Drill or Brace Attachment what is it ?

[rustyric]

Here is my latest find, I assume looking at the tapered fitting at the end it's an attachment for a drill brace to do a special task of some sort.

[lptools]

Hello, Rustyric. That is a chain drill. From a Millers Falls catalog; "An auxiliary tool for use with a breast drill or bit brace when extra power is needed, or where pressure cannot be easily applied". I am not sure of the maker of yours, doesn't look like a Millers Falls. There were probably quite a few makers of this type attachment, some complex, with a self-feed. Regards, Lou

[Northwoods]

How does it operate?

[lptools]

I believe you would wrap the chain around whatever you are drilling, and hook it back to the open lug on the hub. The hub would not turn, but the feed screw would advance the bit (and the feed screw & chuck) into the work.  Regards, Lou

[Bill Houghton]

I believe you would wrap the chain around whatever you are drilling, and hook it back to the open lug on the hub. The hub would not turn, but the feed screw would advance the bit (and the feed screw & chuck) into the work.  Regards, Lou

That's my understanding.  Generally used in commercial settings and for boring holes in beams, pipes, etc.

[Plyerman]

I believe you would wrap the chain around whatever you are drilling, and hook it back to the open lug on the hub. The hub would not turn, but the feed screw would advance the bit (and the feed screw & chuck) into the work.  Regards, Lou

That's my understanding.  Generally used in commercial settings and for boring holes in beams, pipes, etc.

Wow. I bet things got real exciting if you didn't pay attention and let the screw run out of stroke!

[john k]

These are great for drilling while up on a ladder, where you cannot push on the drill.  Can always make the chain longer to go around poles, beams,etc.  Have several and use one once in awhile. 

[lptools]

Hello, John. Thanks for posting a photo of the Chain Drill set up for use. Regards, Lou

[rustyric]

Yes many thanks you have solved the puzzle

[Plyerman]

Ah, silly me. I always tried to picture one of those things on a drill press. Never considered that they were probably designed for bit and brace work. Doh.