What's it

[snoopdog]

Has me stumped, some kind of offset, drill holder?

 

[Winegrower]

A harmonic motion cam, perhaps? Like maybe the back offset for a box brake?

 

[mmcmdl]

Maybe not it's intended use but , I made these for smallerish boring bars . You can rotate this cam holder to bring the bars onto centerline and lock it up . It's a very useful tool when using small bars in a larger holder .

 

[snoopdog]

It was in one of the drawers of my drill sharpener, of course that means anything , but maybe a clue.

 

[mmcmdl]

It could be someone's first attempt of turning in a 4 jaw if his indicator was broken , but I hope this wasn't the case .

 

[snoopdog]

It could be someone's first attempt of turning in a 4 jaw if his indicator was broken , but I hope this wasn't the case .

It does fit in a boring tool holder, I had to check!

 

[snoopdog]

 

[mmcmdl]

I have a slitting saw holder from the same outfit which is a quality piece , so I think you have something here .

 

[Eyerelief]

APT = Alvord Polk Tool?

 

[mattthemuppet2]

They make allot of boring bars, so my guess would be an offset boring bar holder for a turret lathe