Are you kidding me!

[jay_kent]

Drilling square and hexagon holes

Square
square hole drilling on a drill press

Hexagon
hexagon hole drilling on a lathe with the Vika attachment.

The theory
Drilling a square hole! (www.howround.com)

 

[66replica]

The theory video reminds me of a mini rotary engine.

 

[Ringo]

Yeah it does, doesn't it.

It doesn't look like the bit in the theory vid even gets that close to the corners though... What's up with that?

 

[Flugtechnik]

Cool, just remember not to use them on your bike on any structural member.

Remember this?
http://www.dotheton.com/forum/index.php?topic=7523.msg65684#msg65684

 

[jay_kent]

Yeah it does, doesn't it.

It doesn't look like the bit in the theory vid even gets that close to the corners though... What's up with that?

I think that's just the mechanism to make the bit go in a square.

Here's a better explanation. Still won't get you those square corners though

Сверление квадратных отверстий.

 

[Useful Idiot]

I dont know about this...

 

[Swapmeet Louie]

Thats wild! Look @ how much "run-out" is in the chuck of the 1st video! It's maybe close, But I wouldn't think it would be "square" because of that...? Though I am no engineer.

 

[JA-Moo]

Thats wild! Look @ how much "run-out" is in the chuck of the 1st video! It's maybe close, But I wouldn't think it would be "square" because of that...? Though I am no engineer.

That's not run-out, the cutter is being "cammed" so to cut the flalt sided holes.

 

[Swapmeet Louie]

That's not run-out, the cutter is being "cammed" so to cut the flalt sided holes.

Oh shit, your right... For a second I was thinking, "My shitty drill press has tons of run-out, maybe I should start drilling square holes instead of oval ones" ha ha...

 

[thebronze]

HUH???? That was trippy

 

[Tripler]

But I wouldn't think it would be "square" because of that...? Though I am no engineer




Nor am i, but,I would think it would be finished off with a broach.

 

[Rocan]

makes sense to me.

 

[Jared]

WITCHCRAFT! This ain't fuckin hogwarts take your hexagon hole drilling spells out of here!

 

[Big R]

Impressive........but I want to see a square bolt to go in it now.

 

[crazypj]

There was an article on drilling square holes with triangular drills several years ago in 'Model Engineers Workshop' magazine.
Went into a lot of detail over 2~3 issues