Tool Talk

What's-It Forum => What's-It Forum => Topic started by: oldtools on July 13, 2015, 12:41:59 PM

Title: flatten tapers drills
Post by: oldtools on July 13, 2015, 12:41:59 PM

Found 2 brace type drills with unusual drive heads, flatten tapers.. doesn't look like it would fit into a regular brace (square taper)..  what type of tool is used to drive these drills?   anyone  know or seen these type of drills?

Title: Re: flatten tapers drills
Post by: PFSchaffner on July 13, 2015, 03:52:59 PM

I don't know but I have some too.

Title: Re: flatten tapers drills
Post by: oldtools on July 15, 2015, 01:11:15 PM

Closer look...  looks like they were hand ground, not factory machined..  why?

Title: Re: flatten tapers drills
Post by: PFSchaffner on July 20, 2015, 08:59:20 AM

I finally dug one out. It certainly *appears* to have been machine-made (i.e. not modified), but one never knows. For one thing, the broad surface has a stamped marking on one side (the other side has an off-center detent-style hole). The marking is difficult to make out, but says something like:

  PREUHER
    THIEL

"THIEL" is quite clear. The first word much less so. Indicating degrees of uncertainty with layers of parens, I'd transcribe as

PR(E)((U))(((H)))ER

This means nothing to me.

(http://)

Title: Re: flatten tapers drills
Post by: PFSchaffner on July 20, 2015, 09:05:54 AM

and here's the 'detent' hole and the narrow edge:

(http://)

Title: Re: flatten tapers drills
Post by: john k on July 20, 2015, 01:22:09 PM

I wonder if these were made not for a brace drill, but for a wooden  Tee handle drill?  Especially with the European sounding name, brace drills were not as common over there.

Title: Re: flatten tapers drills
Post by: Billman49 on July 20, 2015, 05:16:13 PM

I was just thinking the same thing, but you posted while I was watching TV...

Title: Re: flatten tapers drills
Post by: oldtools on July 23, 2015, 06:53:39 PM

Thanks guys, makes sense..  hopefully someone knows for sure what they are...

Title: Re: flatten tapers drills
Post by: Chillylulu on August 18, 2015, 06:58:16 PM

Some braces didn't have adjustable collets, but they did have a wing nut or set screw.

My swag is a fixed collet that fit these ends.

Chilly.