Wassat?

[Hawkeye]

Okay, guys. I got this little piece in with the tooling for the Victoria. It was in a block holding a couple of indexable cutters, so it seems like he wanted to have it fairly handy.

The shank is 1" and fits nicely in a collet. It only sticks out about 3/4" past the collar.

The shank itself is drilled through at 1/4", but widens out to 9/32 for the 'bottom' half inch. The side hole is 13/32" and goes exactly half-way through - flat-bottomed rather than drill point. The setscrew isn't long enough to go all the way to a 1/4" tool mounted in the shank, if it's some kind of endmill holder.

If that's what it is, could there be a plunger for the side hole missing?

The finish strikes me as more factory than shop-built. Anyone seen something like this before?

 

[joe_m]

What part are you calling shank/collet/collar?

Is the hole in the bigger of the two pieces perfectly drilled or is it off a smidge so that when the second piece is inserted into it the second piece is out of alignment by a degree or two? (Is it maybe a home-made broach?)

I'm stumped and I've pulled a lot of metal "things" out of the bottoms of a LOT of old machinist chests.

Joe

 

[Hawkeye]

The shank is the smaller shaft sticking out of the larger collar, which has the setscrew. The collet is on the vertical spindle of the mill and, I assume, is where this thing is meant to be mounted in use.