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1" to 3/8" thread adapter?

Ramblin__Ralph
Explorer
Explorer
I want to mount my cell booster antenna to a rotating mount on my ladder. The antenna has spring at the end with a male 3/8 x 24 thread. The antenna mount has a male 1" x 14 thread. I've browsed the web some for a female-to-female adapter that would solve my problem, but no luck. Maybe there is someone here with more mechanical knowledge than me that has a suggestion? 🙂
Thanks,
Ralph
Ralph
2006 GMC 2500HD, XCab, SB, 6.0L w/2001 Lance 845
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15 REPLIES 15

CA_Traveler
Explorer III
Explorer III
Thans for posting the solution.

Another antenna solution is the use of a flag pole buddy type of mount for the antenna which allows the antenna to be raised/lowered while standing on the ground which eliminates any ladder climbing. I made my own from PVC pipe. The antenna can also be rotated manually from the ground.
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Bob

Ramblin__Ralph
Explorer
Explorer
Got the custom adapter from the machine shop to go from 1" to 3/8". Photo below is the full setup before it's mounted on the ladder rail. With my shaky hands I need another person to help. The lever arm is horizontal to lock the antenna rotation and vertical to allow antenna to be raised or lowered. Just hope I remember to lower it when investigating boondocking spots in trees. 🙂

BTW, I used the term "pipe cap" previously not knowing a real one uses a tapered thread. The threads in both cases here are "standard".

Ralph
2006 GMC 2500HD, XCab, SB, 6.0L w/2001 Lance 845
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Grit_dog
Nomad III
Nomad III
So it’s NPT for the big side? What about the 3/8 thread?
If it’s NPT then you could just bush it down.
That pipe cap will only get maybe 2 or 3 full threads due to the thickness of material. Is that enough to hold it?
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Ramblin__Ralph
Explorer
Explorer
Thanks for the additional tips. I got a 1" pipe cap and took it to the machine shop yesterday. He will drill and tap the 3/8 hole. I'll post a pic of the complete antenna mount after I get the cap from the shop.
Ralph
2006 GMC 2500HD, XCab, SB, 6.0L w/2001 Lance 845
Bilstein Shocks, TorkLift Stable Loads, 100 Ah LiFePo4, 225 watt solar
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profdant139
Explorer II
Explorer II
You've probably already thought of this, but you might be able to put together a "daisy chain" of reducing bushings. This is an example of one, but the price looks to be very high:


Bushing
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CharlesinGA
Explorer
Explorer
Docsource has the best idea, weld up something. 1"-14 is the axle thread on your trailer. Get a castellated axle nut, weld a 3/8 fender washer or two or a real thick washer you can find at the hardware store in the drawers of specialty hardware. Get a 3/8-24 self locking nut and put inside the big nut to secure the antenna.

Charles
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docsouce
Explorer II
Explorer II
Have your friendly neighborhood welder weld a flat washer to one side of a 3/8 nut then weld that to one side of the 1" nut. Used a fender 3/8 fender washer if needed. Might work.
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Grit_dog
Nomad III
Nomad III
I don’t think we’re talking NPT threads here. Prolly NC or NF.
You can’t get a suitable mount for the antenna?
Reason for the huge diameter on the booster?
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Ramblin__Ralph
Explorer
Explorer
Thanks for the additional info. I'll post a pic of my solution in a couple of weeks. 🙂
Ralph
2006 GMC 2500HD, XCab, SB, 6.0L w/2001 Lance 845
Bilstein Shocks, TorkLift Stable Loads, 100 Ah LiFePo4, 225 watt solar
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StirCrazy
Navigator
Navigator
Ramblin' Ralph wrote:
I want to mount my cell booster antenna to a rotating mount on my ladder. The antenna has spring at the end with a male 3/8 x 24 thread. The antenna mount has a male 1" x 14 thread. I've browsed the web some for a female-to-female adapter that would solve my problem, but no luck. Maybe there is someone here with more mechanical knowledge than me that has a suggestion? 🙂
Thanks,
Ralph


you will mostlikely have to go from 1" to 3/8th in two steps, a 1" to either 3/4" or a 1" to 1/2" if you can find it. then a step down from which ever size you ended up at to 3/8"

Steve
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mdcamping
Explorer
Explorer
How about https://www.mcmaster.com

Mike
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Durb
Explorer
Explorer
As I recall. you can jam a 3/8-24 bolt into a 1/8" brass pipe fitting. Also 3/4" pipe is around 1 1/16" OD and around 14 threads per inch. I would go to a good hardware store and get a 3/4" - 1/8" bell reducer and give it a try.

Ramblin__Ralph
Explorer
Explorer
BarryG20 wrote:
Option B go to a machine shop and have them make one for you.

That's what I'm going to do. I found I can buy a 1" pipe "cap" in stainless or brass. Since my old hands are too shaky to DIY, I'll take it to a local machine shop to drill/thread the 3/8 hole. Thanks to both for the input.
Ralph
Ralph
2006 GMC 2500HD, XCab, SB, 6.0L w/2001 Lance 845
Bilstein Shocks, TorkLift Stable Loads, 100 Ah LiFePo4, 225 watt solar
My RV Travels Webpage / Yearly Campsite Map / 740 Campsites / YouTube Videos /
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CA_Traveler
Explorer III
Explorer III
DIY, drill and tap? Use a 3/8" FF adapter then MF adapter?
2009 Holiday Rambler 42' Scepter with ISL 400 Cummins
750 Watts Solar Morningstar MPPT 60 Controller
2014 Grand Cherokee Overland

Bob