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 Sent: Friday, June 19, 2015 7:13 PM To: [email protected] 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 Sent: Friday, June 19, 2015 6:13 PM To: [email protected] 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 <[email protected]> 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 Sent: Friday, June 19, 2015 4:42 PM To: [email protected] 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 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Fri, Jun 19, 2015 at 4:44 PM, Matt <[email protected]> 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.
