Tell me what these are.

[Skysurfer]

These were in a box of junk someone was getting rid of.



The largest one is 2.5" tall at the threads. Diameter of each is 5/8", 3/4", and 1". I'm thinking they're some sort of pipe tool but I've never seen anything like them. The threads are spiral cut, the smallest one a standard 24 tpi but the others are slightly different and don't jive with anything on my thread gage.

 

[CwazyWabbit]

Look like pigtails for a grinder to run mops

 

[TheEquineFencer]

Broken bolt/screw extractors.

 

[j p smith]

They look similar to what was used for crack repair, you drill and thread in the tapered bolt, cut it off flush, then drill and thread in the next one right at the edge of the threads so it locks in with the first one

 

[woody 73]

I have seen them before but I am forgetful these days. On the other hand I can tell you what beast they resemble in the jungle of tools.

A close up shot of Jewelers bench Mandrels; wish I could help you out more!

 

[Skysurfer]

So the jewelers' mandrels would be a paired set then? The guy that owned them saved everything so I doubt he would have lost one of each size.

The crack repair is an interesting theory, what type of industry would that be used in? The po worked in the oil patch but his family history goes back to the 1800's and ranching was a big part of it, so they could have come from a variety of places.

Not extractors since the threads aren't reversed.

I'd have to see a picture of the grinder mop/pigtails since I've never heard the term before.

My initial thought was for flaring pipe but couldn't think of any pipe connection that would seal with the inner flair buggered by those threads. I looked at pipe deburring tools but they have a much more aggressive pattern on them. I hate to toss them out but I can't imagine I'd ever need these, seeing as how I didn't even know such a tool existed.

 

[bluebolt]

Since the threads are standard rotation they may be used for installing some kind of fitting that can't be gripped from the outside.

Edit maybe for close ****** male pipe fittings?

 

[Packard V8]

What are the interiors - threaded or straight? What diameter(s)?

jack vines

 

[rlitman]

Mini log splitters?

 

[2oolhound]

I'm with the buffer mops crowd. There are 2 types, those that use set screws onto the grinder shaft and those that screw onto the grinder shaft threads (yours) They make em in left and right threads. I'm interested in them if you want to sell them.

 

[Skysurfer]

What are the interiors - threaded or straight? What diameter(s)?

jack vines

No interiors, these are solid through and through. It's strange there are no markings for size or manufacturer either.

Interesting idea bluebolt, something I hadn't thought of.

 

[Steevo]

They are for breaking open chastity belts. I think Tampa has a collection of them in various pitches, diameters and thread variations for all manner of European, Asian, Roman, British, and Early American chastity belts.
But he says he just "collects" them . . . .

 

[gungatim]

Mini log splitters?

the more I think about it, those may actually work, put them in an impact and buzz them in the side of a piece of woood...

 

[twertsy]

Self threading tapered screw plug. Used to stop leaks in steel tanks or pipelines.

 

[Skysurfer]

Self threading tapered screw plug. Used to stop leaks in steel tanks or pipelines.

That makes sense knowing the owner worked the oil fields. You can see in the picture that the head of the largest one is buggered a little bit by a slipped wrench, something I could see happening during the panic of trying to stop a leak. Thanks twertsy.

Anybody want these? I'm guessing USPS shipping would be in the $5-10 range depending on distance and I'm on the west coast.

 

[j p smith]

Self threading tapered screw plug. Used to stop leaks in steel tanks or pipelines.

I think twertsy has got it right!

Check this out, this is what I was thinking of,

http://www.locknstitch.com/engines-casting-repair-industry.html

 

[ddawg16]

They are for breaking open chastity belts. I think Tampa has a collection of them in various pitches, diameters and thread variations for all manner of European, Asian, Roman, British, and Early American chastity belts.
But he says he just "collects" them . . . .

You beat me to it....while Tampa is just beating it.

 

[rlitman]

the more I think about it, those may actually work, put them in an impact and buzz them in the side of a piece of woood...

If they were about twice that size that's not a bad idea. They look like the ones that are meant to bolt onto a brake rotor, but I think at only 1" diameter, you're more likely to get stuck than to split much.