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General control line discussion => Open Forum => Topic started by: Robert Zambelli on February 18, 2021, 03:48:43 PM


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Title: Unusual Drill - Square?????
Post by: Robert Zambelli on February 18, 2021, 03:48:43 PM
Check this out - anyone ever use one?

Bob Z.

  https://sanrico.com/products/easysquare-drill-bit-set?pp=0&epik=dj0yJnU9R2gxVy1wOFlPeTJIakw4SHNqSTN2QWt2dE5mWW5hVlomcD0xJm49akkzdTc1R0JVWUlWZVdmY2ExRXRJQSZ0PUFBQUFBR0F1OENj

Title: Re: Unusual Drill - Square?????
Post by: Tom Luciano on February 18, 2021, 04:03:06 PM
Mortising bit!
Title: Re: Unusual Drill - Square?????
Post by: Motorman on February 18, 2021, 04:37:35 PM
Might not work so good in 6 Lb. balsa.


Motorman 8)
Title: Re: Unusual Drill - Square?????
Post by: De Hill on February 18, 2021, 04:54:25 PM
When I was in the 8th grade, (1955) our wood shop instructor showed us one of these, and told us it would drill a square hole.

I have never seen one in action, though.
Title: Re: Unusual Drill - Square?????
Post by: Chuck Matheny on February 18, 2021, 05:06:03 PM
I just watched a Home Machinist video on the same subject for how to make a square hole lengthwise through round stock [and without the proper tool]

Here is some "problem solver" hardware for poorly drilled holes........
Title: Re: Unusual Drill - Square?????
Post by: Gerald Arana on February 18, 2021, 07:19:54 PM
Check this out - anyone ever use one?

Bob Z.

  https://sanrico.com/products/easysquare-drill-bit-set?pp=0&epik=dj0yJnU9R2gxVy1wOFlPeTJIakw4SHNqSTN2QWt2dE5mWW5hVlomcD0xJm49akkzdTc1R0JVWUlWZVdmY2ExRXRJQSZ0PUFBQUFBR0F1OENj

Yes. It's for mortise & tenon. I used one in high school wood shop back in '58

Makes a square hole when used in a drill press.

Jerry
Title: Re: Unusual Drill - Square?????
Post by: Bruce Shipp on February 18, 2021, 08:43:22 PM
We used them in 7th grade shop class, 1976. Only on Iíve ever seen or used.
Title: Re: Unusual Drill - Square?????
Post by: Air Ministry . on February 18, 2021, 09:36:40 PM
Where do you get the square bolts to fit .
Title: Re: Unusual Drill - Square?????
Post by: Robert Whitley on February 18, 2021, 10:57:09 PM
I used them a fair bit in dedicated mortising machines during my cabinet making days.
The drill press attachment ones are kind of a pain to set up but are easier than hand chopping mortices for the occasional furniture making home project.
Title: Re: Unusual Drill - Square?????
Post by: katana on February 19, 2021, 04:50:49 AM
Try it in metal and find out its limitations LOL! Its only a round drill inside a hollow, square broaching chisel - FOR WOOD !
Title: Re: Unusual Drill - Square?????
Post by: Steve Dwyer on February 19, 2021, 05:23:28 AM
Robert Z.

The concept has been around for years. Early on the old furniture makers would auger out a hole followed with using a mortising chisel to square it up; a visit to Maine to a cabinets makers shop and you will still find some artists at work making square holes by hand. Note from the photo the course drill for hauling out the material leaving a thin wall for the beveled squaring tool to follow and collapse the remaining material inward for removal.

The photos here show what looks like soft pine and another fiber or particleboard?? Unless the tool is made from high-quality hardened steel its longevity will be questionable, the true test is holing out Hard Maple or Grey Elm. Restoring (sharpening) the square tools' inside edges may pose a challenge as well especially at the inside corners. Go to Rockler Tools first and check out theirs before buying here. Just a suggestion, good luck if you are making a purchase. Wear an n-95 in that shop as well.

Steve
Title: Re: Unusual Drill - Square?????
Post by: Brett Buck on February 19, 2021, 11:03:27 AM
Robert Z.

The concept has been around for years. Early on the old furniture makers would auger out a hole followed with using a mortising chisel to square it up; a visit to Maine to a cabinets makers shop and you will still find some artists at work making square holes by hand. Note from the photo the course drill for hauling out the material leaving a thin wall for the beveled squaring tool to follow and collapse the remaining material inward for removal.


   That's still probably the right option unless you are doing a lot of them. This mortising bit (in a drill press or dedicated mortising machine) makes sense when you have a lot of long mortises to do, like a production system, or very large or multiple home projects. For occasionally projects, setting it up and aligning takes longer than just drilling holes and squaring them out manually.

   I did a lot of woodworking back in the day (when I had access to a shop), and like everyone else, the only time I used such a device was in a college woodworking class.

    Brett
Title: Re: Unusual Drill - Square?????
Post by: Steve Dwyer on February 19, 2021, 01:59:29 PM
The requirement for most tenons in furniture building is less than an inch, any longer it's of little value. I'd say the reason this mortising tool is this long is for accessibility around the jig. If you had to make mortise holes all day in a shop I'd say definitely use this tool or find another job.
Title: Re: Unusual Drill - Square?????
Post by: Robert Zambelli on February 19, 2021, 06:35:21 PM
Oh, well - looked interesting to me!
Never saw anything like it before.
Bob Z.
Title: Re: Unusual Drill - Square?????
Post by: Dave Hull on February 19, 2021, 11:18:57 PM
There's also a wobbly drill or oscillating drill that will do the same, but it best suited to a milling machine or stiff drill press. Not a hand tool, but then, neither is a mortising bit....

https://www.youtube.com/watch?v=rjckF0-VeGI


When drilling holes in thin sheet, like aluminum aircraft skins, a regular 2-flute drill wants to make a triangular hole. The video shows how this can be a "feature" instead of a defect...

The Divot
Title: Re: Unusual Drill - Square?????
Post by: don boka on February 20, 2021, 07:24:44 AM
Wow! I always thought it was used with a hammer !