I know this is an old vid but every one of your videos I watch helps me tremendously every time! Just want to say thank you for what you do! You are a master of the trade keep it up! Thanks!!!!

One if not THE best method for pie cuts calculation.......I already watched it once but wasn't in the mood. Came back and BOOM understood at first try..... 👍

Great video Justin knowledge is power. I have a plaque on my shop wall, Thirst for knowledge, it was giving to me by one of my high school shop teachers 35 years ago, it's great to see the Thirst for knowledge is still alive by the comments i have been reading, as always keep up the great work and my favorite saying it's nothing to it but to but do it

The concept is so simple. Thanks very much for sharing. Not something one will figure out on your own too easily. Just one comment on the reverse method and its use, I would say that this method would be very useful when you have to create a non standard angle from the start of the bend to it's end, something like 47.5 degrees for instance. You will need to use this method to calculate your custom cut angle which will naturally be a non standard angle.

Knew you had a video like this! And it was just the refresher I needed to make a duct piece today! 🙏 😊

Best explanation I’ve seen yet. Most of them are confusing as all hell

Please do a video on how to make merge collectors, excellent content!

Nice explanation of Geometry!!! easier to learn when you get cool stuff when youre done!!!👌👏👏👏

I love pie. Peach cobbler. Apple. Blueberry. Cherry. Lemon meringue.

Beautiful garage and great tip

I have recently started following your videos especially the pie cut series and just wanted to say thank-you for a job well done. Keep them coming...

You the Man. Investing time for the People.

Well done! Thanks for sharing the knowledge.

This is a great demonstration of basic math .. I do feel like you forgot to mention 1 factor ... that is the angle length ... if we use 2 4.5 degree angles on the end of a 6” piece you are guna have one hell of a giraffe looking 90... love the channel keep up the good content

Very useful video Thanks!

pie cuts are easy, once you start doing them. the way I learned was with cardboard. take a strip of carboard, the width will be the diameter of the tube you want to mess with. cut the angles and play with the pieces and you will soon get the concept. one thing that wasn't mentioned was the end pieces. at the end of your bend, the next piece will have one side at an angle(whatever angle you did the rest) and the other will be a straight cut. this way you will transition from elongated inner diameter back to a straight pipe. For me what works best is to cut a bunch of pieces at 7.5* and a few with a 7.5 on one end and a straight cut on the other end and keep them around the shop. I think the 7.5* is the best compromise between smooth bends without excessive amount of welding.

I'm not sure what better, the welding or the pumping heavy metal riff

Cant wait till the next episode!

Doing great work man ! really inspiring and good stuff youre posting,keep it up!

Very helpful thank you

Is there a video of how to actually mark out the tubing and how to cut it? I know the formula (thank you!) I just need to know what to use to mark it out and make the cuts. Brilliant videos man 10/10

Curious. What kind of inside radius would you get? And of you wanted a larger or tighter radius how do you find the math on how to manage that?

Thanks for the vid, subscribed

i did cut angle 10 deg, trans angle 20 deg, and 5 deg cur angle and trans angle 10 deg

Thanks justin my pie cuts came out great !!

Very easy way to do it.... u explained it very well thank you sir!!!

Justin, thanks so much, you are good .

Do you by chance have a video or insight on doing a 160 degree angle? Building an exle bend for my exhaust.

Hey man. Do you count the long entry and exit tube of the assembly as 1/2 of a transition angle? As in if a 1’ piece of tube is coming into and exiting a 90 radius, I want to break it up into 5 pieces, do I count the long entry/exit pieces as one transition total?

Magic and science just had a baby.

Great video ! Thanks !...

good explanation. that will definitely help me in the future.

thanks !

Is there a minimum length required for the short side of each pie cut? Like, how far should the vertex of the cut angle be from the tube?

Thanks for this. both methods make sense to me and unless you are pre making pie cuts for the future, I don't really see an advantage to one over the other. One question though, how do you know how to set up when you cut them out of tube to get the bottom section the right size? Thanks again, I find your channel so helpful

Great explanation Thanks

You need to cut your 4.5 and 4.5 to the half way point then cut 0 the rest of the way. If your clever enough you can leave a little tab in the center. Fold the 4.5s together and take the 9 you cut out of the middle and use it to fill the new v gap on the other side. This will fix your volumetric every and not have it lobster backing.

Great video. Does the same apply for square tubing?

Bro after hours of Google and diffrent pie calculaters and autocad . I found this . Thank you for braking it down. One question . When working with the cuts in theory , could I set my chop saw to the say 9 ° do the first cut. Then flip the pipe 180° and do the next 9° cut to make my pie cut . The reason is I don't have a band saw and I'm figuring the chop saw will make a clean cut ?

If you cut at 4.5 degreess vs 9 degrees and your doing a 180 turn would one have a tighter clearance or do they both equal out to the same when they start to bend ?

but how do you put that onto the pipe to cut it? and with what do you cut it?

How to determine the length of top and bottom section of a pie? For example, if you want a three inch radius, the length of top and bottom sections is a certain length, but different for a four inch radius. So what is the best way to determine bend radius via those lengths?

SO GOOD. Many thanks!

I already knew how to calculate the angles that's basic 9th grade geometry that I learned a decade ago but how do you cut them how do you line up your angles it's hard working with round material to make sure that your cuts aren't slightly different angles and I wanted to make sure or find a good way to line everything up

Are you making pie cuts from a straight piece of tube ? Not the best look for a finished product . Reminds me of a water heater vent . Can get donuts and pie cut them for a perfect transition.

Great video and I've been looking for this info. Really appreciate the time you've taken to explain this--easy as 'pie'.

Is it just me or was the reverse angle easier to pick up on? I'm not the best at math by a long shot, but you really lost me on the cut angle x2 = Transition Angle (T.A) then to T.A.+T.A+T.A+T.A+T.A= most common assembly angle. Also for the part where you say "if I had 5 of the 4.5° it would make a 45° angle and 10 would make a 90°¿¿?? I've been watching this video for over an hour now trying to get an %100 complete understanding.

What determines the Radius of the finished bend ?

easier way is to cut pieces on 0/5/10(5/0, 5/10, 5/5,10/10, 10/0) deg and then make puzzle arrange it on free will, do not think about numbers just arrange it

I’ve been searching for a while for a Solution to this same problem and I found something today. Some one made a pie cut tool ( vpgexhaustsystems)

great info, Tx! can't locate pie & lobster cuts part 2 , assuming there is since there's a part #1. Tx again........also, what are lobster cuts?

THANK YOU !!!!

Great. I've glad people have griefed you into making this, ahah

hey. I understand everything when it comes to figuring it out but I don't know how to actually cut the pipe. can you show a video on how to mark it on a pipe and cut it out.

question. after welding don't the angles change? expansion of welds and materials?

My chop saw has trouble cutting stainless steel tube. Any recommendations on the blade to use ?

do you leave a cut angle on the end pieces? I have found in the past to leave the end piece with a straight cut on one side (0 cut angle) and the normal cut angle on the other. (transition angle = cut angle on end pieces)

great contenent. subscribed

i like it!!

How to make pie cuts easy!!! Screenshot shows a dude with a chalkboard with tons of mathematics on it lmao. Not a bad videos tho

Good video...

what's the best way to cut the pie cuts?

How do you go about marking and cutting these angles?

what calculating how tight the angle is? tight 90° for example as opposed a sweeping 90. my Englishes no goods

OOOOh when when

"Math"..... NICE!

very useful content dude... but u need a higher resolution camera...

I'm not understanding how to figure out your clr vs how the dimension of the pie piece effects it. Say 2" and I need a clr of 6" how will I calculate my pie piece length?

But what about the filling

I wish they taught this in death metal class...

One piece of 3,14

Did KZfaq just posted my comment 4 times!?!?!? ...it won't allow me to delete the extras :P

I'm more confused now

Huh, what?

Wtf i wasn't th8nk its easy like that, idont 7nderstand any thing but i think u say angle 10k time

I’m so confused

what's your email I have some in depth questions

Way over talking a simple concept.

The concept is so simple. Thanks very much for sharing. Not something one will figure out on your own too easily. Just one comment on the reverse method and its use, I would say that this method would be very useful when you have to create a non standard angle from the start of the bend to it's end, something like 47.5 degrees for instance. You will need to use this method to calculate your custom cut angle which will naturally be a non standard angle.

Did KZfaq just posted my comment 4 times!?!?!? ...it won't allow me to delete the extras :P