What is this part?

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Scott_Conger
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What is this part?

Post by Scott_Conger » Sun Sep 12, 2021 3:11 pm

Was working in my shop today and this came off of my lathe...

it's about 5/8" long and 9/16" diameter

Does anyone know what it is?


IMG_20210912_124519005.png
IMG_20210912_124408513.png
Last edited by Scott_Conger on Sun Sep 12, 2021 5:24 pm, edited 1 time in total.
Scott Conger

Tyranny under the guise of law is still Tyranny

NH Full Flow Float Valves
Obsolete carburetor parts manufactured

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Humblej
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Re: What is this part?

Post by Humblej » Sun Sep 12, 2021 3:42 pm

Need a sense of the scale of it.

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George House
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Re: What is this part?

Post by George House » Sun Sep 12, 2021 4:46 pm

It’s obviously a part for a rare and expensive carburetor
I don’t know why I turned out this way. My parents were decent people 🤪


John kuehn
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Re: What is this part?

Post by John kuehn » Sun Sep 12, 2021 5:18 pm

Looks like a seat for a NH Carburator spray needle but don’t think so.


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Scott_Conger
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Re: What is this part?

Post by Scott_Conger » Sun Sep 12, 2021 5:23 pm

Jeff

it's about 5/8" long and 9/16 diameter
Scott Conger

Tyranny under the guise of law is still Tyranny

NH Full Flow Float Valves
Obsolete carburetor parts manufactured


ThreePedalTapDancer
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Re: What is this part?

Post by ThreePedalTapDancer » Sun Sep 12, 2021 5:59 pm

It’s the mixture screw cage for a Stromberg of


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Scott_Conger
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Re: What is this part?

Post by Scott_Conger » Sun Sep 12, 2021 8:15 pm

BINGO!

Give that man a prize!

(it goes on pretty much any Stromberg of the era)


IMG_20210912_123715563.png
Last edited by Scott_Conger on Sun Sep 12, 2021 9:47 pm, edited 1 time in total.
Scott Conger

Tyranny under the guise of law is still Tyranny

NH Full Flow Float Valves
Obsolete carburetor parts manufactured


Allan
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Re: What is this part?

Post by Allan » Sun Sep 12, 2021 8:38 pm

Scott, how did you form the ridges on the inside?

Allan from down under.


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Scott_Conger
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Re: What is this part?

Post by Scott_Conger » Mon Sep 13, 2021 10:06 am

Allen

with a lot of thought, planning and some specialty tooling.

Some time back, by coincidence, Stan Howe mentioned that he'd like to get some made and felt that perhaps 3-D printing was the way to go. Finally needing one, myself, I spent a fair amount of time figuring out how the factory would have made these things by the thousands, quickly, and that imagined method is the path I chose. My enjoyment in this phase of the hobby is doing things that either "cannot be done" or no one is doing it...believe me if someone was making these things, I'd be buying from them, because the time, materials, tools, fixtures involved are ridiculous relative to the return. Still, that expense buys me the satisfaction of having done it, and that's what I'm after.
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NH Full Flow Float Valves
Obsolete carburetor parts manufactured

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Re: What is this part?

Post by Duey_C » Mon Sep 13, 2021 10:56 pm

Those buggers are threaded in!
I wondered if pressed in. The M-3's I have are formed for the detents.
Beautiful work, my goodness! Drooling......
How to keep from scratching them on install?
Actually glad I did not see this a few days ago when fussing with a plugged venturi M-3. Else I would've tried to unscrew the high speed to remove the jet below to look/check.
Thank you!
Since I lost my mind mind, I feel more liberated


Topic author
Scott_Conger
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Re: What is this part?

Post by Scott_Conger » Mon Sep 13, 2021 11:03 pm

Dewey

All Strombergs have the formed wells in the beginning, which are very prone to cracking and have only 1/2 the possible rotational positions (8) of the later machined versions (16).

As for screwing them in without damaging them, I have made a special wrench to fit them which works perfectly.
Scott Conger

Tyranny under the guise of law is still Tyranny

NH Full Flow Float Valves
Obsolete carburetor parts manufactured

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Duey_C
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Re: What is this part?

Post by Duey_C » Mon Sep 13, 2021 11:28 pm

Whoa. Cool.
Thank ya sir!
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Re: What is this part?

Post by Allan » Tue Sep 14, 2021 7:18 pm

Scott, you should go into politics. Your non answer to a direct question is an admirable example of the way they treat us. I don't have the skills or the machinery to do what you have done, but I do have curiosity and interest in how things are done.

That same article on my OF's is ridged on the outside, as well as the inside. I suspect it was produced using dies and some kind of press. I was interested in how you managed to make the ridges on the internal side of a blind hole.

Please excuse my temerity in asking. I will endeavour to curb my curiosity in future.

Allan from down under.


speedytinc
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Re: What is this part?

Post by speedytinc » Wed Sep 15, 2021 8:53 am

My, non professional, machining experience would lead me to a relatively simple broaching process.
The broach would need a fair amount of relief behind the cutting edges.
The OD on the part body would be much heavier to prevent splitting during the cutting press & OD thinned last.
Am I in the ball park? I am also interested in exactly how you did it. Another beautiful part. Much respect!

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