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Nmo mounts

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scanbc780

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Drop the NMO in from the outside and not put it through from the inside. You will assume its to big if you go about it in the wrong direction.



I have probably read 50 different posts on many sites about drilling holes for an NMO mount. The best idea seems to be to purchase a drill specifically for the job. So, I bought one.

Here is my question; how come a 3/4" hole is too small for an NMO? I have 2 different NMO cables, one is Antennex and the other is one I got from HRO (Hustler?) and both of them are 1/16" larger than 3/4".

I used my brand new Antennex HS34 to drill a hole through an old cookie sheet. I measured with my tape measure and it is 3/4". The NMO is 13/16" (That is 3/4" + 1/16") and does not fit.

The Antennex cable came with the "fender" bracket and I measured it, 13/16".

I really don't want to have to Dremmel that extra 1/16" on the roof of my vehicle.....

What the heck did I miss?
 

Rob_K

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Drop the NMO in from the outside and not put it through from the inside. You will assume its to big if you go about it in the wrong direction.

Ok, now I feel dumb.

This worked on my "cookie sheet".

I have a custom made "fender bracket" that also has a 3/4" hole in it. It is about 1/8" thick and I still can't seem to squeeze it in. Is it because it is so thick? I assume the roof of my Tahoe will be less than 1/8" and I won't have any trouble dropping the NMO in from the outside?

Thanks for the prompt reply. Hopefully I'll be able to scrub the "N00b" tattoo off my forehead someday...

-Rob
 

Rob_K

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well, the mount is in and capped. Now I just need to find an antenna that meets my needs.

Thanks again,
Rob
 

fineshot1

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I have probably read 50 different posts on many sites about drilling holes for an NMO mount. The best idea seems to be to purchase a drill specifically for the job. So, I bought one.

Here is my question; how come a 3/4" hole is too small for an NMO? I have 2 different NMO cables, one is Antennex and the other is one I got from HRO (Hustler?) and both of them are 1/16" larger than 3/4".

I used my brand new Antennex HS34 to drill a hole through an old cookie sheet. I measured with my tape measure and it is 3/4". The NMO is 13/16" (That is 3/4" + 1/16") and does not fit.

The Antennex cable came with the "fender" bracket and I measured it, 13/16".

I really don't want to have to Dremmel that extra 1/16" on the roof of my vehicle.....

What the heck did I miss?

You must have missed that fact that after the 3/4 inch hole is drilled you must
place the nmo assembly in the hole and then rock it back & forth while angling
the grip lips into the hole so that they may grip from inside the metal hole. Once
the grip lips are inside the assembly should be centered by again moving it around
slightly while tightening the threaded lock nut ring. Be careful the o ring does not
dislodge during this process. I have installed hundreds of these and I often wish
they would have improved on this design by at least making the o ring built into
the threaded lock nut ring so it does not slip out during the tightening of the lock
nut ring.
 
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