We can get by with just zinc plated in our environment I suppose but
again replace just the nut or both the nut and the bolt?
Best regards,
Brandon Yuchasz
GogebicRange.net
www.gogebicrange.net <http://www.gogebicrange.net/>
*From:*Af [mailto:af-boun...@afmug.com] *On Behalf Of *Ken Hohhof
*Sent:* Friday, June 19, 2015 10:19 PM
*To:* af@afmug.com
*Subject:* Re: [AFMUG] Gtek Communications deploys PMP 450
So where can you buy a galvanized M8x1.25 nut? In any case, I would
think you would have to replace both because galvanized nuts are
usually tapped oversize to accommodate the extra thickness of the
galvanizing on the bolts.
I was able to find a bronze hex nut, it doesn’t specifically say
silicon bronze:
http://www.mcmaster.com/#91776a102/=xp6t4f
Would it be so bad to just use a zinc plated nut? Otherwise, replace
both the nut and bolt with galvanized 5/16”. A 13mm wrench might
still work.
The other thing I’m wondering is whether you could get away with
using some kind of grease on the threads instead of actual
anti-seize. Something you have anyway like dielectric grease or
O-ring grease. Otherwise, I think the nickel anti-seize is what
you’re supposed to use with stainless steel:
http://www.oreillyauto.com/site/c/detail/PER0/77124/N0490.oap
*From:*Brandon Yuchasz <mailto:li...@gogebicrange.net>
*Sent:*Friday, June 19, 2015 9:49 PM
*To:*af@afmug.com <mailto:af@afmug.com>
*Subject:*Re: [AFMUG] Gtek Communications deploys PMP 450
Okay so clarify for me. Are you guys leaving the stainless steel bolt
in place and just using a none stainless steel nut ( galvanized for
example) to avoid the seizing problem? Let say for example on a
force 110 dish. Or are you replacing both the bolt and the nut with
galvanized.
I am asking since I have had this on the force 110 dishes and also
just had three stainless U-bolt clams seize today when removing some
older antennas from a tower site. We had to cut them off.
Best regards,
Brandon Yuchasz
GogebicRange.net
www.gogebicrange.net <http://www.gogebicrange.net/>
*From:*Af [mailto:af-boun...@afmug.com] *On Behalf Of *Ken Hohhof
*Sent:* Friday, June 19, 2015 7:28 PM
*To:* af@afmug.com <mailto:af@afmug.com>
*Subject:* Re: [AFMUG] Gtek Communications deploys PMP 450
The worst had to be the special axle-like bolt on the first version
430 sectors, I think those were made by PCTel? If you cranked the
nuts down even moderately hard to keep it from slipping, it would
snap. I don’t think seizing was even the problem, it looked like the
inside of the bolt was crystalline and just asking to break when you
torqued it. And it was not something you could buy at the hardware
store or McMaster, and Motorola support was absolutely unhelpful
about getting a replacement, I ended up having to MacGyver something.
*From:*George Skorup <mailto:geo...@cbcast.com>
*Sent:*Friday, June 19, 2015 7:13 PM
*To:*af@afmug.com <mailto:af@afmug.com>
*Subject:*Re: [AFMUG] Gtek Communications deploys PMP 450
Oh, sorry, forgot to mention that. Yes, I'm talking about the long
mounting bolts and nuts. Haven't had a problem with the short hex
head bolts that mate the mounts to the antenna itself. Except you
really need to crank down on those. I tightened them to what I
thought was good, but then I could still give them a slight push or
pull and they moved. So I'm trying to tell the guys to make sure
those are really nice and snug, but try not to wrench too tight on
the mast clamp nuts. They did that.. and they still seized.
On 6/19/2015 7:04 PM, Ken Hohhof wrote:
OK, on the 450 sectors, my recollection is the elevation
adjustments are short hex head bolts that go into threaded
inserts. If those are seizing on people, I think I will just
apply anti-seize goop (the good stuff with nickel dust in it) to
them before assembly since I do that on the ground and there’s no
need to touch the threads afterward.
The ones that clamp it to the pipe are wiz nuts on long threaded
bolts, those would be harder to use anti-seize on, and would be
the best candidates to swap out for bronze nuts.
*From:*George Skorup <mailto:geo...@cbcast.com>
*Sent:*Friday, June 19, 2015 6:13 PM
*To:*af@afmug.com <mailto:af@afmug.com>
*Subject:*Re: [AFMUG] Gtek Communications deploys PMP 450
Yup, same here. Had to peak out a Force110 link and couldn't
break the elevation nut loose, so we had to leave it a few dB off
instead of breaking it off completely and/or bending the mounting
plate.
On 6/19/2015 5:56 PM, Mathew Howard wrote:
I've had several of the SS nuts seize on the ePMP
Force110's... which appear to be the exact same nuts as on
the slightly-less-than-half a ton 3.65 sector I just put up.
I would very much like to see Cambium switch to a different
kind of nuts.
On Fri, Jun 19, 2015 at 5:05 PM, Ken Hohhof <af...@kwisp.com
<mailto:af...@kwisp.com>> wrote:
Have you actually experienced the SS nuts seizing? Maybe I’ve
been lucky, but I have not had trouble with that even after
years. I guess I should be putting anti-seize compound on
them, but it’s so messy.
Metric silicon bronze nuts look to be expensive, like in the
$1 each range, to swap them out yourself. Which of the many
nuts would you want to be silicon bronze? Just the 4 that
hold it to the pipe? Or also all the ones involved in the
elevation adjustment?
*From:*George Skorup <mailto:geo...@cbcast.com>
*Sent:*Friday, June 19, 2015 4:42 PM
*To:*af@afmug.com <mailto:af@afmug.com>
*Subject:*Re: [AFMUG] Gtek Communications deploys PMP 450
I've pulled two up the tower by hand at once and the tower
guys didn't complain, so they can't be that heavy.
What I really wish Cambium would do, or talk Laird into
doing, is replacing the nuts with silicon-bronze like LMG
uses on their stuff. Or just go to galvanized. The stainless
on stainless sucks. They're $500 antennas and I shouldn't
have to go buy extra shit for them.
On 6/19/2015 3:45 PM, Josh Luthman wrote:
I bet it's less than half a ton...don't be so dramatic =P
Josh Luthman
Office: 937-552-2340 <tel:937-552-2340>
Direct: 937-552-2343 <tel:937-552-2343>
1100 Wayne St
Suite 1337
Troy, OH 45373
On Fri, Jun 19, 2015 at 4:44 PM, Matt
<matt.mailingli...@gmail.com
<mailto:matt.mailingli...@gmail.com>> wrote:
> 3GHz and 5GHz I've only used the Cambium/Laird sectors. The
patterns and
> null-fill is excellent. So Matt, your new integrated AP
antenna better be
> good. :)
Wish they made the sector mounting hardware out of
aluminum. You get
4 of them together and they weigh a ton.
