What is this? Lathe, mill, other?

[ARC-170]

I got this with some lathe and milling machine tooling. Anyone know what it is?

 

[darkzero]

Lol, I just seen this posted on another forum. Now I know why your avatar is familiar whenever I see it over there.

 

[mickri]

Looks like some type of piloted countersink.

 

[Peyton Price 17]

For rivets in aircraft. I assume that one is carbide too. I have the same one.

 

[ARC-170]

For rivets in aircraft. I assume that one is carbide too. I have the same one.

How is it used? I looked up aircraft riveting tools and didn't see anything.

 

[ARC-170]

Lol, I just seen this posted on another forum. Now I know why your avatar is familiar whenever I see it over there.

Ha! Pretty funny! I wondered if anyone else looked at GJ and this one. Seems like it would be more common. I use Star Wars spaceships and designations for my avatars.

 

[ARC-170]

Looks like some type of piloted countersink.

I thought so, too, but the edges, while sharp, don't seem "cutter-bit" sharp. I thought maybe something went in the cut-out, but there's nothing to hold it there.

 

[Peyton Price 17]

my pa used to use them at lochead martin when building planes.

 

[ARC-170]

my pa used to use them at lochead martin when building planes.

Do you know specifically what he did with them? Were they used to countersink holes, deburr, used as some sort of hammer bit, or something else?

 

[Peyton Price 17]

I think it was a countersink for some kind of rivet. The other ones are micrometer adjusted.