I respect that he shows it in action and doesn't cut off right before it happens and talks 20 minutes of BS before he finally shows it uncut. +respect

I've thought about this (a 3D printed PLA shredder) several times and always kind of blew it off as ridiculous, but this video turned me around. I wouldn't mind seeing this fleshed out with a sturdier gear box and perhaps metal teeth inserts. As it is, I'm very impressed. Excellent work.

The small gaps are probably from the pieces deforming from the hammer head strikes. You should use a striking plate between the piece and the hammer to spread the force as much as possible.

It hurts seeing how you hammer those blades on tube. You should have put gear on the wise and hammered tube through some wood. It insures nothing is skewed and you do not damage any surfaces.

More details about the CAD process would make this twice as interesting. More actually. We've all hammered together and partly broken poorly toleranced parts, but describing the design process that ends up with a well manufactured product would be invaluable! Love your videos

Nice! What about adding metal blades to the shredding wheels? It would still be mostly 3D printed and get closer to the results you want.

Also, the speed of both rotors should be different, so it just does not fly through. It should solve the problem of not really shredding the sturdier parts.

A splash guard is indicated. Than more teeth for shredder discs and if you can metal insert plates as cutting edges for less wear. And metal gears and at least 80% infill for the gearbox housing.

Using these for aluminium casting would be a great start to getting some real shredder performance

I'm quite interested in how this would work with shreding fabric, especially would it still work if the shredder teeth were more fine. I definitely did not think those plastic teeth would hold out at first, very impressive.

..a really interesting and fun way of learning mechanics.... and teach it to others perhapaps, i guss many kids will love this... suggestions: sychronisation and locking of the shedder axis to limit movement the teeths can be made of thin strips(teet width) of metal that is shaped to fit (it is the part that trasfere the initial force) drive both shredders simulanesly...not just one (to balance force and reduce wear signifficantly) the gaps btween the induvidual shredders are faar to wide the shedders do not need to fit as snuggly to the square aluminum bar as long as they can be locked and pushed together (u can easily do this by two parts screwed into eachother, when screwed out thay puch the parts together) the base dont need to be as snuggly fitting to the shedders axis (thers no grinding here...its just for holding what ever u shredd in the shredder) ..ps.the reason the plasic wheels take so much damage is because they experiance a force from on point...doubble gears on opposite side of the gear will reduce it...but it also make the gear system more complex... ex X-O-X (where both X are driving the O axis...spreading forces over two poins 180 deg from eachother..for even smother leveling, 3-gears 120 deg apart..

CRAZY!!, I LOVE it. Your dedication is amazing, keep it up.

Sweet animation Mate! I know how long that takes (I'm learning with my son). I really love seeing what you come up with using your printers and brain, awesome work. 👍

Old steel brake rotors typically just get thrown in the trash but they could probably be cut into shredder discs using a plasma torch. Get an old gas powered wood chipper or lawn mower engine to power it and you can make a shredder out of mostly trashed items.

pro tip: put the aluminum square tubes in the freezer for a couple hours so they shrink just a little bit, it'll make it easier to get the shredder wheels on. and like other commenters have said, put something between the hammer and the printed parts to better distribute the force, or use a rubber mallet if you have one.

I'm sure someone else has covered this, But the reason your shredder won't shred, is the gaps between cutting surfaces. the opposing teeth should almost touch as they pass one another, and the gap from one rotating assembly to the other should be very small as well. The only thing you cannot currently account for is material weaknesses and flex. if you drop a hard object in, does it open the gap between both cut heads. your aluminum core is great but it doesn't stop the frame from allowing movement. Improvements to this design could be making the frame from extruded aluminum like your 3d printers are made from, printing your gears from a harder material, or have PCB way make them. Either way, fantastic video. I would hope you will revisit your designs with improvements in the future.

You have inspired me to get into the hobby. I ordered an adventure 3 pro last night. It’s a cheap budget machine but I’m looking forward to getting into this and I hope to maybe evolve into designing and doing projects like this. Good work!

Have you thought of using cast aluminum? Here on youtube, myfordboy has some really decent videos on using 3D printed parts and casting them in molten aluminum. The gears would likely need to be made of aluminum bronze for the increased wear resistance and strength, but the shredding teeth themselves could probably be made of cast aluminum and survive fairly well. Maybe then you could shred aluminum beverage cans, PET plastic bottles, etc.

nice shredder, cool idea!

I don’t need one, but want one! Very honest video. I like your style 👍🏻

Great project! Thanks for sharing!

It looks like a great salad shredder. You just need to add a wood or cardboard shoot on top so the items stay in there the entire time instead of flying out. It would be cool if you put some sort of metal on the tips of the blades. Maybe something like a razor blade or some other cheap metal part attached at the blade tips. Good job. It may have slid on easier if you sanded the inside just a tiny bit, especially the corners and definitely use lubrication. Great build. I enjoyed the video.

I put the plastic on to stop lube from flinging. I left the shredder open to not prevent the debris from flinging as it fell, badly, into a cardboard box on my floor. Hell yeah my guy 👍

Very good. Maybe a close loop control system will improve the efficiency, by running the motor in low speed but increasing tork when needed (but is much more complicated system, needs calibration, sensors, ...)

Awesome.. think you nailed the gear reduction. Now instead of will it leak, you can be will it cabbage?

NGL, I was grinning ear to ear watching this. You, my friend, earned my sub.

Great project...I liked the way it took 'bites' out of those apples. The tooth depth is just simply shallow enough, that it did not exceed the elastic limit of those fine sheets of plastic. they are just too flexible, to be broken with that little tooth depth. I agree, the transmission needs a little refinement, but, This would be perfect for making salads, it shreds lettuce and cabbage absolutely perfectly. I don't know if ABS and PLA are considered "food grade" or not.

Have you thought about adding metal (carbide or something) tips to the teeth of the shredder. They can be replaced and reduce wear of the shredder parts. you could use just some metal squares screwed into the pla where the teeth would impact that way the metal would take most of the abuse, and as previously stated, could be replaced.

🤣"Dry aged cheese burger" you made my day!

Apple 1: *“I'm not ready to die!”* Apple 2: (dead) Apple 1: *“Nooooo! Wait bro, I'm coming!”* (jumps)

Hi, you may freeze aluminum profile before installing plastic stuff install. Due to low temperature metal should shrink and you may easy install without using hammer. I used that technique with bearings and it is worked for me...

I would heat the aluminium bar just enough for the blade plastic to melt a little bit when inserting them. I would do one blade a the time and when all of them fit well, I let cool the aluminium before inserting all of them.

Awesome work! Just wondering, did you think about using machinist inserts that could be screwed onto the faces of the cutting blades?

needs a hopper around it to keep stuff from flying out. it'd be good for shredding stuff for a compost bin.

Rebrand this as a compost shredder, and you solve the issue of it not being able to shred hard things! Great project!

I used metal shredder from paper Shredder. and a 3500lb winch motor to turn it. 3d printed mounts and framing to hold it all together. It will shread anything and torque 3/4 plywood reinforced by angle iron to 45 degrees should it jam.

Dude he could just change the shredders design to put indexable inserts into it. I am pretty sure it would work very good

Make a sacrificial piece to hammer on. Preferably from wood.

for the hammering what about a steel pipe that fits over the central rod? needs to be cut at a right angle and have slightly rounded edges.

I think the teeth need to pass each other further. The flat round radius next to the teeth radius could be smaller and the teeth radius bigger. I think that's how the big metal ones work so well, also a much slower gear ratio would help a lot with torque and grab opertunity too in my opinion. Too much speed means a lot more strife on the gears if it does jam. I love projects like this. Thanks!

"Most interesting thing I have ever made" "...Dad?"

Fantastic work, dude! Really well done! 😃 My mother does compost... It would work great for her! Anyway, stay safe there with your family! 🖖😊

I think you're a madman and I love it.

when i was little i was obsessed with shredders and always wanted to 3d print one, this video is kinda a dream come true for me.

i think this is great, would work well in a food composing system

Kinda reminds me of a Weima ZM series shredder. Two broaching knives to pull into the cutting might help.

You've heard of The Salad Shooter well now we have The Salad Shredder. You should try throwing some carrots, radishes and other veggies in there and see if you can chop up an entire family size salad in minutes.

I love how you put a cover over your gearbox to keep a little debris and lube from flying off, then proceed to shred your groceries all over the floor. Lmao

Great idea, maybe try adjusting the rollers to be thinner where there is no teeth, then have a solid piece there so that whatever part that is in there would need to be "grated" because there is a solid piece blocking it, i dont know the name for it but in your black PLA, imagine fingers that are solid that extend in about 75% in, at a 90 degree angle of the 2 shafts, the idea is to not allow pieces to be pulled in by the whole roller, but only pieces by the teeth, like many little nibblers. For your gears maybe try some harringbone gears, if you still have issues due to torque i know that people 3d printing RC cars use polycarbonate for their gears sometimes too. Love the idea though, I could see people using this for composting, or even pet food prep. Cheers!

I've always wanted a small shredder for cardboard and styrofoam to put in recycling.

Very nice project well done! There is a very clever chemistry hack that transmutes the plastic. If you coat the teeth with super glue and fixer spray, the plastic becomes super strong! And if it can then shred plastic, this machine can save a fortune!

a perfect compost bin shredder.. will saves weeks of natural breakdown

Very cool project that worked well in my opinion. Imagine using this to pulverize kitchen scraps for composting. Maybe add a domed lid to keep items from flying out. A lid doesn't make sense for this video as it would block the view!

I am impressed with the hard work you have done. I am not for sure if you are familiar with hydraulic press. It is a easy way to insert object in without hammering which result expanding the parts. From that the looks, it seems to be dangerous to operate the machine 🙂.

If you didn't tap the burger, you'd never know it wasn't made 10 minutes ago. Scary.

You should use chevron gears and cut aluminum cans into strips and somehow attach those stripes to teeth surfaces, so you can shred harder things.

Nice Some herringbone gears might help with the slipping in the gear box

Try and print a larger centrifugal pump and use a brushed washing machine motor, they are insanely strong and fast and run off of over 12 volts (way way over)

A new twist on a food processor. A problem with a typical food processor is that if you let it run too long, the contents become overly shredded, and you can easilly turn your onions to sludge instead of shredded onion. Your shredder does a pass, ONCE. If you put fine adjustment on your shredder, you might have a deterministic food processor where the first item through is the same as the last. Perfect sizing. Its like you are on the cusp of a new food processing machine.

The reason the flat plastic isn't damaged much is not because of the power it's because of how wide the gap between the rollers is

I've been wanting to do this for quite some time, except I plan on casting all these parts in metal.

love the non-traditional cider pressing

Attach metal blades on the leading edges of the shredding blades. The same way lathes work. More shredding ability and will save the edge of the shedding blades.

for this sort of things, you should have made an orbital gearbox instead. way stronger connections

I would sacrifice the counter space just for the lettuce-cutting abilities. Good stuff.

Once you have the power transfer issue solved you will run into the problem of the cutters wearing quickly. In order for the cutters to last and cut well they need to be made from a harder material than what is being cut. When I was working in the recycling industry the cutters on our grinders were made of hardened tool steel with tungsten carbide cutting edges welded to the cutter ends. Those were used to cut aluminum and plastic, but were capable of cutting light gauge steel if necessary. I think that a decent solution that would allow the cutters to be 3-d printed would be to electroplate the cutters in nickel. That would provide enough surface hardness to keep the cutters from wearing when shredding plastics. You will need to adjust clearances to allow for the thickness of the electroplate.

10:10 now that is rather optimistic. what about adding a heavy flywheel? what about electroplating the shredding part to make it harder?

I know that aluminum scrap shredders have the knives spin at different speeds to increase shredding action. Maybe this would help for version 2?

Mc Donald's dry aged cheeseburger :-D that made my day haha!

I would use 2 motors, and a decent psu. Higher gear ratio and the schredder maybe could bite through plastic

How about using utility knife blades stacked as teeth for the shredder wheels?

Add a flywheel to take the torque spikes and push it through even if the motor cannot take it.

You should try to add small metal plates on the tips of the blades

First video iv seen form you I love it, do you think if you had pcbway make you those parts in metal it would shred pla no issues? And how small would the pieces be like could you make a 3d print recycler out of it?

1:21 all about that drip 10:50 herring bone gears could remedy the slipping

the problem with plastic is that it deflects. this makes a decent compost shredder though.

Foodshreder, one step closer food printer!! Cool i like the idea:)

If you coulkd mount metal teeth, or even a harder plastic tooth then it would easily cut stronger material

"Why did you use ABS?" - "I ran out of blue PLA". Yup, that sounds like 3D-printed-pumps guy xD I'm also kinda surprised that you didn't use your modular planetary gearbox for this setup. As far as it demonstrated in the other videos, would it probably not have had those issues.

Cool project. Worked better than I would have expected.

If I made this shredder, I would use it for Old food like you are as a demonstration. For me I would use it To get rid of old food and throw the shredded bits in a composter.

It's always fun seeing PLA do some work!

I think I understand that the pressure of the machine is what "cuts" or rather pressures the material that you feed in to be torn... but why not add blades metal blades at the end you can get from cheap shavers?

Hydraulic press might help just need a hole to slide the shaft through

perfect kitchen mashine

Will be a good addition to next year apple juice pressing process :D

I wonder if a shredder build out of plastic would do better with longer teeth and bigger gaps where the teeth meet the other side.

Seems like one of those things you want to make with a slip coupling to save your gears, maybe a hammer style slip coupling to still make it shred a bit when it's stalled? Otherwise very impressive performance and build.

Love these projects.

coolest 3D printed salad maker EVAH!! P=

The blades didn’t need to be that tight of a fit. As long as there was something to hold them on each end then it would be fine and you could have used something that tightens with a bolt at the ends so it was easy to remove. If a blade breaks you can’t replace it easily.

but what you do have is a plastic form to set a casting sand mold where the plastic can be melted away and reused while the samd can and must be reused and the metal parts only need small clean ups, polish and heat treatings to the right places for strength ... i believe in ya man now to "forge" ahead in material sciences 👍

I think the shredder could do some real work if some metal teeth, say some squared up washers for teeth, also gear it down for cutters to move slower, with way more tork.

"From now on, I am running this machine on MAX power"!!! Question: WTF didn't you do that from the start? MAXIMUM destruction brother, yeah!

Now redesign it to mount a set of carbide inserts for the cutting edge.

You should add a clutch between the gears and the shredder to prevent shredding down the gears instead! 😉

It would be interesting to put a current sensor on the motor hooked up to an arduino or circuit that automatically reverses the shredder for a short amount of time to clear jams.

Soak the parts in boiling water to make them soft, also annels the pla making them stronger once cooled

Greatly appreciate your ideas and videos! Thank you!

It is useless as an actual shredder, but on a larger scale or just bigger input funnel, it would make a marvelous grape crusher.