This was exactly what I was wondering about this morning.....I've written it down and saved the video! Thank you!!

Im about to make a silver egg, and this formula was just what I have been searching for for hours, thank you Andrew, absolute champ!!!

Sound was perfect. Thank you. Clear, crisp, no wasted time.

You are an awesome teacher I did not know you could even bend metal like that manually. I will not use this new skill you've helped me to gain to make jewelry. Instead I will use it to fabricate a universal joint. For that I will have to make two half sphere domes, one will have a hole in the center. In between them I will introduce an appropriately sized (will use your formula) steel ball welded to a small rod that will protrude through the hole in the half dome that will have it, and finally I'm planning to weld together the edges of both half spheres with the steel ball tightly tucked inside. With a little more welding to other parts and a little more thinkering I´m hoping to make a type of hinge I need for the food trailers we make here in Colombia. Thanks again for your time an effort.

Thank you Andrew!

I have been looking for this formula FOREVER! Thank you!!!

GREAT TUTORIAL! Hammering is music to my ears😄

Best dome making video on the KZfaqs. Thanks Andrew.

another informative video. love your tutorials!

Very well explained. Thank you!

Sound was good, thanks!

Thanks!

I want to thank you for your videos, I've found a new hobby.

I’ll have to view this tutorial a few times, just to absorb the calculation part, it I love learning how to correctly use my doming tool.

Thank you!

Great video ! I needed this EXACT info today

Being next to complete zero in maths, I highly appreciate the formula you give, as well as all the techniques shown and explained here. Thank you, Sir

The best video about dapping punch👍👍👍 thank you!!!

Super Tutorial thank you

merci Andrew , have learned a lot...

Thank you ☺

Gratitude ♥️

So useful. Thank you, couldn't find the equation anywhere to do this. Much appreciated.

Thanks so much I am absolutely made up since I found your channel. ..now I can get rid of all the guesswork lol!

A good approximation for the formula you use to figure out what size diameter you need is to take the diameter of the original, subtract thickness, and then multiply by the square root of 2, about 1.4. So take the modified diameter, then just multiply by 1.4 and it gives a very close answer. It's within .01 millimeters of accuracy, and very simple.

Gracias

Within .01 millimeters if you use many digits of the square root of 2. If you just use 1.4 it's probably accurate to around 0.3 milimeters. 1.4 is nice because 1.4 = 9/5. Dividing by five is just multiplying by 2 and then moving the decimal over one place. So you can do it in your head pretty quickly with that method. Just double, move the decimal over one place to the left, then multiply by 9. Quick estimate you can do in your head.

Last comment. I made a mistake. 1.4 = 7/5, not 9/5. 9/5 gets alot of action in my head because it's used to convert degrees Celsius to Fahrenheit. Other than that, I was curious to see the range of accuracy for that calculation I mentioned previously, and I graphed your function with the one I came up with, and they are nearly identical from at least -10^100 all the way up to 10^100. Weird how 9/20 times pi is really close to the square root of 2. Practically overlapping graphs for diameters much bigger than the number of atoms in our universe.

At 7:30 or so I was going to ask, don't you need to anneal that at some point so it doesn't split? And then you start talking about work hardening at 7:46! Lol! I just learned how to use my dapping block! Thanks Andrew. That is one hell of a set you have there. So you make jewelry and lift weights at the same time!

Hello Andrew. Thank you for another very informative video and for again sharing your wealth of knowledge and expertise. Please can you advise me whether the dome can be elongated as I would love to attempt making an acorn. Best wishes and thanks again to you and Louise. Julie . Julie.

Thank you so much Andrew that was very helpful. Do you have an idea of how I can create a dome for an oval shape stone . Tools etc

Great to have these formulas. I fancy making some balls spheres, so Id better buy a set. Thanks Andrew, really useful.

I am learning so much from your tutorials, thank you. My question is: I have a disc cutter that is measured in inches. The dapper sets come in millemeters. If I convert my final disc size from your formula to inches, will it be close to the correct size?

It would be interesting if you made two of them and how you would solder them into a ball.

sound was fine!

Very informative video, thanks so much. Question? How do I remove a disk that is stuck in the doming block? Thanks in advance

Hi Andrew, i'm from germany und i'm looking your fantastic videos very often. Thank you for your great work :-). I don't know if you can help me about the technic to put a little 585 gold pallet into a 925er silverring. At the end it schould be one polished silver surface with a little gold point in it. Have you any idears how i could do this? Would be great... all the best Wolli

I just picked up an inexpensive dapping/ doming set from our discount tool store here, and I’m wondering if the blocks are standardized or if some have deeper wells than other? Mine seem quite shallow- that said, I think I can still get a half sphere if I move the piece around in the well.

dear sir you are professional , i have one question how do you find the center of the dome that you made

Thankyou sir for making this video Please make a video of making a ball with these domes Inserting each other sir

Back again. I’m making copper beads and having trouble making them perfectly round. Some come out oval. This is practice, however I admire copper and am making a necklace for myself. Some beads are finished. Put the drill through my finger making one of the holes. Fortunately it missed my fingernail."...........so I’ll work at them more as you are doing, around the edges and so on.

Andrew, is there somewhere I can find the formula written down so I can write it in my book?

What type of hammer are you using to make the dome?

Just curious how you came up with the factor of 0.9*pi/2. I did some simple geometry and came up with a factor of sqrt(2) which is 1.414. Amazingly, this is almost identical to the factor you used. I find with modern calculators using sqrt(2) is easier to use.

Is there a way to make a full ball, rather than a flattened ball, with the doing block? Does this measurement only calculate for a flattened dome?

Who makes the circle cutter you're using Andrew?

The 0.9 measurement. Could you explain please where this fixed number comes from? Is it the difference between the dapping tool and the dapping block?

Andrew, you used a ball peen hammer and a rawhide hammer interchangeably. Is one hammer better than another?

😳 I thought I clicked on a doming video, instead we are baking during a math tutorial. Never did reveal what flavor pie. 😳

"I'm going to tap that out", proceeds to belt seven shades of shit out of it. Well done sir, that's what a 'tap' should look like!

I just adore At The Bench, and I am just about to plan on financially including an online training program. I feel hesitant to join because I have asked simple questions (which are encouraged on this KZfaq channel) and seldom if ever get an answer. Is this how the training program will be too? He seems so professional, but...... I am considering a serious investment, and I wonder why are there so rarely responses (even though asked for and feedback requested?)?

I can't believe you use your rawhide hammer to punch out disks. It's not heavy enough for that. Use a brass one.

Thank you!