DIY No-Weld Rock Crusher using Makita Angle Grinder -- Powerful and Effective
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- เผยแพร่เมื่อ 11 พ.ค. 2023
- In this video I demonstrate the construction and use of a garage-made rock crusher for casual gold prospecting. A welder was not needed. The crusher is fast and effective, with a throughput of about 30 kg/hour to #60 mesh.
Keywords: Gold prospecting, gold ore, ore crushing, angle grinder rock crusher, gold extraction.
an excellent video! and there is another use than crushing rock for gold: we model railroaders need very fine rock material as the "dirt base" to use in our scenary work. you can buy already prepared material (very expensive) or you have to try and get your favorite rock crushed down to size yourself. Your device is perfect for that! thanks again!
Yeah, this would make a nice grinder for your model railroad needs.
Excellent work. A really well engineered and very portable unit. Cheers from Michael. Australia.
This is awesome. I was visualising something similar but could not quite see the finer details. I thank you for filling in the blanks for me. The square wooden outer is clever. A couple of thoughts. I know carabiners are cheap, although not a buck in my country, but I would probably buy a pack of Hard Facing welding rods, which is a super hard material that you build up on wear parts. Then give it some more weld every so often as required. Then instead of the large metal tube you purchased, I was imagining using an old car brake drum. Or weld up a 10+ sided polygon from smaller bits of flat bar so that the rocks bounce more which should pulverise them even faster. And for sound dampening, I wonder if glueing the large tube in place with silicone instead of epoxy, being somewhat flexible there will be less conduction of vibrations for the neighbours on a quiet tranquil Saturday morning! Maybe a strip of rubber glued to the base and side. To make it much less of a drum.
Thanks from Australia looks great
Excellent video. Probably the best small mill I've seen. I really like the lack of dust and ease of replacing the carabiners. Good job!
Fantastic build on that rock crusher mate , well done ,it does the job excellent, a little bit of working with what you got can do the trick In expensively, way to go ,thanks for sharing your build ,it will help other to make one for them selves saving heaps of money on the over priced ones out there. 👍
i have several teachers who i respect greatly , you have just joined their ranks , many thanks . I’m a recently retired prop master also in LA and have fashioned props for on camera and have made many tools over the years for various projects ( for example the designer of wolfgang pucks at LA live wanted hand drilled holes in the floor to ceiling iron lamp shades / and i had the winning bid and cut 13,666 holes in a few days using a modified hole saw ( normally this work would be automated but this was purposefully crafted to be visually more organic and i admit as silly as it sounds it did look far superior aesthetically than the original water jetted prototype) but i digress , your build is meticulously thought through , your explanations were clear , concise and left nothing out without bogging us down with the “ overburden” of useless and/or redundant verbiage one could expect from me or the very brainy but equally long toothed C. Ralph 🤠.
I subscribed on the first video i watched of yours , have “liked” each subsequent viewing in appreciation and am likely going to be “liking more in the near future . Again , Thank you for your time sharing your knowledge and experience in this way .
Hi Jeffrey, thanks so much for such a wonderful comment. It's greatly appreciated. -- Dave
Super clever, thank you
A dedicated Shop vac and you got it done, never have to remove the cover except to replace the internal parts.
Thats a great tool for sampling i. The field. Worthless for production lol. Well worth the effort to make DIY. the commercial ones cost cost around $700.
As with everything final product you made you put alot of thought into it and covered every angle.
Good job Dave
Great work
Que belleza de aparato, muy eficiente. Ingenioso!
Thank you sir.very usefull video.
Great idea , put a rechargeable grinder and you could use it anywhere, thanks for the ingenuity.
Yeah, it grinds quite a bit of rock with the charge on a 5Ah battery.
Absolutely loving your innovations. How can we meet? I live in Los Angeles.
This is so much nicer than the one I made, lol. Nice work! I might have to build myself a new one now.
Though I do get similar size reduction, with about 50% passing my 60 mesh screen as well.
Can you tip it upside down to get the crushed material to come back out the top tube instead of unscrewing the side plate?
@@LetsCrushRocks Yes, that works also and it takes about as long as opening the side plate. -- Dave
Another fine creation and one step closer to getting G' :)
"Keep Ithaka always in your mind.
Arriving there is what you’re destined for.
But don’t hurry the journey at all.
Better if it lasts for years,
so you’re old by the time you reach the island,
wealthy with all you’ve gained on the way,
not expecting Ithaka to make you rich."
C.P. Cavafy, 'Journey to Ithaka'
New subscriber here.
Love this tho.. these things are expensive to purchase. Nice to see you can make one reasonably
Just a simple suggestion. Use a short sction of link chain in place of the spinner and carabiners. Easy and cheap replacement, but you may need a "square nut or block" under the bolt to keep the chain centered and balanced.
Thanks, James!
Very nice unit, I have a mighty mill that is similar but yours is alot less expensive and does the same job.
This is must have absolutely for the mineral prospecting
Agreed. It's surprisingly fast at pulverizing given its size.
That's a cool little DIY project. You could empty it by tipping it upside down & shaking the content out the feed in hole. A funnel too would be good when feeding it & not spilling the material which I noticed was happening. Thanks for sharing. John from New Zealand.
Hi John, I now use the machine just like that. It works well. Thanks.
👍 10/10
Nice portable crusher. When do they go on the market?
You have come up with a good cheap crusher. I can not draw it for you ,but being you, I think you will figure it out. To save changing the soft metal flails. Consider using grade 8 bolts connected side by side with replaceable stacked #8 nuts on the bolts. Much harder. Just a thought.
Nice idea. I'll see what I can do. -- Dave
Love your video. Maybe you can sell them on the cheap so that more people can afford them?
I love the boredom of an intelligent mind, breaching into action to overcome a said need.
Great idea for those of us who don’t do welding. Thank you.
I wonder if you had the motor running when you poured the +60 mesh back in if it would crush more of the material better so it didn’t have to try and suck it up of the bottom to crush it.
Good question. I'll have to try that to see if it makes a difference. The courser material eventually gets crushed if I keep cycling it back in. -- Dave
I could use hinges and that way it would be easy to open, and bigger holes tho size the rocks that leave.
I built one of them & brought a new Angle Grinder 4.5". Almost burnt it out in seconds. I now gone with a 3/4 Hp electric motor I had lying around. It doesn't smoke.
Nice to have a big grinider!
@@orophilia No, same grinder. 10" or 250mm. I just rigged up the electric motor to it.
Very nice crusher! I love it is made from wood and glued! It reminds me omegageek64 crusher. Very nice job!
Probably if you want it continuous you could use a shop vac ar outlet (like omegageek), or cut out a piece of pipe so it will fall out more by gravity (like in mbmmllc hammer mills). In any of those cases, you could cut this 60-mesh sieve into a filter, so only smaller particles can go out from the crusher. And maybe, just maybe, the crusher works as a strong enough "fan" to push powder out, so a small cyclone could be just added to the outlet pipe to collect powdered rocks. But for that I expect a hole on the bottom not on the side would work better.
In any case, this is a wonderful piece of equipment Sir!
Thanks for the ideas! When I get back to this I'm going to try to make a crusher that uses a small flow of water through it. The slurry will then get dumped right on to the shaker table. If you haven't already, please see my video on the latest version. It's now a Bump-Sluice shaker design. -- Dave
@@orophiliai I will!
with water flow through crusher, I would be aftaid that stuff will damp crushing power, mbmmllc hammer mills do stuff on dry material and wet it after. I think there is reason why it is done this way :P
Definitely for that try first without shaking table just to add some water by top pipe without modifying this beautiful machine :)
I know shop vac would make it not as mobile as circulating water, but small car vac plus some cyclone could be enough for that.
@@ejkozan The joy of experimentation is about failure and fixing, and sometimes abandoning the project altogether. -- Dave
have you used it to pulverize computer waste for gold recovery??
No, but that's something I'd like to try.
Can you supply just the grinder housing without the grinder. If so let me know.
I'm sorry, Stephen, I don't make anything for sale.
If the carabiner touches the pipe , will that damage the tool ?
Is it important to have that gap as small as possible ?
If your outer cover was steel plate screwed and epoxied to thick ply , could inside and outside plate be made of say , 1mm thicnkess ?
damn you make good stuff - God Bless you.
Hi GSF. Well, I don't know what would happen if the carabiners touched the steel pipe, but I can't imagine that it's good for reliability. :) Yes, I think 1 mm steel plate would be adequate for both sides if epoxied to plywood. I don't know about the gap; maybe it's not important because the chaos inside the tool brings the ore to the flail eventually. -- Dave
@@orophilia I imagine in the process of making your fine tool , you must have drilled your holes attached to the carabiners to give an initial gap.
What was that gap ?
What gap would you suggest
?
@@goldsluicetinkerer I made the gap between the carabiners and the wall about 1/8"
Can you build me one? Also in southern California. Wanting one of these to crush oyster shells
Thanks for the great comment. Sorry, I don't manufacture equipment. -- Dave
That’s 10x 1.5 mm on the side isn’t it?? Looks bigger than 8 mm
After many hours of breaking ore rocks down to less than a golfball size to feed another flayer I just had to say enough wasted time so upgraded to a hammer mill that does in an hour what took a month of weekends... which regained my sanity... bottom line... get the tool that does the job you need... fast! Two Harbor Freight grinders: one for metal cutting and another for polish/sanding are always ready - no disc swap required - two HF grinders are way less than one Makita... grinders are like toasters... when it breaks not if... Let the garbage man take it away... Thanks!
Hi Douglas. Yes, always get the best tools that you can afford. Excellent advice. -- Dave
@@orophilia Afford is part of the equation but service life should be considered too. Good luck out in the Mojave Desert.
@ 6:23 IPS = Iron Pipe Size
Thanks!
Would be better if you have drawings and specs.
If you'd like to build it, I can make drawings. Are you familiar with SketchUp?
@@orophilia Yes some what...that would be very nice.
somehow, use a smaller carabiner and a link of chair to wear
Yeah, that would be an improvement.
And for what is this?? Gold winning or what?
Hi Claus. Yes, for extracting gold from rock. -- Dave
I have played it several times and can't quite make it out: a 6" ------- pipe?? Did you order it cut to size or was it a standard piece? Those details would be fun "on screen" like some of the other parts - or in the comment section. I know it's hard to come down to "bozo" level - but us bozos (I hope I'm not the only one) need lots of detail. That's damn clever - I love it. Thanks!
I need to work on the audio, it's difficult to find a microphone that works well in various conditions outdoors. I got the pipe from eBay and I didn't have to cut it. It was advertised as: 6" ID X 2.25" steel pipe, 1/4" wall thickness. If you've got a metal store nearby they should have it. -- Dave
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That qrusher is that what wee need
You should have made something sensible, realistic...
Just to crush a few bebbles, you need to on/off again & again..???
It should have been continuous working type...
Yes, I agree, but that's what you get with an angle grinder, and it works well in the field on battery power. I'm building a more permanent rock crusher with a 1/2 HP motor, which will be more convenient in the shop. -- Dave
Damn you make the best videos - and the best stuff.
I wanna be YOU - Swap ?