I love it. Practical math. One edit. At 10:43 where you say you need to add a cut, going from 10 to 11. That's not true. You still want to remove 1.25" = 10 x 0.125 (blade width) of material. But those 10 cuts will divide the length of tube into 11 sections, so to determine the spacing of the 10 cuts you divide the length of the tube by 11. Now that I got that sorted out it's time to fire up the chop saw and welder and bend some tube. Thanks.

This is a great explanation. I've used kerfing in woodwork many times but honestly never thought to calculate it out as it's so easy to manipulate the timber. Doing this for metal work makes perfect sense.

Thankyou for that info sir.. This is exactly what I am looking for..watching from Philippines, Davao City

You are hilarious. Thanks hanks for making this fun.

This is SWEET! Thanks for the video!

Commentary is awesome! They should use your videos in school. You make it fun to watch and learn.

This is incredibly useful to me. Thanks for sharing your knowledge.

Just seeing how you cut slots in the tubing was enough information for me thanks a bunch

Brilliant...way to think outside the box.

This was brilliant! Thank you!

Awesome video! I originally saw your welder review video and your fence blew me away. A few days later, now really interested in learning that bending technique, I found your video on it. Awesome & thank you!

That was cool as hell, thanks

It's called kerfing . I use this method when make curved fronts on decks, or a window box. When I use this in fabricating, I always tack the middle first to hold it. Great video.

He i liked your video and explanation on bending and welding straight metal tubing to make arches! This will come in handy! Greetings, Jeff

My wife and I are doing a school bus conversion with a roof raise. I have been looking for a bending tool to create a curve at the front and rear of the roof to give the bus a more retro look. Essentially an old Crown bus is what we are working towards. This technique looks like it will solve our problem of bending the tubing without spending a grand to buy a bender capable of doing what we need. Thanks for this video and the excellent explanation of what is needed to make the cuts to get the bend we want.

I can't believe you make me wach all the video I love it,

Brother man, excellent job. Im currently working on my gate and i am going the same route with the bend on top. Thanks for the video

Excellent use of practical math. That being said, by the time I was done actually doing the math, I’d be done with the project through trial & error...or I’d just buy a bender instead of kerfing.

Geometry! Who said you don’t use what you learned in high school as an adult!! Thanks for sharing bro

Great video dude, Love seeing practical applications of simple math!

nice video....I need to make some metal archs and rather than bending this is a good solution. math was well explained. thanks!

Thank you for this, the maths was super easy... great video, I never would have figured this out myself. You’re a true gent! Edit: just did this with 4mm walled 100mm box section with a really tight curve that the local fabricators said would kink in a roller. It took 52 cuts but It worked out perfectly! It moved like a slinky!

Fascinating

Using imperial measurements as you do: Cut it twice as many times (21), then put a 1/16" shim in before you tack it up. Gives a smoother bend, pull the shim out before the final welds and you'll also get more penetration.

I had an “awww okay” moment than you lost me where the cutting situation starts

Great explanation. Knew there had to be an algorithm for this.

Your video is simple Thank you

Great job

Ok but where did you get the 399” and 403” from? I have an 8” gap at 115° I need to bend a tube over and across that 115°. How do I find the inner and outer circumferences I need to get that measurement of the tubing to cut before I start making cuts?

not what I need for my project, but good idea for stuff like this, will put it in a playlist for future projects.

Awesome! I am gonna use this to cut my curved frame tubing for my new teardrop trailer. It is a french curve but once I figured out that all I had to do is change the distance between the cuts for the thing to work out, it was pretty easy. I made a test cut out of wood to see if I goofed, but I got it first time! I will do some minor tweaks though - it is nice to make test pieces. I am going to cut the metal next week when it gets here.

I love it thank for the information

That's great. I'm pretty certain that you can do the same thing on round tube (only the welding is slightly more difficult), and I actually found this video because I am going to bend some round tube for an exhaust pipe later this week.

Great instructions. Thanks.

and how about a 28 incnh outside cicle out of 2x2 tubbing how far apart would i cut the slots with my shop saw

ok how about a 76 inch half circle out of 2x2 square tubbing how much far apart would i cut the tubbing with a chop saw to bend a half cirle 76 inches across . it would be 76inches half circle .how far apart would i cut the slots.

If i have a piece of square steel that is 50 inch and the door is 35 inch the witdh of my blade is 1/8 is it possible to calculate 50-35=15 inch so 1/8*60 cuts 15 inch to get the proper length will the hight be the same 50-35=15 inch tall at the peak?

Great job brother, weld on 😎

You’re fun to watch👍🏽👍🏽👍🏽

very very nice 👍

lol.... as you can tell I found your video.... Would you be using a garage door opener set up to open an close you gate. AND great video picked up a lot of usable intel .!.!.!.!

This was a great video, I was worried that the arch pin bottom would have angles, but it was worked perfectly.

how to find the length of the beam and how many sections you cut for example at the 3 m gate

its realy good thechnique.

It’s like drywall cuts. Cut then weld up really, 👍🏽

Brilliant . I enjoy common sense solutions to what seems complex. We tend to over think things

Nice work

Nice. It's obviously a lot of welding, but who doesn't need welding practice? :) Thank you for sharing this, it does give me another option for an upcoming project.

Love your humor! The math is easier to explain if you just say that the upper and bottom lengths of the arch need to be 35.9/360 of the circle so just multiply by that fraction. Explaining it this way removes the need for cross multiplying which loses a lot of people.

awesome thanks for the info. i used autocad to cheat a little but end result was awesome thanks and great video

Excelente

Great and very informative video. Thank you. I had figured that I was going to have to make the cuts and weld them up but didn’t know how far apart to make them. Do yo have to relieve the cuts? Take out a little wedge to make room for the bend? And did you use the HarborFreight welder for the job?

Don't worry about us not from the US; we know how to convert. ;) Just friendly advice: if you want more subscribers, it helps if you use both imperial and metric. Bear in mind a very large proportion of the KZfaq audience does not use imperial. That said, in this case it doesn't matter much since the math principle is what matters, and I did learn from your video. Thank you.

So i can use the same length of cuts for a 12 foot gate? Every 11.4 inches ?

Dankie

I’ve been doing this job for more than 20 years and always do by eyes. For 3 mitre gate , I cut 3.5 m metal , mark the middle 1.75 m and again start marking every 20cm from middle to left and the same to the right , than bend and tak them than match it with my fram and cut the extra from both side But today I learn some math which it will help me on day Thanks 🙏 for sharing I also would like to say u make a nice looking gate with wood covered, why don’t u ad a metal horizontally half way up in middle of the gate to make it stronger and wouldn’t have short to cover the top Thanks for uploading

What brand is youre metal Saw and welding machine?

thanks

Your "wysiwyg" didn't work out. On the computer, the wood was cut at the same radius as the tubing.

Wow, this video is great. I was wandering is it possible to bend pipe 6x2 cm to 180 degrees this way :-/

Nice

this video is so fancy....is this the same guy from Regular Car Reviews?

I’d love to know a lot more about the electric gate …did you fab it or buy one?

Thanks helped so much

How wide is this gate?

Excellent video. So, in other words you have to make the deficit to bring both measurements the same. At first it sounded confusing until you explained it. I'm doing more roofing work so needing to learn trigonometry and maths equations. I'm running 2 d cad which is quite good. Great video.

That's really a nice gate. Bravo. Video well done too. Great explanation on simple geometry as well. The jokes.. well I'm not going to criticise. I'm not on Improve either. :)

After Einstein and Bruce Wayne, you're next in terms of intellect and practical application of Geometry. Having been told by 5 metal fabricators that bending of Square tube needs a hydraulic. Press, die, gears etc., Your neat trick helped me get a gentle bend representative of a flower stem. Thanks for posting your video without which it would not have been possible!!! Will send you the pics when the structure is complete :)

Could you help me please My circle out size is 60 inches My tube size is 1 Inch What's the width of cutting

Saludos desde mi casa

Doesn't really matter whether you're using imperial or metric here… if you just treat it as centimeters, it will work just the same, it'll just be much smaller.

genius!

I saved money now

Instead of doing all those cuts and weld couldn't you just use a rosebud torch. By heating up the top of the square tubing. Calculating from the total length dividing it by four that should give you the four spots to heat up. When the steal starts to get red hot. Pour some water over it and you will see the tube starting to bend. After hearing up the four spots or more you will get an arch like curve. May take some practice.

Very Nice Awsm

It would help me if I can figure it out

24ft gate how far apart do i cut

Kerfing basically use the thinnest cuting disk and slice the hell out of one side you want to bend then weld it back up

Excellent example - Nobody else on the net explains this as well as you do. Think I'm kidding - Look for it. Nada - THANKS!

You better make the bender machine bro...

Kool

when does the bending start ,,,, just a row of straight lines as far as i can see.

yup..........just ordered a bender....lol

Minit 5:00 cut your neils. Great work!

Could you please say "surf's up dude"

Nice…….you have a table and your cutting on the ground?

once it's welded I think it is just as or stronger than straight

I missed how the 403 got in the start for the math.

Nice but I feel does cuts is adding a lot of extra work having to weld it and then grind it flush

Did you allow for the pull when you weld that will change the shape over all. Also just invest in some rollers no cutting or welding

yo mathematician or a welder? i learned from you but not on my college days..lol

For 10:44 i learned a lot than a semister..😳😳

OK . Thats one way to do it.

Grinding to get a factory finish afterwards isnt worth the hassle. In some cases you'll need to apply auto body filler. It's easier to have it rolled. Unless your living in some rural area in India. Just saying

the pipe is 60 x 40 on the side of 60 make the section

Hi

Use a Pumpkin and then you have Pumpkin Pi

I'm sorry you lost me at computer I am Amish So i don't have a computer. Jk cool video bro

Just funny.. Why not use the proper and professional bender for fast working to produce more in less time.

I know how to bend with put cut and without bender