How to make a Cone from Flat stock

[@shaddec55]

Thank you so much for including the template calculator in your video! No other videos I've found did that. And I discovered something really cool about that calculator: It doesn't care if you input mm or inches. It gives the correct measurements regardless. Check this out-- Using my mm ruler, I measured my inch values against it (with my inches ruler), rounding up or down to the nearest 5mm for simplicity). The calculator will give you measurements to the 100ths of whatever scale you're using-- ignore those, unless they are close to .25, .50 or .75 (i.e. 1/4, 1/2 or 3/4 in INCHES), needless in the mm scale). I ran the calculator with both mm and inches in round numbers. I wanted a cone 10" tall with a diameter of 3" at the top and a diameter of 5" at the base. Here's what I got: Inches Input A: 3 Input B: 5 Input C: 10 Output Calculation Arc Angle: 35.82 degrees Radius R1: 15.07 in. > note the difference between arc R1 and Radius R2: 25.12 in. > arc R2 is roughly 10 (inches) Millimeters Input A: 75 Input B: 125 Input C: 255 Output Calculation Arc Angle: 35.13 degrees Radius R1: 384.33 mm (~ 15 1/8") > note the difference between Radius R2: 640.56 mm (~ 25 1/8") > R1 and R2: 10" Damn close! So, no need to convert inches to mm on this calculator. It works either way! I hope this helps anyone who might want to us this.

[@vikingcove]

Thanks -- both for your video & for the link to Craig Russell's online calculator. I simply entered my "inch" measurements (e.g. 4.72", 5.7", 3.45"), so the results were in inches. No need to convert to & from millimeters. I used it to make a bubble foil liner for my hummingbird feeder heater lamp bucket. [Edit: Reading comments, I see many others also skipped the conversion. That doesn't detract from your video. Thank you again.]

[@AlexanderDyer]

One benefit about posting videos is I learn as much as I share. 😎👍

[@murrayc9615]

THANKS for the link, Alex! I work for an engineering firm as a CAD Draftsman, and I was trying to find a source on how to calculate a funnel so that I could create a detail drawing of it.

[@coyotech55]

Very helpful! I'm making transitions out of flashing between the outlets of my gutter downspouts and PVC pipes. I figured it out pretty close using paper models, but duh...I didn't think of making an arc instead of straight lines. I had the ends curved down with straight lines, where the arc does much better. Embarrassing but nice when an obvious solution hits you in the face. Unfortunately, the cone calculator isn't available after all this time, but your example was still very helpful.

[@63DANNYLEE]

Sure glad I served a 4 year apprenticeship as a sheet metal tin smith and worked in the field for 34 years. This method works but understanding the geometry and knowing how to do the layout makes life so much easier. His method works but it is slow.

[@ProfDrFleisch]

You just saved me a lot of time figuring that out on my own! big thanks to you and to Craig Russel for the calculator!

[@AlexanderDyer]

We stand on the shoulders of giants and KZbin lets us help others up onto the giant that we happen to be on. I wish I could have said that better, thanks for the nice comment.

[@Gottahav63]

Thank you very much man. That’s awesome. I made mine in five minutes out of cardboard. I was gonna work like a charm. You are a man. Hope you’re still doing this.

[@AlexanderDyer]

Glad I could help

[@fadoodle]

I have zero experience working with sheet metal, but for some reason I awoke this morning wondering how to form a cone out of thin aluminum. Thanks to you, now I know! Question: Is the overlap needed for rivets (or adhesive, I guess) already figured into the aforementioned formula?

[@AlexanderDyer]

The overlap is not figured in. The minor difference was not enough to worry about on my project but yours might be different.

[@fadoodle]

Alexander Dyer Thank you for your prompt and thorough reply.

[@CRLuggy7]

Haha on an architectural project and your video and calculator comes just right! Thanks a lot!

[@AlexanderDyer]

Great to hear!

[@jamesdrury9906]

Hi, could you go into more detail on the marking out just dont seem to ge that part. Thanks

[@ashleyrosevear4319]

Great to see you using a Hitachi drill, I use a Hitachi (since changed to Hikoki) rattler because it is a lighter unit. You might like to get some offset snips, much easier to cut through flat sheet than aviation snips. Get left and right rather that straight...

[@gregdobson6452]

It would be great if you could do another video, and this time Mark the cuts out in felt tip pen and also explain what you are doing as you go along. You seem to be marking your radius's from the edge of the sheet, whereas the calculations appear to be measured from the pivot point of the Arc Angle. This is very confusing.

[@AlexanderDyer]

I just used the edge as one side of the arc to save on cuts. I have been contemplating another video on this subject. Thanks

[@Mojomo777]

Thank you for sharing .... I need to make CAMERA hood, the method shown here help me to make one very quick. Thanks again.

[@AlexanderDyer]

That is cool.

[@mhern57]

I've been working with sheet metal for many years but lack in pattern development. I do appreciate your instruction however you go from doing a good job explaining to a high-speed video of I don't know what the heck you're doing! After watching it several times I was eventually able to figure it out. It would have been a good idea to explain your layout and arc points at normal speed then high speed if you felt that was necessary. Actually I would have enjoyed watching the entire process at regular speed. It did save my bacon at work so thank you.

[@AlexanderDyer]

I am glad you were able to glean the information you were looking for despite my less than desirable video. So can I look forward to your much better video in the near future? I kid. I do try to balance instruction with entertainment and so the trade off is you might have to watch multiple times but I do try to include all steps. Admittedly, my videography has improved with time and experience. Thanks for your critique, it helps me to be better.

[@markwheeler202]

Run the video at reduced speed. Click the Settings gear icon and choose 0.25, 0.50, or 0.75 of "Normal" speed.

[@Waterboy65]

Alex I liked the video just was wondering how to add in a bend at the bottom (small end) of the cone. The bottom would have a inch or two lip. I might even add a wire on the top rim. Just want to figure that bottom part in the design factor.

[@amareshyadav5045]

Sir frustum cone ka weight nikalane ka formula kya hota h

[@licook7023]

excuse my ignorance but how do you know what size flat sheet do you need to begin with and how long of an arc do you need to draw for the base of the cone

[@Blakgun]

The cone calculator at that link is no longer working. Is there an alternate link?

[@AlexanderDyer]

Sorry to hear that. I am not affiliated. I'll bet there are more out there that you could find. Good Luck.

[@penniseaman9579]

Worked great! Used it to make a round bird house roof.

[@plank1840]

Was trying to think how to make windsock/cone ..big THANKS ..📣📐🚩

[@AlexanderDyer]

Cool. Hey! That gives me an idea! Thanks. 😃

[@AliBenjellounM]

we dont have metal sheets like this one ,what you call this white one?

[@AliBenjellounM]

What are crafts used in?

[@AlexanderDyer]

Trim coil. This is what is used to make trim for house siding. Aluminum coil stock at the home supply store. amzn.to/40s1SW1

[@NoferTrunions]

I'm trying to figure out how to make a cone with a nice point to serve as a roofing finial.

[@THULASIKUMAR1408]

This type of metal sheets are available at online

[@lmfarms4611]

Thank you, just bought some ufo barn lights they are flat on top, needed to put a cone on them to keep the birds from landing on them and making a mess on top of them.

[@mathstricks5157]

How to put marking of 5 ltr, 10 ltr, 15 ltr in 20 ltr frustrum shape bucket? Is there any formula? If there pls teach me Sir.

[@THOMASTHESAILOR]

Nice Job, I need to make a cone from fiberglass.. I know Fiberglass doesn't stick to Aluminum.. I think i can just cover an aluminum cone with fiberglass, and then remove the Aluminum.. Thank You. !

[@foobash1]

Do you have a link for the tool you used to make angle?

[@AlexanderDyer]

I used a miter gauge from my table saw but this would work if you don't have a table saw. amzn.to/3jS4SqR

[@jeffrobertson1491]

I intend to use this method to form a cone from 1/4" hardware cloth. That's a little more rigid than what you were using. Do you know of any easy way to help the hardware cloth take the initial shape after it is cut?

[@AlexanderDyer]

I guess I would just get some leather gloves and start slowly and methodically working it into shape against a flat surface.

[@hippolytesando4120]

Thanks a lot for this full informations. Please Can we have french version of that. Thanks you!

[@kailaskumarl5510]

can anybody give the development of a transition piece from rectanguilar(4567x4328) to circular (4980dia) having a 2500 length.

[@willbell1128]

Only if you do it inches,,

[@abdullaalhamid5621]

great thing,,,, i made my industry equipment based on this. before that i have no idea , how to do this work ... again great content ,,, and useful

[@bogdanzivkovic157]

can you bend 1mm steel?

[@batangkankaloo1055]

11 inches tall 11 inches the bottom and how to get the angle and whT measuremnt? 16 or 4" the round top how many inches if i do the measuremnt in flat? Thanks for the answer i need to this exctly on my aprenticeship

[@utoopuser]

Thanks for posting. So I used the calculator with length A=10, B=20, and C=11.( from and existing cone).The answers were: arc angle= 148.79 degrees, Radius R1=12.08, and radius R2=24.17. On my flat material I can draw concentric circles of 12.08 and 24.17. No problem there. Question: Is 148.97 degrees the size of the "piece of pie" I discard?

[@AlexanderDyer]

no, that should be the part you want

[@utoopuser]

@@AlexanderDyer Thanks so much for your prompt reply. I am in the process of reconstructing an antique lampshade left to me by my dear aunt.

[@CowboyGirl007]

I want to make a 10" tall x 4" bottom by 6" top cone for a lamp shade. This looks like what I want but I'm confused with the cutting you did. You made two half circles with the board and screws....are those measurements radius 1 and radius 2? With the arc angle being the tip screw..but then you used a square to draw a line and cut on the line instead of cutting the angles you drew. I'm confused. What was the line? It's half the circles?

[@AlexanderDyer]

That is a speed square which has angles on it from 0 to 90 and so what you see is me using it like a protractor marking the angle indicated by the calculator and not 90 degrees. The board with screws is a compass to mark as you said the two radii. Your exact radii and angle will be indicated by the calculator.

[@CowboyGirl007]

Alexander Dyer thanks. So you put the speed square on the center point where you drew the sphere's, correct?

[@AlexanderDyer]

Yes

[@CowboyGirl007]

Alexander Dyer thanks. I think I have it now. Thanks for vid

[@jakepearson2298]

How do I add in the overlap for rivets? Thanks

[@BarroCocido]

Pencil a line parallel to the line he traces at 2:15, the separation of these 2 lines being the overlap you need.

[@danielkline9825]

What is difficult for me in understanding what you did is 1. what did you do with the angle calculation? You used some kind of square, but was it set square or some angle? How did you figure this? 2. I suppose you converted the two mm results from the website back to inches. What is unclear is this: you put three screws through your marking stick, one at pivot, and two more. Did you simply put the screws at the measures that came from the website? Thanks for your help on this

[@AlexanderDyer]

That square is what I call a speed square, they are commonly used for cutting angles on rafters and they have angles marked in degrees on them. You could use a protractor just as easily. The angle is dependent upon the figures you put into the calculator and then the calculator will indicate what angle you need. I have since learned that conversions are unnecessary, see earlier comments.Yes the screws are at the distances indicated by the calculator and used to scribe marks into the metal.

[@danielkline9825]

Thank you Alexander!!!

[@CowboyGirl007]

Alexander Dyer which dims/ calculations did u use with the square?

[@marcrigor6423]

Mine has angles marked down to 2.5 degrees and the rest is guesswork. Works ok for air duct funnels when taping them allows for a lot of forgiveness, but this method wouldn't be enough for high precision unless your tools were more precise than the typical ones. I'll have to guess and cut the excess later.

[@cosmosindustrial1563]

This calculator does not account for the overlap where the rivets are going in. I'm not sure how you got it to be the right dimensions with overlapping the edges.

[@AlexanderDyer]

Cosmos Industrial For my purposes that amount of accuracy was not required. If it is however just extend the arc beyond the angle an equal distance to that which will be overlapped

[@lloydguerrero4505]

Thank you. I've been looking for something like this

[@spokeman]

I don't understand the calculator dimensions. It tells you the dimension of the height (from front the back as facing it) but not the width (left to right). It tells you the height of the stock you need but not the width.

[@AlexanderDyer]

Take a deep breath. Think about the dimensions that the calculator give you. Relax. Watch the video again and this time just focus on what I am measuring and I think you will see how to apply the dimensions.

hi. what is the sheet thickness?

[@AlexanderDyer]

I used trim coil stock like this amzn.to/3zr1SsX .018"

@@AlexanderDyer tnx

[@LimitsOfPower]

What material did you use for the sheet and how thick is it?

[@AlexanderDyer]

Aluminum Trim Coil from the home store/ lumber yard.

[@LimitsOfPower]

Thanks Alex. i figured it would be aluminum

[@danmauch1]

Why did you need to convert imperial to metric?. In the calculator it really doesn't care. So I just ran the calculator in imperial R1=8.5" R2 16" and the results were R1 11.05 and R2 20.8 which when converted to metric were the same.

[@dgodrummer8110]

clever!

[@abduselamaliyi8146]

how to get carve angle, small radius and large radius

[@aungko1115]

I don't understand how much inches how much longer? But thanks u.

[@AlexanderDyer]

Just use the metric system and it will work.

[@aqcs86]

Just thought I'd mention that when using the calculator the "mm" doesn't mean anything. If you put inches in, you will get inches out.

[@TheMinicSasa]

Suppose like me, you work with mm. And you found plan wich includes particular cone, on the net. That plan asks for measures in inches. You would have to recalculate all plans measurments from inches to mm to get it right. If you type numbers in inches from that plan directly to calculator you would get everything ~25.4 TIMES bigger. If you slip from your mind to divide it by 25.4 you could get very confused. There are many people who have never used inches, and are not acostumed to coversion from one unit to the others effectively. It is other thoing if ou have all measures in inches, and you use inches in you work, and for mms also THEN it would not matter. But if you have to convert, and you are not used to it, it can give you a headache. Especialy if you are not "engineering person". You have to take stand point of "average person".

[@FSCB2013]

TheMinicSasa Yeah but "average people" are stupid, but they can learn simple rules and apply them. The rule here is: if you use a calculator, you do not need to convert units if you are using the standard units for the metric or the imperial system. Thus, what units you put into a calculator are the units you will get out of the calculator.

[@richardalvord1987]

i winced when i saw you using the tin snips (destroys your wrist). why not use a jugsaw and some thick Styrofoam?

[@AlexanderDyer]

I guess I don't agree that using a pair of tin snips for 5 or 10 minutes will destroy my wrists. Actually I believe the opposite; that diversified activity is the secret to a long, rich, and healthy life.

[@ghostle]

you cant use a jigsaw on thin metal. the teeth are too far apart. i have worked sheet metal for over 45 years. and my wrists are not destroyed.

[@pgh1all1]

+ghostle amen! I agree,what the hell is that guy talking about?? A jigsaw on sheet metal ,really. I hope no one followed that idiots advice. I've been doing steel fab for 38 yrs and never heard of that. Snips will strengthen your wrist and forearms but destroy? I think not!!

[@foamer443]

Clearly a weekend warrior not a Tradesman. 32 years construction Electrician and 5 years as a Machine Tool Operator.

[@jimgolden9666]

Great video man!

[@jeffdeluca1153]

Thanks for the link... great video!

[@ThePoluidor]

it's very cool!

[@AlexanderDyer]

+Shellton.San Gracias señor

[@LMTrueWorldCupWinner]

Thank you my friend

[@nlo114]

I'll be trying this out soon with acrylic sheet and a heat-gun. (How did you manage to do the entire video without trying the cone as a hat?)

[@AlexanderDyer]

+nlo114 I thought it best to edit that out. Now I am reconsidering my decision (wink).

[@s.ausafali]

Thanks bro! You kinda like me but i did it😅,

[@AlexanderDyer]

🍀

[@LMTrueWorldCupWinner]

What is the strength of the sheet

[@LMTrueWorldCupWinner]

What is the strength of the sheet in mm

[@AlexanderDyer]

Well it is just aluminum trim coil stock. 0.4826mm

[@jaishetty8586]

Blessed video.

[@thomashilborn570]

This is a fantastic tutorial! Where is the website for the formula? (to save me google time.

[@AlexanderDyer]

It is in the description, boss.

[@mayurbhoir8183]

Thank you its really helpful for me

[@yeetusthefeetus477]

what we do without Google?

[@phillipallan2863]

Thanks for your help

[@sehajkahlon2951]

Thnx.

[@richardkistner5549]

Thank You

[@richardliston6245]

makes it very easy....thanks!

[@AlexanderDyer]

Cool

[@jompacztv1863]

tenks idol

[@christopherhumphrey]

Thank you!

[@nene_loey61]

so good the best

[@hmhelalbdhmhelalbd]

good

[@shekarvamshi9860]

Super nice

[@AlexanderDyer]

Super Thanks.

[@kishorkumardevadoss347]

thanks bro its awsum.....:-) espiciallly that website ........u rocked..,...

[@jakepearson2298]

Does anyone know where I can find the maths behind this?

[@khanfaraz6737]

+Jake Pearson Use following formula R = squareroot(b square/4 + (b*h/b-a)square) r=squareroot(a square/4 + (a*h/b-a)square) b*3.14=R*arc angle U will get arc angle from above equation To find respective chord line joining two end of developed frustum Alpha=Rsquareroot(2(1-cos arcangle) With these equation u can plot directly without measuring angle of cone

[@JunkWorkshop]

Thank you for sharing Bro, you saved my life ahah

[@rikkkardodavid7137]

I know how to make cones out of paper (:

[@AlexanderDyer]

Then you are a natural 😀

[@JohnDavis-yz9nq]

Hell he is drunk.

[@mahboulamahboula4234]

هههههه

[@davidburns1753]

You did not explain the math or where to find it. Drawing lines with a stick is the simple part! Where are the calculations? Waste of time for me ... glad that others got some good from it. I guess I am dumber than the balance of humanity. Ya think?

[@AlexanderDyer]

No, I don't think you are dumb. Actually the source material location is seen in the video and can be found in the video description but I point this out for clarity and in the spirit of education. Here is a link to the website that I used. craig-russell.co.uk/demos/cone_calculator/

[@timdunk7278]

Thank you!

[@AlexanderDyer]

💥