I was actually searching how to drill square holes for a project on a go cart... I think a regular bit and files will be cheaper and more efficient for me though.
This is actually from a TV program, "Mathematical Etudes". I remember this exact episode, it had sound, explaining how and why this works, mostly in formulas, but thoroughly (that episode also had material about cycloids and something else I've missed for being late), each part started with a question and some time to think ("is it possible to drill a square hole" in this one, obviously) rather than "look, this works!". It was aired at least once on a children-oriented channel (granted, at ~21:00, but still, teens are usually awake at that point), and I'm more than sure that it got more kids interested in maths than just me.
+Wheresmy240 This is not a new technology lol, You have a lot of different shapes and sizes you can drill. Just search for drilling square hole . Its just this simple and you have a lot of drill bits that do much more than just this shit.
Fantastic physics. The first time I drilled square holes was in 1957. Making square holes in boring bars for square tool bits. The majority of those holes, were for 1/4, 3/8, and 1/2 inch HSS tooling bits. Most of the bars I did, were square bored at 90* and 45*. Drill press was essential for good results.
you could put a regular drill in the front of the device, so you basically drill a small round hole in the middle first, as a guidance. this will keep make the system steady when cutting the square
You guys can say what you want but im a custom cutting tool grinder and ive personally made hundreds of triangular 3 flute (straight flute) end cutting only drills made specifically for this operation. They dont look exactly like whats pictured because they actually would bite into the part and walk but this animation does depict how they do it.
Cool video! Great animation! I'm so grateful for the amount of quality information available for free on the internet! You are one of the people responsible for that! Thanks!
As an engineering apprentice at The Main Roads Dept, Nundah, Brisbane, Australia in the early 1960's, one of my jobs was to drill countersunk, square bottomed holes for bolting on the cutting edges of road graders mouldboards.(Blades)These cutting edges are bolted on using high tensile steel, countersunk round head, square neck bolts.The cutting edge itself is of high tensile steel.We used a radial drill press with a quick change drill holder to drill these holes.First a 9/16 hole was drilled through the steel using a conventional high speed twist drillThis was then countersunk to depth with another conventional high speed twist drill with the end ground to 90 degrees included angle.A hardened square guide was then fixed in place over the hole and a curved side triangular high speed steel drill same sectional shape as in diagram in video was used to drill the bottom of the hole square. The whole drill was a sold curved sided triangle and not like the depiction of the end of the drill as shown for cutting square holes in wood. The tips of the curved sided triangular drill were sharpened to give a cutting edge and then used to drill the bottom of the countersunk hole to 3/4 inch square.The corners of the square hole had a small radius as in the diagram - but no more than about 1 mm radius.The top of this drill was in a holder that kept it vertical but also allowed the corners of the bit to follow the edges of the square guide.I drilled thousands of square holes in these cutting edges as an apprentice.Since that time I have never seen another one of these drills nor have I ever met anyone else other than my fellow apprentices who have seen or used one of these devices - so it would appear they are pretty rare.
you prefer the router and bearing heads? it's the same concept just achieved differently with a solid piece of tooling, not divided into three easy "marketing" tools to rip off the consumer and profiteer off convenience…evil
lol evil is a perspective, i'm just tired of profiteers of convenience, it's a slavery tactic. not like you could understand, you're die hard capitalist.
I didn’t find the edge of the preserve until I saw a monkey on a motorcycle try to kidnap a human child. As I saw the monkey release the child and run when a human adult came to help the child, I knew I was at the end of the road.
Not so surprising: when learning Chinese, we learn that a square is drawn with 3 strokes... Then why Chinese people haven't thought of drilling a square hole that way?
AvatarLand Razer no it's because unless the class is my major, or it's something that is going to help me in the real world, it's useless and I just need the credit
If you have room for a mill, power for a mill, a fork lift, (or access to one,) and the skill to move a 2000 pound mill, and finally, a saw to get into the corners to clean out the material that even the smallest of drill bits or end mills is going to leave since I have yet to see a square drill bit. On the other hand, ANY excuse to acquire a Knee Mill is a great one!
We could all save a lot of time if the people who came up with such brilliant theoretical ideas had a little practical real-world experience. This is a good way to break your wrist and take out an eye at the same time.
Even more interesting to me than the results (a square hole) is how and the WAY this was discovered/invented,, Probably illistrated using advanced 3d program such as AutoCad or Microstation ? the inventor(s) would still need a good knowledge of mechanical engineering, geometry, woodshop techniques, drafting/design (which was my specialty btw) along with the 'how to' /inventive logical skill, what is the incentive? who would hold the patent for this if there is one?
Leroy D Brown Harry Watt's square drill (google US1241176 ) is very different, and has no off-center rotations. It has a stationary square housing, with sharp corners that chisel the wood away from the corners, and a central bore/auger bit which removes the middle and all the chippings. You can get them at Lee Valley tools. It requires a drill press (because of the force needed to drive the chisels) and there's a special clamp to hold the housing still as the drill rotates.
I'd agree that's true, but it's not evidenced by Watt's patent, which doesn't use a triangle or similar means. I'd be interested to see a patent that does if you know of one.
no that is the method first used to drill square holes using drill presses in steel plates for the ties. the spikes would then go through the square hole-so you are talking 1800-s
VERY cool. I gave a report in high school on the function of a Wankel rotary engine (WAY before Mazda used one!) And that had a rounded triangle moving in an oval combustion chamber. Nifty geometry.
No because it does not make a true square hole, the curved edges make it not perfect for what most people want. But im sure you could find one some where on the internet
TheBridgeProduction1 well it makes squares all right (just use a saw or a dented knife to cut out the small round edges), still much better than nothing at all.
For anyone wondering the shape is Reuleaux Triangle and based on constant curve width. "In principle", it should as shown. (Maybe with a little difference in speed)
This is a Whitney style square hole cutter, used them for 20+ years at Pattin Manufacturing, 1980s, making does for 1-1/8" square heading does for mine bolts. Procedure; Drill 1-1/8" round hole in die blank, floating chuck and 3 flute square drill, with 1-1/8 hardened template to guide square drill to through die. Radius in corners larger then bolt spec. Shave corners with 1.125" square on manual broach press. Plug at back of die controls head height, as well as stencils bolt length", material dia./strength, manufacturer code. Heattreated A2 and h13 in our own electric oven. All of my machinist have passed, but the new kid, shop foreman learned from the old guys, how do squares and hex shaped dies, before learning EDM and machining center tooling.
+Que Sero its impossible do drill a perfectly square hole, there will always be a round corner, you can just make the corner's radius smaller with more refining.
That's still not a square. If someone can develop a rotating tool that will cut an actual square with 90 degree corners and not rounded ones then I will be amazed.
Actually it's not possible to create any material square without any roundings at the corners. There will always be a curve at the edges, no matter what tool is used.
Except if you use a keyway broach because those don't rotate, they have a series of teeth increasing in height that shave off portions of the material as they are pressed in through the collar. Those cut edges so sharp they'll slice right through your flesh.
well then I suggest ordering it .... from russia if you find it there :D but I am sure this very, very advanced technology - nay even more - nano giga extra technology, is available in the US as well ;)
Jeff H. Wow! this has 4 equal length sides, where is it dictated that a square must have sharp corners? so if i sandpaper the corners on my square coffee table so nobody hurts themself on it does that make it no longer a square table? what shape is it then? BHP bluescope is the largest steel producer in the world and they sell radius edge square tubing...Alcoa is the largest aluminium extrusions in the world and guess what? they sell radius edge square alloy tubing....i know because i use it everyday.....maybe you could enlighten me with your wisdom? what is this shape then? i'll be sure to pass it on to BHP & Alcoa so they can correct there product listings....PS. my suzuki RMZ450 motocross bike has 'according to the manual' a radius edge square tube alloy frame cradle...draw a sharp edge square on a piece of paper with a pencil then look at the corners with a magnify glass & guess what? they be slightly rounded "radius".... Right angle can also have a radius edge...So what is this shape then?
Jeff H. the issue was not how to cut the hole for tube i use.....i already know that i own milling machines & lathes....still waiting for the name of this shape?
I have a test in a could of days and instead of studying I'm watching this, i don't even know how I got here and I don't even need to drill any damn square holes
Its even better than that. If you look closely at the drill, the shaft has a couple of universal joints in it. That would mean the cutting part wouldn't remain on it's axis. The whole thing would flail around in a most entertaining way! (for one who was watching...)
It needs to be pointy like a step drill, a way to center it can be to pre cut a round groove with a cupdrill in the center of where you want the hole to be, the diameter of the round grove will guide the tip of the drill.
Reuleaux tetrahedron is one application of this. The Reuleaux triangle formed by three intersecting circles is the result of this drill. The mechanism is very practical to drill square fits with different depths. This is highly technical like the Brachistochrone curve and the Tautochrone curve applications. These are mechanical curves for pinions, gears and machinery. In essence we want ways to apply torque on hard reaching spots.
That's right! It goes in the square hole!
*dissapointed kindergarten teacher noises*
That’s probably one of the funniest videos I’ve ever seen
I'm not the only one that found myself here
That's probably why youtube sent me here
Lmfao
Thats right! The square hole!
Where does the arch go
@@ugh_industryy3716 thats right! The square hole
@@CivicallyNotDan The Rock:🤨
Someone else on a random video streak, or did somebody just search for "How to drill a Square Hole"?
***** hahahahahaha
***** Me too. Ha.
I got here from watching QI.
I was actually searching how to drill square holes for a project on a go cart... I think a regular bit and files will be cheaper and more efficient for me though.
Taylor Gibson unless your go kart made out of wood, good luck finding a drill or a bit like that capable of going through steel...
This is actually from a TV program, "Mathematical Etudes". I remember this exact episode, it had sound, explaining how and why this works, mostly in formulas, but thoroughly (that episode also had material about cycloids and something else I've missed for being late), each part started with a question and some time to think ("is it possible to drill a square hole" in this one, obviously) rather than "look, this works!". It was aired at least once on a children-oriented channel (granted, at ~21:00, but still, teens are usually awake at that point), and I'm more than sure that it got more kids interested in maths than just me.
TheLaXandro could you please tell me where i could find these episodes ?
me too
if anyone didn't know, this is mathematical etudes
so that's how Tien's Tri-Beam works
That's the spirit !
I'm just going to make triangles into fucking squares.
fuck you
And then the squares make a circle
XD
thats great now show the part where they drill a square hole
amen
+flaming mustache Exactly, In theory and design it looks good. In practice, I imagine it's going to take a little more than that.
+Wheresmy240 This is not a new technology lol, You have a lot of different shapes and sizes you can drill. Just search for drilling square hole . Its just this simple and you have a lot of drill bits that do much more than just this shit.
+flaming mustache i thought they were doing a triangle hole for some reason.
+flaming mustache and yeah, now that i did some research for 3minutes. i found out that you can drill about whatever shape you wish. look it up.
When I was an apprentice machinist, my German boss taught me how to do this and yes it did work to my amazement.
How to turn a sphere inside out?
Thats easy, hold my beer
lol
How to turn a cube inside out.
How to turn a line inside out?
How to divide by 0?
Is this drill made by mazda??
Good one...
I was thinking Rotary as Well
Wankel drillbit
*_ROTARY POWWWWEEEEERRRRRRR_*
Dorito engine yo
Fantastic physics.
The first time I drilled square holes was in 1957. Making square holes in boring bars for square tool bits. The majority of those holes, were for 1/4, 3/8, and 1/2 inch HSS tooling bits.
Most of the bars I did, were square bored at 90* and 45*.
Drill press was essential for good results.
Are you still alive
good luck holding that steady when the drill bit makes contact. Good concept though but there's a bit more engineering to be done here it seems.
you could put a regular drill in the front of the device, so you basically drill a small round hole in the middle first, as a guidance. this will keep make the system steady when cutting the square
Laurentiu Popa Like the way a paddle bit works. Great idea.
no part of the drill stays centured instead the hole thing goes arounnd and imaginry spot.
meaning no support bit could be used
*****
might be able to use this concept if you have a drill press and a vice clamping the material down.
The guide piece solves the whole thing.
*So then triclops come along and decides "I'm gonna turn circles into f*ing squares!!*
So that's how Tien does it...
You guys can say what you want but im a custom cutting tool grinder and ive personally made hundreds of triangular 3 flute (straight flute) end cutting only drills made specifically for this operation. They dont look exactly like whats pictured because they actually would bite into the part and walk but this animation does depict how they do it.
+mike lewinski Since you upload videos. Please video one of these tools working. please.
@@jonlanier_ ua-cam.com/video/DgB1psCFC7o/v-deo.html
Proof that anything fits in the square hole.
I got that in my Mazda Rx-7,
I like it a lot.
That rotary
BRAP BRAP BRAP BRAP BRAP BRAP BRAP BRAP BRAP BRAP BRAP BRAP BRAP BRAP BRAP BRAP BRAP BRAP
I don't know how I ended up here but it was worth it. :D
+Aakash Kalaria Same Here :D
+Aakash Kalaria there are some nice designs on facebook.com/workbenchplans?sk=app_190322544333196
+Giftburg Studios Thank you! :P
+ Sky Klria...Pareceque somos varios los que no sabemos que estamos haciendo acá..!!
I was actually researching how to drill a square hole with a not square bit and now I know.
Cool video! Great animation! I'm so grateful for the amount of quality information available for free on the internet! You are one of the people responsible for that! Thanks!
Now see this triangle? what hole fits this triangle? That’s right! It’s the square hole!
Or you could drill four round holes inside the corners and use a jigsaw.
+kingklabe Impossible.
I do it all the time, fool.
kingklabe Sarcasm my friend
Stupendous.
+kingklabe Haha! You gave me a good laugh, friend. Have a good day.
The way it moves is seriously satisfying
As an engineering apprentice at The Main Roads Dept, Nundah, Brisbane, Australia in the early 1960's, one of my jobs was to drill countersunk, square bottomed holes for bolting on the cutting edges of road graders mouldboards.(Blades)These cutting edges are bolted on using high tensile steel, countersunk round head, square neck bolts.The cutting edge itself is of high tensile steel.We used a radial drill press with a quick change drill holder to drill these holes.First a 9/16 hole was drilled through the steel using a conventional high speed twist drillThis was then countersunk to depth with another conventional high speed twist drill with the end ground to 90 degrees included angle.A hardened square guide was then fixed in place over the hole and a curved side triangular high speed steel drill same sectional shape as in diagram in video was used to drill the bottom of the hole square. The whole drill was a sold curved sided triangle and not like the depiction of the end of the drill as shown for cutting square holes in wood. The tips of the curved sided triangular drill were sharpened to give a cutting edge and then used to drill the bottom of the countersunk hole to 3/4 inch square.The corners of the square hole had a small radius as in the diagram - but no more than about 1 mm radius.The top of this drill was in a holder that kept it vertical but also allowed the corners of the bit to follow the edges of the square guide.I drilled thousands of square holes in these cutting edges as an apprentice.Since that time I have never seen another one of these drills nor have I ever met anyone else other than my fellow apprentices who have seen or used one of these devices - so it would appear they are pretty rare.
Surely this is something that has mass market capabilities? Do you know if the bits still exist? So cool.
Just because something works in a cartoon does not mean it will transfer to the real world so smoothly.
This would make a circle or oval, aahahaaha, idiot....What a waste of simulation time.
Dread Art this would clearly work...
it would, but there's to much going on for a one size square not good for marketing.
you prefer the router and bearing heads? it's the same concept just achieved differently with a solid piece of tooling, not divided into three easy "marketing" tools to rip off the consumer and profiteer off convenience…evil
lol evil is a perspective, i'm just tired of profiteers of convenience, it's a slavery tactic. not like you could understand, you're die hard capitalist.
why the fuck was this in my recommended.
I swear there's some guy who works at UA-cam and whenever he sees a video he likes he clicks a button and it goes to everyone's recommended.
Well what's worse, that or the fact that I actually searched for this?
im more interested in that crazy lookin drill-bit
seems liable to break
It goes in the square hole
That's right, it goes in the square hole
This video settles it, I have literally run out of internet.
I didn’t find the edge of the preserve until I saw a monkey on a motorcycle try to kidnap a human child. As I saw the monkey release the child and run when a human adult came to help the child, I knew I was at the end of the road.
And lastly we have the realeaux triangle, can you guess where it goes?
That's right, we use it to make another square hole
*Use triangle to make square. Illuminati confirmed* turu ruruu tutt tuttt..
So, Tien's Tri-Beam does make sense. So he didn't just turn triangles into f'n squares.
In kindergarten we learned that square looks a bit different than that.
Well, some teachers could be jerks, teaching false thing to make fun of kids.
Or maybe they showed them an actual square, and this video has no squares, you're dumb
It's technically not a square, but it's pretty close.
It's a squircle
It’s a square with rounded corners. No need to get so emotional over it.
why I'm here ?
Becasue random?
Tom Jones XD LOL ROFL LMMFAO LMAO!!!!!!!
*and he decides im just gonna turn triangles into frickin squares*
- Cell Dbza
So the kikohou is basically a giant drill
So this is what a "sort of triangular circle" looks like. :/
Thank you Stephen Frye!
Back on the dark side of youtube again...
"More like a squaricle" hahahaha that has me just rolling XD
Joker
Write what you want but soundtrack is just brilliant, never heard something that beautiful.
I was listening to Welcome To The Jungle while watching this. Getting ready to get bombarded by people saying who asked.
Q) how to drill a square hole?
A) with a triangle of course.
Yes provided the triangle has a hardened square die to rotate in ...
Not so surprising: when learning Chinese, we learn that a square is drawn with 3 strokes... Then why Chinese people haven't thought of drilling a square hole that way?
"Squares" don't have radiused corners.
That's an astonishingly convoluted way of doing something.
It's that time of the year again where we get recommended random videos like this on UA-cam.
A Mazda engine for your drill.
This is more educational than my college classes
just because you manage to pay attention for one and a half minute?
AvatarLand Razer no it's because unless the class is my major, or it's something that is going to help me in the real world, it's useless and I just need the credit
Awesome thank you for this incredible visualization of the cycloid and the curve for the off-center rotation of the bit. Kharasho.
It’s like I opened a vault to the past, and I can never un-open.
I got here because tien made a square hole with his tri-beam
more like a squircle
If you have room for a mill, power for a mill, a fork lift, (or access to one,) and the skill to move a 2000 pound mill, and finally, a saw to get into the corners to clean out the material that even the smallest of drill bits or end mills is going to leave since I have yet to see a square drill bit.
On the other hand, ANY excuse to acquire a Knee Mill is a great one!
Who could have guessed it, this is the secret power of the Rotary Engine.. That's why the Apex Seals are square.
Muito interessante,
Parabéns para quem teve a ideia de inventa essa broca.
Amigo agradeça muito a Deus por tê lhe concedido este
dom.Deus te abençoe.
Everything I've ever wanted to know
So this is how Tenshinhan did it.
Thank god, these day I am retired and only repair my hang gliders and they do not need any squear holes.. Cheers Mate, Pete
Reminds me of a rotary engine
***** any links on the geometry on reuleaux triangles and/or how to draw/design/construct them?
***** Actually the triangular rotors of Wankel engines aren't reuleaux triangles as they have flatter sides and thus don't have a constant width.
Rotary power!
A true square drill is triangular and leaves perfectly square corners.
We could all save a lot of time if the people who came up with such brilliant theoretical ideas had a little practical real-world experience. This is a good way to break your wrist and take out an eye at the same time.
Theory ≠ practice
Even more interesting to me than the results (a square hole) is how and the WAY this was discovered/invented,, Probably illistrated using advanced 3d program such as AutoCad or Microstation ? the inventor(s) would still need a good knowledge of mechanical engineering, geometry, woodshop techniques, drafting/design (which was my specialty btw) along with the 'how to' /inventive logical skill, what is the incentive? who would hold the patent for this if there is one?
Leroy D Brown Harry Watt's square drill (google US1241176 ) is very different, and has no off-center rotations. It has a stationary square housing, with sharp corners that chisel the wood away from the corners, and a central bore/auger bit which removes the middle and all the chippings. You can get them at Lee Valley tools. It requires a drill press (because of the force needed to drive the chisels) and there's a special clamp to hold the housing still as the drill rotates.
I'd agree that's true, but it's not evidenced by Watt's patent, which doesn't use a triangle or similar means. I'd be interested to see a patent that does if you know of one.
no that is the method first used to drill square holes using drill presses in steel plates for the ties. the spikes would then go through the square hole-so you are talking 1800-s
At first I thought this was a video about the rotory engine
VERY cool. I gave a report in high school on the function of a Wankel rotary engine (WAY before Mazda used one!) And that had a rounded triangle moving in an oval combustion chamber. Nifty geometry.
OK animation. Now, does the tool actually exists?
No because it does not make a true square hole, the curved edges make it not perfect for what most people want. But im sure you could find one some where on the internet
TheBridgeProduction1 well it makes squares all right (just use a saw or a dented knife to cut out the small round edges), still much better than nothing at all.
Yes, it does. It was featured on QI and is called a Reuleaux Triangle. The corners are not as rounded as the video shows IRL.
MY APEX SEALS, BRO!
*this video aged like a fine wine*
The vibrations produced by that arrangement of metal things going into wooden things would surely render it massively inaccurate, if not unusable.
Now, my life is complete. lol
reminds me of a rotary
For anyone wondering the shape is Reuleaux Triangle and based on constant curve width. "In principle", it should as shown. (Maybe with a little difference in speed)
This is a Whitney style square hole cutter, used them for 20+ years at Pattin Manufacturing, 1980s, making does for 1-1/8" square heading does for mine bolts. Procedure; Drill 1-1/8" round hole in die blank, floating chuck and 3 flute square drill, with 1-1/8 hardened template to guide square drill to through die. Radius in corners larger then bolt spec. Shave corners with 1.125" square on manual broach press. Plug at back of die controls head height, as well as stencils bolt length", material dia./strength, manufacturer code. Heattreated A2 and h13 in our own electric oven. All of my machinist have passed, but the new kid, shop foreman learned from the old guys, how do squares and hex shaped dies, before learning EDM and machining center tooling.
nice cartoon......lets actually see something for real
yeah, cartoons are for kids
i can only guess that russians do not know what a square is.
it is square ish but not a square.
+Que Sero Okay, that was funny!
+Que Sero
appreciate for the designing efforts. and tool
fun fact: Apple Inc. actually invented that shape.
+Que Sero its impossible do drill a perfectly square hole, there will always be a round corner, you can just make the corner's radius smaller with more refining.
+julien gagnon that is a good point, i wish i had made that point first.
oh wait, i did !
:)
have a great day.
You can't do that! The future will be changed! You've created a time paradox!
that by the way is how railroad tie brackets were first made on big drill presses. those are the square holes the spike went through.
That's still not a square. If someone can develop a rotating tool that will cut an actual square with 90 degree corners and not rounded ones then I will be amazed.
Actually it's not possible to create any material square without any roundings at the corners. There will always be a curve at the edges, no matter what tool is used.
Except if you use a keyway broach because those don't rotate, they have a series of teeth increasing in height that shave off portions of the material as they are pressed in through the collar. Those cut edges so sharp they'll slice right through your flesh.
RustyDockLight
Still going to be a curve at the corners but a very small one so you won't see it with bare eyes.
It will be within tolerance so it's considered to be "square" even if it's a molecule or two off from being absolutely perfect.
Styx Bender Really? Focused ion-beam milling quite literally takes atoms off of a surface, I'm sure it could create a sharp square.
Mamemamuueeckue emiogbi
Математические этюды
Matematicheskije etiudy
It means "mathematical etudes", as in, compositions.
Best way to understand , that was a good way to show it .
It's so strange to see something spin in a circle but cut out a square.
And how is this going to help me?? They want me to order a special drillbit from Russia?? HAHAHAHAHA, not going to happen anyday soon.
can't make it yourself?
SoWeMeetAgain
No, I'm a butterfinger myself, so...
well then I suggest ordering it .... from russia if you find it there :D but I am sure this very, very advanced technology - nay even more - nano giga extra technology, is available in the US as well ;)
That geometry is pretty simple. You could have it made local. It just would cost you a little more.
I plan on making them myself.
*****
If you are a butterfinger maybe you should stay away from power tools. :)
why this is in my suggestion videos
This is precisely why square holes are generally made on a milling machine.
You really can drill a square hole with a power mortiser :p
A hole is always round
spoken like a true amateur
Not my hole ;)
Prove it
Doug Asker 2.bp.blogspot.com/-K_fqEXs6KZk/UGrHP-7XB6I/AAAAAAAAAbw/9VV55EZZs8c/s1600/GraveHole.jpg
G. oAway Lol
Nice try, but a square has 4 CORNERS, not rounded edges, tell me when you don't fail.
Sufficient magnification will make any of your corners look rounded.
Rounded edges???
Try again.
Fdldd haha great!
A square has 4 SIDES not corners, this is a radius edged square. go back to school!
Jeff H.
Wow! this has 4 equal length sides, where is it dictated that a square must have sharp corners? so if i sandpaper the corners on my square coffee table so nobody hurts themself on it does that make it no longer a square table? what shape is it then? BHP bluescope is the largest steel producer in the world and they sell radius edge square tubing...Alcoa is the largest aluminium extrusions in the world and guess what? they sell radius edge square alloy tubing....i know because i use it everyday.....maybe you could enlighten me with your wisdom? what is this shape then? i'll be sure to pass it on to BHP & Alcoa so they can correct there product listings....PS. my suzuki RMZ450 motocross bike has 'according to the manual' a radius edge square tube alloy frame cradle...draw a sharp edge square on a piece of paper with a pencil then look at the corners with a magnify glass & guess what? they be slightly rounded "radius".... Right angle can also have a radius edge...So what is this shape then?
Jeff H.
the issue was not how to cut the hole for tube i use.....i already know that i own milling machines & lathes....still waiting for the name of this shape?
Oh wow
This explained why the camera lens is round but the picture is square
crolling thru the dashboard, I swear I saw a Perry in the thumbnail.
This must be some meaning of "square" with which I was previously unfamiliar.
I have a test in a could of days and instead of studying I'm watching this, i don't even know how I got here and I don't even need to drill any damn square holes
So *that’s* how the Kikoho works
So that's how Tenshinhan does it , i guess you can turn triangles into squares
Its even better than that.
If you look closely at the drill, the shaft has a couple of universal joints in it. That would mean the cutting part wouldn't remain on it's axis. The whole thing would flail around in a most entertaining way! (for one who was watching...)
wtf did youtube recommend me this but im proud it has.
It needs to be pointy like a step drill, a way to center it can be to pre cut a round groove with a cupdrill in the center of where you want the hole to be, the diameter of the round grove will guide the tip of the drill.
Cool. You can call it The Wrist Wrecker
This is how the Tri-Beam works. A triangular beam that leaves a square hole.
Reuleaux tetrahedron is one application of this. The Reuleaux triangle formed by three intersecting circles is the result of this drill. The mechanism is very practical to drill square fits with different depths.
This is highly technical like the Brachistochrone curve and the Tautochrone curve applications. These are mechanical curves for pinions, gears and machinery. In essence we want ways to apply torque on hard reaching spots.
Well, that's certainly a way to drill a rounded-corner hole.
Still waiting on a square hole.
Really love the sound quality of this video