Chinese Drill Bit Drills Square Holes

gr8mesquite · Post by **gr8mesquite** » Mon Oct 17, 2011 6:43 pm

Check this out, you'll be amazed:

http://www.liveleak.com/view?i=78a_1317942353

Is this Photoshop-ed, or real? The mortise of the future?

Jerome

joedw00 · Post by **joedw00** » Mon Oct 17, 2011 7:42 pm

It doesn't look Photoshopped, but sure looks like a lot of vibration. That is weird how it does it.

dusty · Post by **dusty** » Mon Oct 17, 2011 7:46 pm

If it is real it is INNOVATIVE.

It doesn't appear to me to be a drill bit though. It is more like a chisel or a router.

djmartins · Post by **djmartins** » Mon Oct 17, 2011 8:19 pm

Old, OLD tech.....

JPG · Post by **JPG** » Mon Oct 17, 2011 8:47 pm

Actually this tells it better than slow motion.

[ATTACH]14511[/ATTACH]

Notice the center of the triangle is rotating off center and the corners opposite the cutting corner ride the side of the square.

Gotta wonder how hole gets started.

Certainly not a 'drill bit' in the traditional sense, but it does appear to 'make' holes!

Shaper comes to mind as a descriptor!(in the metal working sense like a ram shaper that follows a square path)

Slight rounding at the 'corners'.

paulmcohen · Post by **paulmcohen** » Mon Oct 17, 2011 11:49 pm

JPG40504 wrote: Gotta wonder how hole gets started.

If you look at the video, it starts with a round hole.

JPG · Post by **JPG** » Tue Oct 18, 2011 12:19 am

paulmcohen wrote:If you look at the video, it starts with a round hole.

The video shows a round hole, but I believe that is to make less material removal necessary when making the square hole.

There is nothing that I see that registers over that hole(as part of the bit).

I have to conclude that the hole does not determine the location of the square hole, but the positioning of the bit is all that determines that.

That leads me to believe the 'bit' merely starts its wiggle dance as it contacts the material being 'drilled'. The triangular cutter cannot reach outside the square sides.

paulmcohen · Post by **paulmcohen** » Tue Oct 18, 2011 12:44 am

JPG40504 wrote:The video shows a round hole, but I believe that is to make less material removal necessary when making the square hole.

There is nothing that I see that registers over that hole(as part of the bit).

I have to conclude that the hole does not determine the location of the square hole, but the positioning of the bit is all that determines that.

That leads me to believe the 'bit' merely starts its wiggle dance as it contacts the material being 'drilled'. The triangular cutter cannot reach outside the square sides.

I did not mean to say the round hole was used for alignment, the machine looks like some kind of CNC machine so registration is done by the X-Y position mechanism.

holsgo · Post by **holsgo** » Tue Oct 18, 2011 7:13 am

I've seen that on metalworking forums. Not uncommon. They have wobble bits like that for hex shapes as well I think. Very cool.

wiredone · Post by **wiredone** » Tue Oct 18, 2011 9:50 am

I believe the round hole is there (and has to be there) because the tool is not capable of cutting in the center, which is not uncommon in certain metal working applications.