NMO Mobil permanent mount

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KO4IPV

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What is the best and most efficient way to tighten the NMO permanent Mobil Mount ? Having a hard time getting it tight enough so it doesn’t come loose! Tried a long nose plyers but can’t seem to get a good hold on the very thin part of the mount that is setting on top of the car roof , then there is the threaded part of the mount on top of that .
 

mmckenna

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They make overpriced tools that will work:

But you don't need one of those. Never seen anyone use one before...

I use a small pair of needle nose pliers. One pair I have has them at a 90º angle. The two tips of the pliers go in the two recessed holes in the center part of the mount. That'll keep the center part from turning.
Then use a wrench to tighten the outer ring.

Make sure you have the silicone lube on the O-ring before doing this or it can bind up and tear. And it doesn't need to be 'white knuckle" tight, just snug is good.
 

KO4IPV

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They make overpriced tools that will work:

But you don't need one of those. Never seen anyone use one before...

I use a small pair of needle nose pliers. One pair I have has them at a 90º angle. The two tips of the pliers go in the two recessed holes in the center part of the mount. That'll keep the center part from turning.
Then use a wrench to tighten the outer ring.

Make sure you have the silicone lube on the O-ring before doing this or it can bind up and tear. And it doesn't need to be 'white knuckle" tight, just snug is good.
Great info so those 2 little holes you put a needle nose in and then you tighten the but correct ? And put silicone were ?
 

mmckenna

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Great info so those 2 little holes you put a needle nose in and then you tighten the but correct ? And put silicone were ?
Yes, you can tighten the nut or the butt, it's up to you….

There should be an O-ring on the underside of the nut. Before you assemble the NMO mount, make sure the O-ring is properly in place. A bit of silicone grease on the O-ring does two things:
1. It'll hold the O-ring in place while you assemble the mount.
2. It'll lube the O-ring and keep it from binding up as you tighten the nut.

Some manufacturers include a small blister tube of the grease in the kit, some do not.
 

KO4IPV

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Yes, you can tighten the nut or the butt, it's up to you….

There should be an O-ring on the underside of the nut. Before you assemble the NMO mount, make sure the O-ring is properly in place. A bit of silicone grease on the O-ring does two things:
1. It'll hold the O-ring in place while you assemble the mount.
2. It'll lube the O-ring and keep it from binding up as you tighten the nut.

Some manufacturers include a small blister tube of the grease in the kit, some do not.
Thankyou
 

ladn

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Antenna Specialists used to include the "tool" with their antenna mounts. It basically amounted to a bent, heavy springy wire.
Another manufacturer's (maybe Motorola) mount was flat on opposite sides so you could hold it with a Crescent wrench.
I've pretty much just used the 90 degree needle nose pliers trick.
 

R8000

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I have always just finger tightned the brass ring while pulling upwards until I can't turn it anymore. Then a snug with a wrench. I haven't had issues with the mount turning and haven't needed a tool. The pulling upwards thing allowed the teeth on the bottom to grip just enough to keep the mount from turning. By the time I am ready for the wrench, the teeth have already bitten and good to go :)
 

mmckenna

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Antenna Specialists used to include the "tool" with their antenna mounts. It basically amounted to a bent, heavy springy wire.

At one point I had one of those, but not sure what happened to it. I keep thinking of making a new one, but I always forget. I've got to install an NMO in my brother in laws new truck today, so maybe I'll see if I have some rod stock that is the right size.
 

mmckenna

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At one point I had one of those, but not sure what happened to it. I keep thinking of making a new one, but I always forget. I've got to install an NMO in my brother in laws new truck today, so maybe I'll see if I have some rod stock that is the right size.
3/32" rod works. Found an old antenna whip that was 3/32nd's and just rolled a couple of my own.
But the needle nose plier trick works just fine.

 

KK6ZTE

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Antenna Specialists used to include the "tool" with their antenna mounts. It basically amounted to a bent, heavy springy wire.
Another manufacturer's (maybe Motorola) mount was flat on opposite sides so you could hold it with a Crescent wrench.
I've pretty much just used the 90 degree needle nose pliers trick.
The K794 thick roof mounts still include the tool. Have lots of them laying around
 
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