The best way of crushing granite for an epoxy granite build! 

OMG! This Old Tony level of humor.

Couldn't help myself. Every time you show footage of it in action it's just like if I'm seeing cookie monster: Omnomnomnomnom.

What are the jaws made of? Did I miss that part?

It seems like it's worked out just fine, but with this kind of arrangement if you wanted the fixed jaw to be a bit more solid you could easily add some jacking screws in the plate behind the jaw to give it some support. It would also give a convenient fine adjust

Can you do about 10 minutes of video just crushing? So satisfying to watch. Thanks.

Never ending story: Rock Biter. Good one!

"You can't make things idiot proof because iduots are such ingenious fellows." COL "Mac" McMasters. Words of wisdom from one of my bosses.

You may try the crushed granite available at feed/farm stores. It's used with chicken and turkey feed. They need to have rocks in their gizzards to grind their grain. Turkey crushed granite is larger than chicken.

I think technically those are flange bearings not pillow block bearings. A pillow block bearing is a type of pedestal bearing that holds the shaft parallel to the mounting surface.

Finally a video of someone building a crusher! Nice work!

Should start a hydraulic press type channel, teeny tiny rock crusher channel!

In addition to EG have you considered just using solid granite in places where it's easy to work, like as the machine base? Small toolroom grade surface plates seem quite reasonably priced considering, and then all you need to do is drill inserts for mounting. I'm considering this approach on a fixed gantry build I'm working out right now. I think I'll be able to do the entire structure with just 4 solid blocks and just using epoxy grout for gantry leveling and not having to worry about aggregate at all.

Hmmm... aluminium blocks with stainless screws....setscrews where keys should be used.... shortcuts ! You shouldn't do this, you know.... I knew a chap, who ended running for prime minister when he was 62 years old, but in his early years he had the weird habit of squeezing a tube of toothpaste in the middle rather than the end ! This to the dismay of his wife, his mistress, his illegitimate daughter and his neighbour's aunt.... Long story short... this cavalier behaviour in youth eventually led to string of horrible murders, a fortune being squandered and decades long prison sentences ! Just to say... be careful ! By the way, what about Dolomite instead of granite? This is a type of marble, and you can actually get it powered (Dolomite dust) in 40 Kg bags... (you can get coarser grades too) Toodles! Paddy

This is exactly the video I wanted to see, I'm also planning on building my own small crusher for almost the same purpose.

Locally I can get 0-2 mm, 2-5 mm, 5-8 mm, for paving and decorative purposes. I thought that would suffice. Is fractioned crushed granite not available where you are? I eventually went with natural granite, found two unused headstones cheaply. What's your plan for handling tension? Steel reinforcement or just trusting epoxy?

I don't know why but I just started laughing uncontrollably as I watched that little thing crush rocks. Don't get me wrong, I love the build and you did a wonderful job. What made me laugh was how us "Builders" will spend hours upon hours thinking up ways to do things and build something that will do it for us and by the end of it all, find ourselves looking at the end product for about 10 seconds, tilt our heads in satisfaction or wonderment or laughable satiation at what those hours actually produced............then move on to the next thing. As I write this I keep getting the visual of your shaking the bits of rocks and fondling the samples of just produced crushings and wonder if you said the same thing, "hummmmmmmmmmm that's nice.......moving on" while chuckling. I truly loved the build! I hope you take what I said in the same perspective I was trying to say it with.

Now I'm wondering how well epoxy granite would work as a surface plate, or other granite metrology accessories. It would be pretty slick to mix together gravel and glue and make tools that would cost many hundreds of dollars

Cookie Monster! That's what I thought of in the last scene when the crusher is working. ha ha.

If you drill and tap a hole behind the fixed jaw you could thread a bolt through to stop the jaw from sliding. A bit of rubber cement should help keep it from turning out. Might help keep the crushed size from getting bigger during a long crushing run.

You know you can’t rent a crusher (any size) for less than £100/day, right? That’s what I did.

Can't agree more that there's nothing more addicting to stencils. I gave up my heroin addiction so I'd have more money to buy stencils.

i hope your planing on coating your mold with several coats of epoxy, torching out the bubbles on the face of the mold, then after it tacks up placing a colour or fine aggregate epoxy layer over that.... then pour your thinker mix over that.

Huh. I didn't know I need one of these, but apparently I do.

Dude that works really well.. so simple too... and no its no suprise you built your own rock crusher.. that kind of stuff is why we follow you!

That’s awesome, when you mentioned building a rock crusher at the beginning I was totally with you on “that would just be silly” : ) nicely played.

I enjoyed your build. The only comment/ criticism I would make is the stainless screws holding the bearing blocks for the eccentric shaft are carrying all the oscillating loads. In a full size build, the blocks would be spigoted somehow to direct the load straight into the side plates.

Nothing is going to be idiot proof they make better idiots everyday. I take umbrage with paint abuser and you messing with your nuts. Get a wrench Mr. Machinist! Last but not least. I iz truly proud of you. Great job. Life without a little razing is just not as fun.

i would have probably gone bigger. and used automotive hub and bearing assemblies.. so that automotive flywheels could be drilled and bolted to the hub and bearing wheel flange... since these assemblies are splined the hardest part would be making the eccentric shaft with splines that match the hub bores.. this would allow the hubs to by synced.. offset weights could be added or the flywheels could be drilled to remove some weight to counter act the offset weight of the eccentric shaft..

Hi! Great video. At least I learn some mechanical system designing and how it actually implemetes in real life machine designing. One request to you, make another set of videos on "Cone crusher" and its different functioning components as well as its working principle if possible. Thank you very much.

hi very nice design i have been making one like this but to crush large rock and brick on first attempt the rocks just bounce at the top, you built a rocker in the bottom but idont think this needed, i have used springs as dampers, when i have got mine running ok i will put it up, do have a look

Decomposed Granite which is used as a paver base tends to be 1 to 8 mm. Should be pretty easy to screen.

Loving the channel. Thanks for taking the time to share. I would enjoy a video about your initial design thoughts and considerations when approaching this type of project. Essentially, a video of the first 5-10 minutes when starting a project. I’m sorely lacking in that area and it seems that is part of your strength. Cheers man.

A girlfriend ;-) operated bang bang maxwell hammer came down tilt hammer or tail helve hammer is the easier setup using a pivot in the helve and a simple rotational mechanism to lift the hammer(s) up and gravitation is doing the rest. Various frequencies of lift provides the different sizes of crushed material. A sieve for sorting the size.

What are the jaws made of? Did you do anything to harden them?

I hate to start projects to start a project... you are just crazy, and I like it :D

Awesome!

This is so cool! I was thinking of doing something different but I need the same result for the same purpose. I was thinking of putting some crushing media in with pieces of granite chunks similar in size to what you have. I was considering a 5 gallon bucket attached to a motor w/a pulley (like a rock tumbler). What I have seen on of that on RU-vid let's me thinking it would make granite powder (after a couple of hours). Did you consider that approach? Do you happen to know any reason why you need bigger pieces mixed in for epoxy granite?

That’s not a pillow block bearing.

Num num num num! GRANITE!

What about baying crushed Granite

I actually wasn't expecting this video to be of real interest, so YAY! I was wrong I did find it interesting. Kudos to you.

Superb

I'm looking for a machine like this that turns stones into fine dust. Do you have any ideas or suggestions?

This is great. I could not figure out what this thing was going go be from the previews you were sending out. I'm excited to see the new mini lathe build.

I've been around full size rock crushers pretty much my whole life from gravel pit sized to over 100,000 ton per day open pit mining crushers. You get A for effort on actually making your own crusher, but to be honest few areas anywhere wouldn't have some type of roadway rock cuts, stream or river beds with an abundance of rock sized from sand diameters up to automotive sized. Home and garden centers, metal suppliers etc stock a variety of screen and wire mesh sizes so that, a shovel and a large plastic garbage can you could screen all you need in half an hr. Even a 2 hr drive each way to go find it would be a whole lot easier than building your own crusher and then still having to find a ready supply of rock. Just my thoughts and worth just about nothing, but it's another way I guess. Your crusher is running a bit fast, jaw crushers run slow so the rock has time to move down each time the jaw closes and opens. Yours still works well enough for it's needed purpose, but slowing the rpm down while upping the torque level would make it more powerful.

Thanks for sharing. Love the engineering perspectives. Keep the videos coming!

I've got a few of those HSS anti-tampers myself, handy little things

Wow, this thing runns so quiet. Nice build!

Where did you buy your supplies (in particular the granite and epoxy?)

How did the jaws get made?

Looking forward to the build. I've been interested in epoxy/granite for a while now but have seen very little content on it.

nice video, but you forgot to tell us about the jaws. have never seeb those...

That's a cute little machine. It needs the googly eyes as mentioned in a comment.

Do u sell them

It looks alive. It is chewing stones haha

requite half hour of omnomnom footage of the thing crushing and crushing

What was the thinking behind the direction of the serrations on the jaws? I would have thought you'd want them 90 degrees from that, so that it's able to really grip the rocks

Love your videos! Really looking forward to the CNC lathe (re)build, and maybe the desktop mill that naturally has to follow?? :-D

Addictive....

Quite amazing and so well executed. You have great skills.

sir , can i buy the scematic drawing from you?

"OH MY GOD" spat my coffee! Hahaha sick man!

Dudeee that’s killer!

The smoothness of the machine is very satisfying

I would like to know more about making an eccentric shaft.

12:18 😂👍

Awesome!