Seems cheaper to just go to Menards and get galvanized 5/16 bolts and nuts. On Jun 20, 2015 11:34 AM, "Ken Hohhof" <[email protected]> wrote:
> Where do you find them in metric? > > McMaster lists M8x1.25 bronze hex nuts at 2 weeks lead time and over $1 > each. Can’t even find another source. > > 5/16-18 wouldn’t quite fit, the diameter is really close, but thread is a > little coarser, would need more like 5/16-20. > > > *From:* Bill Prince <[email protected]> > *Sent:* Saturday, June 20, 2015 11:10 AM > *To:* [email protected] > *Subject:* Re: [AFMUG] Gtek Communications deploys PMP 450 > > We just replace the nut. Nothing wrong with stainless bolts as long as you > don't use stainless nuts on them. Most of the ones you need can be gotten > at McMaster Carr. I'll use either HDG or silicon bronze depending on the > size. > > bp > <part15sbs{at}gmail{dot}com> > > > On 6/19/2015 8:51 PM, Brandon Yuchasz wrote: > > 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 > > > > *From:* Af [mailto:[email protected] <[email protected]>] *On > Behalf Of *Ken Hohhof > *Sent:* Friday, June 19, 2015 10:19 PM > *To:* [email protected] > *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 <[email protected]> > > *Sent:* Friday, June 19, 2015 9:49 PM > > *To:* [email protected] > > *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 > > > > *From:* Af [mailto:[email protected] <[email protected]>] *On > Behalf Of *Ken Hohhof > *Sent:* Friday, June 19, 2015 7:28 PM > *To:* [email protected] > *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 <[email protected]> > > *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 <[email protected]> > > *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 <[email protected]> > > *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. > > > > > > > > > > > > >
