What is this tool called

[LoneGunman]

This came with my Atlas lathe I bought 7 or 8 years ago, I'm parting it out and came across it while going through stuff. Obviously it's for drilling holes in wood but what is it meant to attach to and what is it called?

 

[Zrexxer]

It's a hollow chisel mortising attachment for a drill press.

 

[dustin19]

zrexxer hit it nail on the head........

 

[charlie_nj]

Yep, it drills a square hole.

 

[gte718p]

I believe they are generally called mortising drills or adpters. The most common use is to cut the Mortis for a mortis and tenion joint.

 

[tonydanzah]

how do you "drill" a square hole?

 

[rsanter]

how do you "drill" a square hole?

hollow chisel mortising attachment
the drill bit in the middle hollows out the center of the hole
the chisel cuts the hole square

bob

 

[lt1guy97]

Cool, learn something everyday.

 

[addison]

Cool, learn something everyday.

Yeah, that's what I am here for. Who wouldn't like to some to terms with something new everyday.

 

[ihredo4]

Damn that means I can go back to bed already. My quota is done for the day.

 

[fordbroncodave]

made for drilling square holes to complete a mortis and tennon joint

 

[srmofo]

how do you "drill" a square hole?

like this

 

[LoneGunman]

like this

I still don't see how it works, I mean if obviously does but I don't get how. LOL yeah, I was that kid, always had to know why or how not just it does.

 

[dustin19]

as u pull down on the lever it lowers the drill.. the bit cuts the center out and the square tube u see all goes down with it and squares it up.

 

[4StarCstms]

maybe this will help, this is a dedicated machine thou,

 

[srmofo]

I still don't see how it works, I mean if obviously does but I don't get how. LOL yeah, I was that kid, always had to know why or how not just it does.

the chisel drills are for wood. They drill a hole and the chisel makes it square.

The clips Im posting are for steel, the crank of it turns kinda oblong similar to the way a rotary engine moves