You could use the standard electrical resistor color code for marking your grit sizes. Using stripes allows you to go 1-grit to 100-million grit using only the standard colors. Easily done. Also, leaving an occasional flat spot on spheres is actually useful, since it avoids to buy a holder for the sphere. We ran into this with our kids projects.
@DirtCleanerVideos
Ай бұрын
Thanks. I am always rattling ideas around in my head.
@Araileo
2 ай бұрын
Excellent informative video. Was just what I was looking for. I am in the process of finding my motors, then i will start the cups. Thank you.
@DirtCleanerVideos
2 ай бұрын
Thanks and good luck with the build.
@johncrable3349
2 жыл бұрын
I made some cups using pvc reducers. I filled the center with an epoxy putty - then pressed in a sphere covered with a plastic stretched tight. I found it gave much more area for gluing velcro. Feel free to contact me if there are any questions. Thanks for sharing and have a happy day
@DirtCleanerVideos
2 жыл бұрын
I love that there are many ways to do this. I am currently working on using pvc for some larger size cups.
@nedchandler1446
Жыл бұрын
I did the exact same thing except I used that spray foam insulation inside the cup and velco to make the bevel. That foam sticks to everything so the Velcro is permanent and never comes off.
@williamgolden5500
2 жыл бұрын
Awesome ! Watching this content makes my day!
@DirtCleanerVideos
2 ай бұрын
Glad you are enjoying the videos. I am making spheres as I write this.
@haroldmedalen6757
2 ай бұрын
Great video, thanks for all the valuable information, I have subscribed.
@DirtCleanerVideos
2 ай бұрын
Thanks. Glad you enjoyed it.
@JamokaJoe
10 ай бұрын
Awesome tutorial... thank you for sharing your research!
@DirtCleanerVideos
10 ай бұрын
Happy to help out the sphere makers. And those who just live spheres or mechanical processes.
@gemstoneslapidary682
2 жыл бұрын
Thank you so much, very nice idea with the clamping of the pads to the cup during the glueing process
@DirtCleanerVideos
2 жыл бұрын
Thanks. It creates a more consistent piece and really let’s the glue do it’s job without it getting too thick.
@shaikhabdulrasheed7488
2 жыл бұрын
Wow awesome 👌
@chrislilly1463
3 жыл бұрын
Super cool man. I love stone spheres.
@DirtCleanerVideos
3 жыл бұрын
Thanks mucho!
@yvanvan3729
2 ай бұрын
Great video, thank you very much for taking time to make it and sharing your knowledge ! I wonder, wouldn't it have been better to glue another Velcro on the cup ? Then it should be easier to add or remove the pads with different grit ! Have a wonderful day.
@DirtCleanerVideos
2 ай бұрын
That is certainly one way to do it. I use that method on my larger sized cups (bigger than what you see on the video.) Hope to have a video out on them by end of summer.
@alan67530
Жыл бұрын
Great information you shared
@DirtCleanerVideos
Жыл бұрын
Thank you.
@krodkrod8132
2 ай бұрын
I just use a ball the size i need like a softball or baseball to press the pads down. That way its symmetrical to the round shape your going for. If your angle is off it will still make a ball but it will take longer because some of the pad wont be making contact.
@DirtCleanerVideos
2 ай бұрын
I hear ya. That is a good method too.
@huntingrocks
Жыл бұрын
Im going to have to build my self one of these , I want a sphere maker for some of the minerals I find but no way do I want to pay the price when I have every thing but the pads at home (and it cuts into my rock hunting adventures ) , great video very informative
@DirtCleanerVideos
Жыл бұрын
Thanks, enjoy the build!
@garypomreinke5694
Жыл бұрын
Do you use a final leather polishing set of cups? I built a set using ABS couplings, bushings and pipe and used the plastic pipe caps (blue or orange) available by the box at Home Depot. I pre-form the caps in hot water to cup them inwards, then glued leather circles by the purpose built “ears” onto the caps. Continued use will form them to the spheres. I have accidentally ran them dry and the leather burns through, but with practice, the spheres get a nice deep shine. I can send pictures if you like?
@DirtCleanerVideos
Жыл бұрын
I have some cups awaiting leather. Just have not got around to it yet. Would love to see some pics of your set up. rocks@superiorlapidary.com
@paulmanhart4481
Жыл бұрын
You should have three perpendicular axis and randomly vary the rpm of each motor to eliminate any periodic structure from the grinding process. This will give you the best sphere.
@DirtCleanerVideos
Жыл бұрын
Agreed. Just can’t change the rpm of the motors. But I have found it works great as is.
@kevinkaszyca3267
3 жыл бұрын
David, do you have any videos of making spheres out of a large petoskey stone?
@DirtCleanerVideos
3 жыл бұрын
I have not. The process would be nearly the same. I may skip a few polishing steps due to the softness of Petosky stones. As soon as come across a suitable one for sphering I might do a quick video.
@ravenburns3539
Жыл бұрын
What size cups correspond to what size spheres? And is it the same 22 degree bevel on all of them that you find works best? Love the video thank you for helping me start out in this kind of stuff.
@DirtCleanerVideos
Жыл бұрын
The best I can tell you is what Highland Park Lapidary publishes: 1" 25mm 1" to 1.4" 25 to 35.5mm 1-3/16" 30mm 1.3" to 1.6" 33 to 40.5mm 1-3/8" 35mm 1.5" to 1.8" 38 to 46mm 1-9/16" 40mm 1.75" to 2.1" 44.5 to 53mm 1-3/4" 44mm 2" to 2.6" 50.5 to 66 mm 2-1/4" 56mm 2.5" to 3.1" 63.5 to 78.5mm 2-1/2" 63mm 2.8" to 3.5" 71 to 90mm 3" 75mm 3.4" to 4.1" 86 to 104mm 3-1/2" 90mm 4" to 4.9" 101.5 to 124.5mm 4" 102mm 4.6" to 5.5" 117 to 140mm 5" 127mm 6" to 8" 6" 152mm 7.25" to 9" 22 degrees is good. However I just made mine somewhere close to that.
@ravenatorful
Жыл бұрын
@@DirtCleanerVideos thank you tons, you just made my day
@DirtCleanerVideos
Жыл бұрын
@@ravenatorful Thanks.
@alan67530
Жыл бұрын
I'm not following the measurements. In inches, what diameter cup would you suggest to make 3" to 4" spheres? Do you have any video of showing process from raw stone to the point where you put it in the machine?
@olheghtt
2 ай бұрын
I can't find those grinding pads, Amazon has something that looks like them but they're all polishing grits. Are they on Amazon and did I miss them. What are they actually called.
@DirtCleanerVideos
2 ай бұрын
The grinding cups are a separate beast. There are a few places that sell them. www.hplapidary.com www.sphereheaven.com wwwsphereproducts.com and also Covington. If you can braze or know someone who does they can be made in a home shop by brazing the diamonds to cast iron pipe reducers. The polishing pads are available from many places as they are used in the flooring and countertop industries.
@olheghtt
2 ай бұрын
@@DirtCleanerVideos thank you 👍
@judithliebaert
2 жыл бұрын
David, are you selling your spheres? I'd be interested in purchasing. Edited: Found your Etsy shop!
@DirtCleanerVideos
2 жыл бұрын
Lots to pick from!
@iantherealg
2 ай бұрын
Do you need me to send you a dial indicator to help you center the cup? 😆
@DirtCleanerVideos
2 ай бұрын
Turns out it is not that critical. Being just a bit off of center helps with the random turning of the sphere.
@shaikhabdulrasheed7488
2 жыл бұрын
Hi.. David i want grinding cup can you explain me how to make a grinding cup
@DirtCleanerVideos
2 жыл бұрын
The grinding cups can be made a fewe different ways. I use diamond embedded brazing rod and braze the diamonds onto the cup. Or you can get 'segments' and braze them on. HPLapidary.com might have the segments. I hope to make a video in the future on this.
@007DarthMan
2 жыл бұрын
@@DirtCleanerVideos Do 'segments' work better? Worse? why choose to braze over that?
@DirtCleanerVideos
2 жыл бұрын
@@007DarthMan I don't believe there is much of a difference. Both need to be brazed on. both have diamonds in them. I have used segments on my Highland Park High Speed Sphere Machine and they work quickly. BUT: it is a much faster machine. I would use what I could more easily get.
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