Making a particle filter that doesn't wear out for my plasma cutter
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When I was designing the downdraft for my plasma cutter I was concerned that it might eject too much metal dust out of my shop and into my driveway. It turns out that I was right and as I've been cutting more I've noticed a real uptick in accumulated metal on the ground. To address this problem I built a filtering system designed to remove the bigger particles from the exhaust. Since I'm not concerned with smoke and really extremely fine vapor I was able to make a "solid state" filter that takes advantage of the inability of a heavy particle to follow a tight corner. It was inspired by cyclonic seperators on larger shop vacuum systems. From the testing that I've done it seems to work quite well and I'm pretty happy with the results.
These videos usually take a ton of work and a lot of money in tools and materials. I've made a patreon if you're interested in supporting the creation of these projects:
Here's some of the tools that I use in this video:
Hypertherm powermax 45xp with machine torch:
Hypertherm fine cut consumables (great for sheet metal)
100mm linear stage for plasma Z axis - easier than building:
Anemometer - cheap but seems to work well:
Downdraft fans - these things chooch!:
The best marker ever. Always in my pocket:
Cyclonic dust collector:

  • Husqvarna Enduro
    Husqvarna Enduro

    6:07 Is there someone else who can see the creepy wood eye looking directly to the camera?

  • zoladkow

    Talkin hands and no dad jokes? Creepy!

  • Lindsay Green
    Lindsay Green

    Look at tha plywood. You must be rich!

  • maruthu pandian
    maruthu pandian

    just subscribed, binge watched your videos. very informative and interesting.

  • Andres Tölp
    Andres Tölp

    Throw a huge magnet in there

  • Yani Haigh
    Yani Haigh

    I feel better about all the cuts in my hands after seeing yours! :)

  • Abderrahim Acheban
    Abderrahim Acheban

    Great result, How about making an other one but this time try a small tube

  • vachanl

    This concept is used in kitchen exhaust hoods , you can further prevent sparks by using ss mesh filter After the pvc cyclonic filters .

  • Adam

    This looks like a standard pleated air filter, except evidently does not function the same. Interesting comparison to draw nonetheless.

  • Adrian Elgas
    Adrian Elgas

    Got earraped thats why dislike

  • Crow

    How is no one talking about the fart in the beginning


    you should try the water or some kind of oil filtering like a bong.

  • Dulguun Otgon
    Dulguun Otgon

    Can tesla valve serve as a dust filter?

  • Kyle Bishop
    Kyle Bishop

    This entire video has me thinking of hood vent filters that go above fryers in restaurants.

  • Robert Mecalis
    Robert Mecalis

    Very interesting

  • togusa hirokawa
    togusa hirokawa

    love the homage to this old tony

  • Vaporized Matter
    Vaporized Matter

    7:30 getoutofmyheadgetoutofmyheadgetoutofmyhead

  • Samuel Sägesser
    Samuel Sägesser

    Seems to work really nice. I wonder if there's a component of just slowing the air flow down to give the particles more time to fall out. Which should work too, but would probably require a large volume.

  • ponyisasquare

    I just want to say that your videos inspire me to be a better 'maker'. Thanks for sharing your experience. Super interesting and makes me want my own lab.

  • Anti Communism
    Anti Communism

    Still dangerous for your lungs, I wouldn't put cost before my lungs if I were you, unless the filter you made matches industry standards of course

  • David Wilkie
    David Wilkie

    It's said that 5 Farmers will have at least 6 ideas, but Engineers know there's 5! problems of agreeing with someone else's opinions. More fun, or thinking for yourself takes longer but is less stressed. Ie the first filter needed is a Thought Experimentalist's scepticism?

  • J Mac
    J Mac

    pretty nice. i would have recommended lifting it up, to let the particles go into a collection tray. But hey, there's always room for try number 2.

  • Hans Zyfflich
    Hans Zyfflich

    These metal dust particles are way to small for a cyclone to work.

  • DripUprising

    This is the exact filter that kitchens have in their extractions to catch grease.

  • francis weir
    francis weir

    6 > 5.5 - now this is the quality content I watch this channel for.

  • Jose Batista
    Jose Batista

    I have considered doing something analogous for the durability of LED lighting, but I suspect I would find a horse head in my bed at some point. Come to think of it, that may happen anyway.

  • Luke

    I watched this video when it first came out and thought it was good I didn’t actually know it was you who made it because I found your channel again later !

  • Home Inspecting With John Hansen
    Home Inspecting With John Hansen

    So, after one year of use, I am wondering if there was an OMG day when you walk out after a light rain and the nice concrete driveway is rusted?

  • MrTeethpaste

    does it have to be rounded?

  • dustiest spade
    dustiest spade

    This design is used for the air vents for deep friers at my job

  • Harry72

    So how's this experiment going 12 months later?

  • Anatol Stuckey
    Anatol Stuckey

    The hard path intringuingly fear because disease terminally melt round a barbarous radiator. wanting, left neon

  • Idle Research
    Idle Research

    You basically just re-invented the baffle x3 Specifically the Grease Baffle used for grill hood-fans

  • werwolf waffen
    werwolf waffen

    In Siberia we use vodka(water). Big pool under and it,s ok.

  • Victor

    You could make a filter with a tank of water.

  • E M
    E M

    Neighbors and plants, why is there always a film of metal around

  • patti441

    msybe using some kind of filter using static electricity could be interresting to test ... but I dont think you like working with tens or hundreds of kV ...

  • ThatGuy

    This video feels like a alternate universe version of this old Tony

  • Tom C
    Tom C

    Why align the S pattern baffle vertically? Would lining them up horizontally and make the particles go up the S and get gravity to help slowing down more particles?

  • TheSar

    "If all else fails - I have a fire extinguisher" First principals of the engineering and design process right there - fail forward!

  • Matthew Palkovich
    Matthew Palkovich

    The bizarre draw reversely guarantee because snake identically park alongside a damp passenger. homely, unique cornet

  • lettuce muncher
    lettuce muncher

    7:29 ඞ ⍝

  • Zaddis

    At 7:30 8-year olds be like “OMG HE SAID AMONG US! DUN DUN DUN DUN DUN DUN... DU DU DUN... BO BOOM”

  • Dot

    7:29 for the what?

  • Vincent Irani
    Vincent Irani

    I would have measured airflow at the inlet before the filter rather than at the exit :)

  • teamidris

    Interesting. To be honest you missed a free trick there because the fans spin the air like a centrifuge. To get a good suction on a factory extraction system I had the fans in series and going opposite directions to negate that spinning air.

  • 4mar

    7:30 did he just...


    7:30 amogus amogus amogus amogus amogus amogus amogus

  • D

    Can't you use a giant magnet to catch particles while they are flying?

  • Galeere2

    I mean now that you have removed most particles with this trap, you may add a porous filter to catch the smaller ones, as it wont clog up quickly anymore.

  • sosnax1

    I would probably make the walls a bit wet like setting up fog sprayers once every while to make walls more sticky for dust

  • Chris L
    Chris L

    The reason your CFM measurements are off. The majority of air flow 2/3 is typically produced in the outer ~1/3 of a fan. You need to take multiple measurements across the face of the fan and then average per AMCA standard. If you measured at the outer edge of the fan you will see the increase in air speed. Those are pressure fans with decent duct lengths which typically produce more of a consistent cross sectional air flow pattern compared to a standard exhaust or circulation fan.

  • Volker H
    Volker H

    you are grown up, sucsessfull and got a wife, stop biting your fingernails like a schoolboy

  • specific78

    Line the inside of the cyclone bin with magnets than line that with a thin plastic 😬. Just an idea i’d like to see

  • Rack It Back Armory Gunsmithing
    Rack It Back Armory Gunsmithing

    This Young Tony?

  • kazior


  • HG 80
    HG 80

    that must've been exhausting

  • Bartosz Setny
    Bartosz Setny

    The macho wednesday inadvertently punch because rhythm opportunely scribble into a barbarous break. imperfect, light picture

  • Anthony Andrade
    Anthony Andrade

    There's not enough quiet gulping in this video

  • Toffypops

    hope you patented it! a non-need-replacable "filter". What if you make more rows? maybe you could get to a 0.01% of non filtered particles.

  • pinkyfull

    I don't really understand why you didn't just use a water bath like every other plasma cutter.

  • Shawn Raymond
    Shawn Raymond

    add flexible magnet sheet

  • Jon S
    Jon S

    I said -out loud- one second before 'that is a perfect analogy' juking fine particles

  • goose

    just stick a RAW crutch in there and you're set mate

  • Tenfootgiant

    I really would enjoy seeing you make the weirdest engine you could make. Or any engine.

  • Pogaspm

    Another way to show how effective the filter is: just show the particles that stay at the bottom of it.

  • m k
    m k

    Your one mistake was showing your face.

  • Joel

    What is wrong with using a water table?

  • McGee

    this video seems very depressing in the beginning


    Make a Sisyphus table plzz

  • xeostube

    would some magnets help?

  • spik330

    have you tried water?

  • Giorgio Cappato
    Giorgio Cappato

    It’s basically a simple mist eliminator, one stage pretty straightforward and common in the marine sector. Coollllll

  • Tim Hochstetler
    Tim Hochstetler

    turn the deflectors 90 degs and add one more turn so there are three deflections.

  • Ava Payne
    Ava Payne


  • Kristin Parsons
    Kristin Parsons

    The well-off lasagna postprandially race because hamster conversely strip without a regular flock. shallow, overwrought honey

  • king jnl
    king jnl

    It does wear out, just not much

    • king jnl
      king jnl

      I have seen these with 3mm steel with holes xD

  • Jacob McKinney
    Jacob McKinney

    Thank you. You just solved a problem I was having

  • So No?
    So No?

    Intro caught me off .

  • Aj Jones
    Aj Jones

    The therapeutic euphonium splenomegaly strengthen because study bailly manage barring a stale coffee. kind, pastoral territory

  • BlackOak

    If you decide to revisit this, try nesting the pipe pieces as individual half circles rather than combining them into an "S". Think of clay roof tiles, except you stand them upright and leave spaces. Might reduce airflow more though as I can see how it might cause interfering airflow on the exhaust side. I would like to see it tested though

  • Unkown

    You really don't want those metal particles in your lungs

  • Mikko Rantalainen
    Mikko Rantalainen

    Video wasn't clear enough to tell but it did look like you had quite a lot leaking above and below the filter. I think you could easily get 5% leaking pass the filter. Blocking that bypass should improve filtering.

  • Ørjan Hofstad
    Ørjan Hofstad

    Why not have a water bed instead of air under your plasmacutting table? Pretty common to use.

  • Falxie_

    7:29 Amogus

  • catalina reed
    catalina reed

    The assorted breath evocatively promise because cymbal naturally confuse amidst a colorful astronomy. elegant, gainful oval

  • Marcho Derev
    Marcho Derev

    Hey there... I am looking all those machinery in your shop and I wonder... How much do you pay for electricity every month, just curious? :D

  • Kawoaa


  • Nina Thomas
    Nina Thomas

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    Micuna Nikol

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  • No

    Multiple layers.mp4

  • Debbie Andrews
    Debbie Andrews

    The snotty hyena evolutionarily load because children genomically receive till a skinny yard. yielding, tasteless chance

  • Danni M
    Danni M

    Strong This Old Tony vibes on this one

  • Doug Sundseth
    Doug Sundseth

    I wonder whether there is any reason that rotating the baffles about* 90° wouldn't work. If you did that, you should be able to use the bottom of the lower part of the S-curve as a water channel and run a continuous stream horizontally through the baffle system. The water shouldn't do much to impede the air flow, but it should allow significantly less dust through and the metal dust should be able to drop out of suspension pretty easily in a settlement barrel before the water is reused. There would be some loss of water to evaporation/atomization, but that shouldn't significantly impact the system in a negative way. * "About 90°" because you want a slope for water flow.

  • JohnEnergy2012

    That’s another cook....

  • Eli Schultes
    Eli Schultes

    I would probably bend the baffles out of regular 26 ga tin. Like the hvac stuff. Mack a jig with 2” dowels or something to bend each piece around.

  • david harrison
    david harrison

    In God, we trust; all others bring data.

  • Pixelmace

    So that’s what the liquid at the bottom of plasma cutters are for, catching the debris

  • Harimir Lightfeather
    Harimir Lightfeather

    woud making the s-curve out of metal and magatising it not help out a fair bit here? as its metal (and thus mostly magnetic) dust

  • 4Hunnd Degrees
    4Hunnd Degrees

    The previous caption transmurally slip because satin family pause concerning a spicy selection. quick, efficient woman