From The Old Barn - Whatzit?

[jacon4]

Gee Wiz,  the thing is, does it really matter? post has slipped into the what is it trivia which is quite a distance from what kind of antique. who cares?

It's a BIRD! It's a PLANE! It's..................

[Jlsherf]

The hole machine is not there.  This part is hydraulic and missing packings.  It screws to the frame of a sprayer a d the top skinny thing that goes up a and down goes I to a motor.  The hole at the bottom of the sleeve is where the paint draws up and then a hose attaches.  This is a newer model of what we are talking about.

https://www.google.com/search?q=paint+sprayer&prmd=svin&source=univ&tbm=shop&sa=X&ved=0ahUKEwiGn_X0porOAhWFYiYKHSsoCD0Q1TUINQ&biw=1024&bih=600#spd=13178324730269175270

[cogar]

Now I can't imagine a "spray painting" gun or "spray gun" of any fashion having a need for a 1-1/8" nut and matching 3/4" X 16-threaded solid steel bolt. (I assume 16 threads/inch, meaning a coarse thread bolt.)

You can find a lot of 3/4" bolts on bulldozers, large front-end loaders, etc., but not very many on a "hand-held" piece of equipment or implement.

[Jlsherf]

This paint sprayer is an industrial.  Not a hand held.  See previous post to yours for link to what I am talking about.

[mxyplqx]

Jacon4 - I agree. We’ve beat this to death.

Cogar - 3/4-16 is classed as NF or National Fine or UNF (Unified   Nat’l Fine) depending on thread depth etc etc.  3/4 dia NC has 10 thread/inch.

I totally agree this is not a paint sprayer part even heavy duty.

Jlsherf- The part does not reciprocate - it is screwed together.
With the head in place and the lock nut tightened it is basically one solid non moving piece.

There  is no axial passage for any fluid to flow thru. It is threaded for the shaft which, when fully screwed in, is nearly even with the base leaving just enough clearance for the screw driver shown. Those little holes are for inserting a rod for easier/fsster turning that fine thread.

The pic shows the base end more clearly.

Your linked site showed no spryer pump parts - just whole units.

=====
I’ll stick to the conclusion that it is a centering device which employs various size heads depending on the size of what’s being centered.

Bye.

[jacon4]

Jacon4 - I agree. We’ve beat this to death.

Oh Boy! but hey, if you guys are into it, have at it. Meanwhile, I am going with Jlsherf, it's a pump part!

[mart]

Where is Rauville ??  He can usually find these obscure items !!

[jacon4]

I dunno, maybe vacation?, The only reason i am here is, I am hiding from the heat!

[ghopper1924]

I can't believe I'm contributing to this thread, but it looks like Rauville hasn't been around for about 2 weeks...so maybe vacation is exactly right!

[jacon4]

I can't believe I'm contributing to this thread

Hey! It's an antique pump part man! circa 1988, BAM!
I hope Rauville is on vacation, wishes i was. It's just miserable in the carolinas now unless one has relocated to the coast. How hot is it in Charlotte? it's so hot that at 5 a.m. the "cold" water coming out of the faucet to make coffee is warm!

[ghopper1924]

Wow chicka wow chicka wow...BAM!!!!!

That reminds me of that great 90s show, In Living Color.

Hot? In Missouri the "real feel" is 110. I haven't even gone outside today. Our air conditioner will hardly go off (so thankful we've got it) and I shudder to think of our utility bill. Hey, that's my antique money!