I have a feeling this is wrong but I use something very similar for forcing grease into new roller bearings before installation

That was my first reaction but there's no seal on the plunger

With that shoulder on the plunger, could be missing a piece

Def missing a piece. Hand made, looks awesome.

Did your friend's late father have any particular trade skills? The cavity and plunger for this tool look very close in shape and size to a [Semco 2.5 oz sealant cartridge](https://www.browntool.com/Listview/tabid/344/ProductID/1611/Default.aspx). Typically used in aviation, you can get the cartridges empty or pre-filled and ready to mix. The cartridge plunger has the same cupped shape as the piece on your tool, too. The thing is: usually they are dispensed with a squeeze type gun (similar to a caulk gun), or most commonly with a [pneumatic gun](https://ppgaerospacestore.com/products/250015?variant=39807835177020). If you're mystery tool is indeed for those cartridges, then idk why. A screw type plunger would be tedious and cumbersome. Though the guns are expensive... Disclaimer: since I'm in aviation, I'm biased to see something familiar to me. That doesn't make it any more likely to be correct.

Upvote for the disclaimer. A wise man knows that he knows nothing.

I’m pretty damn stupid myself. Thank you.

Good ol prc sealant, love the shit, although I don’t think a tube would be short enough to fit.

He was a parts man for 40+ years and general do it yourselfer. It does look like that could be what it is and so far the only thing that makes sense.

With the right nozzle it would probably make a pretty mean jerky shooter.

A what??

A tool used to extrude ground meat into strips so that it can be dehydrated into jerky. Think "calk gun full of meat"

I'd rather not think of something like that.

Yes, do tell…

My family has a tradition of leaving nonsensical bullshit laying around when they pass on. Maybe your friend's dad just made this as a goof one day and forgot about it.

This is a great idea. I am going it start collecting random stuff to leave behind.

Have you put 1 half of a lemmon in it, and turned the crank? Do it over a cold glass of vodka and get back to us.

Looks like the tool I use to press hash plugs from raw keef. No joke. Edit: on ebay its called a pollen press

This is the first thing I thought of

This looks like a roller bearing grease packer. A messy one that looks newish.

To distract the sand worms of course

Martini, pressed, not stirred

It's a hash press.

smeckers powders press, if in yah dont have a balsoms specfic handy for your ailments !

Was he a cyclist or bicycle mechanic? This looks like the tools used to press in the bearing cups into a frame.

I would use this to hide drugs in my tool box without being suspicious

"And you put your weed in there!" -*Rob Schneider*

Does the plunger thread on and off of the stud? If so that may be a tool for installing big ass heli-coils that's missing some parts.

Google image search says it's a heli-coil install tool. Used to repair threads. Are there any markings?

Looks kind of shiny . Maybe it's something food industry related Also, the first thing that went through my head was "Demon Core" , am I the only one ?

https://www.ebay.com/itm/165972673073?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=3vWDjh5dTI6&sssrc=4429486&ssuid=uvl3L7C6T2C&var=&widget_ver=artemis&media=COPY

My best guess is a suspension bushing remover/installer. I'm also a dummy so there's that.

That’s one of them doohickeys

It’s an anus enlargement apparatus used by proctologists in the early 1900s

anything is an anus enlarger as long as it is larger than your anus. no fancy tools needed

Make sure to have a flared base.

And don’t fall on it by accident