wire cable. There is no locking nut, no lock washer, no
Nylock, etc.
Why is this? I have heard from others that this can be, and has been, a
point of failure.
What method would you suggest to ensure that these wire rope clamps do not
loosen up over time? Just electrical tape?
RSVP
Thanks
de Doug KR2Q
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