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Re: [TowerTalk] Mast clamp friction

To: Stan Stockton <wa5rtg@gmail.com>
Subject: Re: [TowerTalk] Mast clamp friction
From: "jim.thom jim.thom@telus.net" <jim.thom@telus.net>
Date: Sun, 13 Nov 2022 04:12:06 -0800
List-post: <mailto:towertalk@contesting.com>
I see on amazon, this non slip tape comes in 3/4" widths, and also 1", 2",
3" and also 4" widths.  Depending on clearances,  and surface material, it
could also
be applied to TWO mating surfaces.  That definitely won't budge.

Jim  VE7RF

On Thu, Nov 10, 2022 at 5:02 PM Stan Stockton <wa5rtg@gmail.com> wrote:

> 
> 
> Yes, I have been using this stuff for many years for mast and element
> plate clamps.
>
>
> https://www.amazon.com/dp/B07X7MJJXD?psc=1&ref=ppx_yo2ov_dt_b_product_details
>
> In fact I have element plates holding 20, 15 and 10 meter elements mounted
> to the boom with only one Stauff Clamp at ZF9CW with one wrap of this
> around the boom.  I have never had one move yet.
>
> 73… Stan, K5GO/ZF9CW
>
> On Nov 10, 2022, at 12:06 PM, jim.thom jim.thom@telus.net <
> jim.thom@telus.net> wrote:
>
> <Date: Wed, 9 Nov 2022 18:38:05 +0000 (UTC)
>
> <I use a light duty adhesive sprayed on the 'bore' part of the saddle.?
> Women's hair spray works fine.
>
> <While wet, sprinkle silicon carbide particles on the adhesive. This size
> <is about like ground pepper from a pepper mill.
>
> <Assemble and tighten down.? The silicon carbide presses into both the
> <aluminum saddles and into the zinc on the galvanized mast. It will not
> <slip!?? Be careful in handling the mast/saddles; the silicon carbide can
> <be hard on the hands.
>
> <73 de Steve, NR4M
>
> ##  Here is an easier way of increasing friction, esp if using a 1.875" or
> 1.900" OD mast with a 2.00" ID clamping setup...instead of any type of
> shim.
>
> ## Down at the local store, they sell  this sticky backed tape, that has an
> HD abrasive on one side (sticky on the other, with sticky back covered
> with  peel off  paper).  Back side is marked off like a grid.  It came in
> rolls, and sold by the foot.  It comes  in 1"-2"-3" wide rolls. I believe
> it was originally intended as a non slip, non skid material to be applied
> to wood or concrete steps.
>
> ##  For say a  1.900" OD mast, you require 1.900" X 3.14 = 5.97" length of
> either the 2" wide, or preferably the 3" wide stuff.  With a clean mast,
> the mast is then wrapped with the adhesive back tape.  There is no way in
> hell the mast is gonna slip, after U bolts / clamp assy, etc, torqued down
> properly.  It won't budge. Depending on type of mast clamp assy, you may
> require several wraps up / down the mast, where the actual clamps are
> bearing down.
>
> ## On my Tic-rings, they used the exact same stuff, but 1" wide, and 2 x
> strips of it, on both sides of the.. 'trough', that the boom sits into.
> Same idea, won't budge, period.
>
> ##  I also used the 2" wide stuff on my HB aluminum mast steps...for the 2"
> OD x 3/8" thick  4130 heat treated chromoly, galvanized mast. Each mast
> step consists of a 14" long piece of 2" x 2"  x 1/4"  thick 6061-T6 angle
> aluminum. The 2" wide stuff is applied to both the (outside)  horizontal
> and vertical side of each mast step. Then each mast step is clamped to the
> mast with a single DXE.. 'super 2" mast clamp".   I used a single  SS
> 1/4-20 bolt at each end of each mast step, pointed upwards a bit, and
> mating SS nylock nut. The purpose of the 1/4-20 SS bolts sticking up 1.5" -
> 1.75" is so when standing on the mast step, I know, and can easily feel
> with my boots, where the protruding 1/4-20 SS bolts are, and no way to
> accidently..put my boot 1/2 off  either end of the mast step.
>
> ## The abrasive backed material  (on both vert + horz surfaces),ensures
> when standing on the steps, boots don't slip..ever, esp when wet.  With the
> abrasive material on the vert surface, it provides for a better grip when
> climbing the steps. IE: palm of hand on the horizontal step, with fingers
> wrapped around the vert portion.
>
> Jim  VE7RF
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>
>
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