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TFS: Pie Cuts Made EASY
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- čas přidán 14. 12. 2016
- Pie cuts, pie cuts, pie cuts! Fabrication would probably be so much easier if there was an easy way to calculate all the angles, right? Well, it really is easy. In this episode, Justin the Fabricator breaks down two different methods of calculating pie cut assembles in a very easy to follow tutorial.
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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..... 👍
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.
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
Right on. Thanks for watching as always!
Knew you had a video like this! And it was just the refresher I needed to make a duct piece today! 🙏 😊
I love pie. Peach cobbler. Apple. Blueberry. Cherry. Lemon meringue.
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!
I'll see what I can do.
Beautiful garage and great tip
Nice explanation of Geometry!!!
easier to learn when you get cool stuff when youre done!!!👌👏👏👏
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...
Right on. Thanks for watching!
You the Man. Investing time for the People.
Well done! Thanks for sharing the knowledge.
Thanks for watching!
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.
tuloko16 That info about entry and exit pieces is actually in part 1
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
i did cut angle 10 deg, trans angle 20 deg, and 5 deg cur angle and trans angle 10 deg
I'm not sure what better, the welding or the pumping heavy metal riff
Very useful video
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.
Thanks for the vid, subscribed
Very helpful thank you
Cant wait till the next episode!
Thanks for watching!
Doing great work man ! really inspiring and good stuff youre posting,keep it up!
Thanks!
Thanks justin my pie cuts came out great !!
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
massieVtec There will be soon
Very easy way to do it.... u explained it very well thank you sir!!!
Thanks!
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?
I’m looking for the same info
Justin, thanks so much, you are good .
Thank you!
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
good explanation. that will definitely help me in the future.
Right on. Thanks for watching!
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?
thanks !
but how do you put that onto the pipe to cut it? and with what do you cut it?
Wait for the next episode and I'll show you
The Fabrication Series - this was going to be my question as well. Thanks for this vid, looking forward to the next one!
With a miter saw or a band saw with a jig.
Do you by chance have a video or insight on doing a 160 degree angle? Building an exle bend for my exhaust.
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
Take it to a pro you shouldn’t be around tools
What determines the Radius of the finished bend ?
Great video ! 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?
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.
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.
Magic and science just had a baby.
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 ?
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?
300% Customs best way to do this is to draw and to measure the 3 inch radius mark out equally of the size cuts you need then transfer that line to the bottom of radius with your bevel finder
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 explanation Thanks
Great video. Does the same apply for square tubing?
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
I'll get further into that in a future episode.
SO GOOD. Many thanks!
Thanks for watching!
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 ?
Great video and I've been looking for this info. Really appreciate the time you've taken to explain this--easy as 'pie'.
Thanks for watching!
THANK YOU !!!!
Thanks for watching!
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?
Rob Weaver Part 2 [still] hasn't been made. It's on my list. Lobster cuts are another term for our cuts. They have many names in many parts of the world.
looking forward to #2 . I'm interested in this technique for motorcycle exhaust pipes. A pipe that gradually swells and then reduces in diameter, are the pie wedges made up of gradually larger pipe diameters that are welded together? Great videos, you're a pro!
great contenent. subscribed
Thanks!
what's the best way to cut the pie cuts?
I prefer a bandsaw.
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.
That is coming up in a future episode.
thanks. by the way, great content. as a sheet metal worker it's always good to know how to work with different types of metal work. keep it up
Good video...
Thanks for watching!
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
EDIT ^Video^
Great. I've glad people have griefed you into making this, ahah
I'm convinced it will never stop no matter how many pie cuts I make haha, but I don't mind. Thanks for watching!
i like it!!
Thanks!
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)
By mentioning a cut angle and a transition angle, it's implying that he doesn't - for the exact reason you ended up pointing out.
The CUT angle would apply to the end pieces, which only need to be CUT once. The TRANSITION pieces would be the remaining pie cuts, which would be stuffed into the TRANSITION from each end pieces.
if you are doing a small angle change like the 4.5* cut you wont notice a major difference and it could be butt welded with little trouble. but the higher angle your cut the more oval the pipe gets. You will want to start using the straight cut pipe as end pieces (or half a pie cut on each end).
I mentioned in the first episode about the inlet and outlet transition pieces. They are needed for angled pieces of greater angles because the actual shape of the cut angle is elliptical or oval. The heavier the angle, the more likely you'll need and inlet/outlet angle.
My chop saw has trouble cutting stainless steel tube. Any recommendations on the blade to use ?
What kind of trouble?
I was using my Mitre saw that has one of them carbide cut wood / metal blades. I think its not up to cutting stainless. It just made it really hot and the blade started jumping about. I bought a makita chop saw with an abrasive blade. Seems better but quite a bit of cleanup needed.
Short of a laser IMHO a band saw is the only way to cut tubing for stuff like this. I dicked around with a chop saw for years and picked up a cheap harbor freight 4x6 band saw at a garage sale. It's far from the best but my Milwaukee chop saw gathers dust now. Done made up my mind when it goes out I'm getting a good one but it seems like the thing won't die.
question. after welding don't the angles change? expansion of welds and materials?
Not by any extreme amount that would cause worry. You might get 88 or 89 degrees when you wanted 90 but thats also up to how you weld it as well.
The Fabrication Series thanks. i haven't tried pie cuts before, but your vid is giving me some knowledge that is useful when i try my first pie cut
How do you go about marking and cutting these angles?
Next video.
Yes, next video.
what calculating how tight the angle is? tight 90° for example as opposed a sweeping 90. my Englishes no goods
The angles won't change - just the length of the pieces.
Frank P The length of the top part of the pie, will give you the angle. There is a formula to calculate it.
+Meir Schwartz thanks for the qwik replys guys
look at my other comment with the links. super useful tools that makes it so easy.
OOOOh when when
Soon
But what about the filling
very useful content dude... but u need a higher resolution camera...
Sheih Buhari It's shot in 1080.
Click the little gear icon in the lower right of the video and change the quality.
Sheih Buhari Agreed, great content but some if the footage ends up a bit grainy. Although it may have been shot in 1080 the actual resolution can vary based on many factors but I think the lighting is playing a pretty big part in the quality of the video.
"Math"..... NICE!
One piece of 3,14
Ha!
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?
Colyn Maurer I'll show that in the next pie cut episode. I briefly described in in the first vid where I drew the parts in the software which can be done with paper and pen.
After looking and looking I think I figured out the math involved. Thank you for the badass videos.
take the clr and divide it by the number of pieces that will make your bend. that number is going to be the width of your pieces at the center line you put on the pipe NOT AT THE ENDS.
I'm more confused now
Did CZcams just posted my comment 4 times!?!?!? ...it won't allow me to delete the extras :P
Huh, what?
I wish they taught this in death metal class...
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
Go to TheFabricationSeries.com and click the contact button. I'm a little behind on emails, but I'm sure I'll get back to you.
Way over talking a simple concept.
ZakarooNetwork Not everyone sees it the same. People learn in different ways viewed as simple or complicated. Be mindful of that.
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 CZcams just posted my comment 4 times!?!?!? ...it won't allow me to delete the extras :P