Drilling a square hole...not impossible.

[Boyd]

Chinese figured it out. (Sorry if this is old.)

http://m.youtube.com/#/watch?deskto...e.com/watch?v=ALiqAXiTQBg&v=ALiqAXiTQBg&gl=US

 

[Boyd]

At the one minute mark they slow the video down and show the bit working close up.

 

[zoomzoomjeff]

Link didn't work properly for me. It brings me to Youtube, but to somebody's youtube desktop or something.

 

[ibedayank]

been done for over 50 years.....nothing new
mortis

 

[ishiboo]

Chinese figured it out. (Sorry if this is old.)

http://m.youtube.com/#/watch?deskto...e.com/watch?v=ALiqAXiTQBg&v=ALiqAXiTQBg&gl=US

Correct link is

It has been done for a while, still impressive though

 

[dirttracker18]

Boy they sure know how to make an exciting presentaton????

Cool idea, boring show. I think that is suppose to be an ad.

 

[Trey T]

those corner looks very sharp, sharper than mortising bit w/o the corner knife

 

[Twiggss]

or just use a broacher attachment

 

[Steevo]

Wow. Never seen anything like that for metal.
I bet that machine is $pendy.

 

[ihredo4]

I saw that done in an aircraft shop back un 1990. Just starting into the machine trades and that blew my mind. lol. Have not seen it since. Thanks for the link.

 

[outcast]

Link didn't work properly for me. It brings me to Youtube, but to somebody's youtube desktop or something.

same here . i would like to see it.

 

[Thruxton]

Try a search on "Harry Watt square drill bit" - this idea has been around for a VERY long time.

 

[MoToys]

Wow. Never seen anything like that for metal.
I bet that machine is $pendy.

Why? Don't think you could just pop the bit in a 18volt dewalt?

 

[Kroggers]

That is cool - is it just the drill bit you need or a complete special machine?

 

[busted knuckle]

It's an attachment and three point end mill. That was the first thing I was shown how to do when I started in the Machinist trade back in 1972.

 

[kmacht]

Anybody have a link as to where to buy one of these bits?

Keith

 

[NUTTSGT]

Chinese figured it out. (Sorry if this is old.)

More like the Chinese copied the idea from somebody else.


Technically it's not a drill bit, it's being machined out, as the round hole was already drilled.

 

[SuperSocket]

This is an American idea developed by Harry Watt, who is based out of Wilmerding, Pennsylvania, USA. They were known as the Watt brothers.


They based their drill design on the Reuleaux triangle which was discovered by Franz Reuleaux of Germany.



Chinese just copied it... as usual.

 

[SuperSocket]

Anybody have a link as to where to buy one of these bits?

Keith

It's not just a bit, it is an entire setup.. see link:

 

[NitroPress]

or just use a broacher attachment

Broaching can deform the workpiece. Being a form of drilling/milling, this could do the job on much more delicate pieces.

 

[pro machine Engineering]

That interest me I wonder if it can be used to cut a hex head with sharp corners. It has to be programmed to follow a square cutter path

 

[suntex01]

Chinese figured it out. (Sorry if this is old.)

http://m.youtube.com/#/watch?deskto...e.com/watch?v=ALiqAXiTQBg&v=ALiqAXiTQBg&gl=US

Might seem moot but this is Japanese and not Chinese.

I can read both...

And you really dont need all that attachment.
As long as you have an off-centered 3 point mill bit you should be able to do it.

 

[AussieDan]

How do you figure? If you just spin a 3-point bit you'll end up with a circular hole. The magic is in how the rotation of the bit is synchronized with the circular movement of the entire bit.

 

[justanengineer]

The link didnt work for me either, but Im familiar with Harry Watt's work. If I need to put strange internal shapes into material with sharp corners, Ive got a small shaper, and want either a larger one or a planer.

 

[coldfusion21]

Look up a rotary broach. Can make all sorts of shapes on a regular (CNC) lathe.

It's how a shop I used to work for would cut internal hex's into hydraulic parts. Pretty neat

 

[Morrisman]

Try a search on "Harry Watt square drill bit" - this idea has been around for a VERY long time.

We had one when I was an machine shop apprentice, back in the late seventies.

 

[rodm1]

Thanks that is the best video I've seen on this. They are known to cut tapered holes not good for high accuracy work.

 

[Nova_Guy]

This drill square holes. Its in a Ripleys Believe it or Not Museum. It uses a couple of different cutter bits. The sign with said it cut many different shapes including a star shape in just about any material. The cutter bits could be swapped or moved around using different holders.