Circular Saw Kickback Killer (We used science to make tools safer) - Smarter Every Day 209

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  • Xuất bản 17 Th02, 2019
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NHẬN XÉT • 6 196

  • Chad Green
    Chad Green Tháng trước +1548

    Also, #gonadularregion is safe!

    • Photon
      Photon 15 ngày trước

      This is a neat idea! If I may ask, what does the hardware look like on the inside of the saw? Does it somehow transmit the data from the sensors or does it run the algorithm locally? Does this massively increase the price of the saw? Finally, how would you prevent it from learning about jostling during shipping? Does it just wait for power to start, and then stay on for some amount of time after the trigger is let go?
      Sorry, it's a lot of questions. But again this is a really neat example of how ML can be applied to devices we've had for decades. Cool stuff!

    • Shaun Jeffs
      Shaun Jeffs 24 ngày trước +1

      It seemed that the built-in saw brake had a significant delay before the blade actually came to a stop. Those blades can be very dangerous even if not spinning at full speed. I'd be interested to know from your HS data whether the brake is capable of stopping the blade before it reaches flesh. It looked like at 80-100 ms, the blade is already in a position to do some damage if you had and ill-placed finger in the blade path. (And yes, I know folks, you should not have your hand there in the first place, but guess what, people do it anyway, and they pay the rest of their lives for it). This is an interesting approach that is quite different from SawStop. You are attempting to prevent the dangerous contact in the first place as opposed to minimizing the damage once contact does occur. There are also many comments on here about the spring-loaded blade guard. I'd like to see in your video how quickly a guard would respond under a kickback scenario. My guess is it probably won't be able to retract in time, as this is a very quick, chaotic event. Good research though!

    • Prathamesh Lad
      Prathamesh Lad 29 ngày trước

      +The Bean
      Well thanks Bean for the reply.
      I got it.
      To be clear I've never used any type of powered saw in my entire life (hand saw is my favourite one :-) . So didn't know anything.

    • The Bean
      The Bean 29 ngày trước

      +Prathamesh Lad this would make the saw uncontrollable as it would be propulsing itself upwards and over the piece of wood. Sure, no-one is in front, but working with it would be near impossible. Your button idea doesn't seem stupid tough.

    • Prathamesh Lad
      Prathamesh Lad 29 ngày trước

      +Chad Green
      Great Project.
      But my que is
      Why don't you just reverse the rotation (and cutting side) of the blade ?
      So let there be a "kickforward" happen (where there is no operator so might be safe) / (Also change button position on palm side so as soon as the machine launches forward our palm seperates from the button)
      But handle orientation and pressure on the cutting edge ? should be verified.

  • Dave M
    Dave M 19 giờ trước

    I don’t get how a video of an innovation this useful gets any downvotes. I would also love to see something like this extended to somehow work with tablesaws - I’d buy that in a second.

  • 8runner
    8runner 21 giờ trước

    Is Seveneves appropriate for a 10yo that loved The Martian? Love your videos!

  • John Smith
    John Smith Ngày trước

    @smartereveryday Well done my friend!!!
    I could use your help on similar safety features on other tools and designs.

  • Talent Acquisition
    Talent Acquisition 2 ngày trước

    Is it a flight controller in the saw? BTW this video editing is excellent!!!

  • Sociopath Mercenary
    Sociopath Mercenary 2 ngày trước

    I have some personal experience here. I became careless operating a table saw when I was 16 and ran my left hand through the saw. Detached a couple of fingers and generally wrecked my day but the doctors reattached everything with only the loss of a thumb joint. I'm now an IT professional that uses a keyboard everyday so all ended well. I really like your product. 😁

  • Bergen Mai Bolsa.
    Bergen Mai Bolsa. 2 ngày trước

    NICE ,im your fan from VIETNAM.

  • My2CentsWorth1
    My2CentsWorth1 2 ngày trước

    7:37 Share that with Tommy Caldwell.

  • Burton's Attic
    Burton's Attic 3 ngày trước

    I have experienced kickbacks and it is no fun! Don't think any drops of anything came out but flying objects and gonadularregion are really really bad!

  • Liam Sonmor
    Liam Sonmor 4 ngày trước

    Need it... now!!!

  • Gregory Saunders
    Gregory Saunders 4 ngày trước

    So now you need to put the saw on a rail system so it can't kick up, and then calculate the force necessary to run the saw through the wood with out stalling, then load your rockets accordingly.. and you have to do that now because ... you are the rocket scientist 😎

  • Jia Jun
    Jia Jun 4 ngày trước

    lol i really liked the four fingers bit

  • matkir child
    matkir child 4 ngày trước


  • Tim Peterson
    Tim Peterson 5 ngày trước

    ooOOOoooh! training epochs and NNs, how many layers? cool stuff.

  • Maximilian Boost
    Maximilian Boost 5 ngày trước

    You are amazing and your videos are 2 I love the non fake enthusiasm which lets me know that you are really excited about the things you are trying to share with anyone who is interested in science. You are the first one on VNclip I feel the need to tell that you are doing a great job and that I sincerely hope that you will continue this path. Please excuse my grammar and choice of words if I oversaw any mistakes this isn't my mother tongue. Wish you just the best and an awesome day by realising how you are continuing to make my day which isn't the easiest of tasks at the moment.

  • Stephen Balon
    Stephen Balon 5 ngày trước

    This is a very uncommon problem that is exaggerated in the video because.. well obviously, when you take a circ saw attach it to a chain and pin the trigger then turn it sideways in lumber it looks like a disaster waiting to happen. If you operate a circ saw, even one that doesn't have a brake, with a rather dopey level of experience it's nothing like what's being displayed. This is one of those things where, yes, granted the invention works but the problem it's solving isn't a problem that is plaguing trades people. More people in the trades are being injured gradually over time by wearing out their bodies. If you want something that sells immediately make the saw lighter, cut faster/smoother, or more ergonomic. Those are the things trades people are asking for and that's also what they put their money towards.

  • Brian Hill
    Brian Hill 6 ngày trước

    This is amazing!

  • adnane Lebouiha
    adnane Lebouiha 6 ngày trước

    you guys are awsome !

  • Paul Bumgarner
    Paul Bumgarner 6 ngày trước

    Let me know if you want/need investors.

  • Travis Brantner
    Travis Brantner 7 ngày trước

    Get ahold of me anyway you feel you can I am very interested in mabey getting in on a part of this

  • Brad ley
    Brad ley 8 ngày trước

    Ill buy one from yall

  • Smile Space
    Smile Space 8 ngày trước

    Seveneves is a fantastic book! I read it back in 2015 when it first released. It was really good!

  • paraiks
    paraiks 9 ngày trước

    Just use the DualSaw

  • Mary Jane
    Mary Jane 10 ngày trước

    That's sawsome!!

  • DailyOoopsies
    DailyOoopsies 11 ngày trước +1

    Just leave the abbreviation as 'MadSKLS' (Mad Skills)

  • thr0ttl3j0ck3y
    thr0ttl3j0ck3y 11 ngày trước

    I just had an idea looking at your thumbnail, how about we try an orbital circular saw? It'd be a beautiful disaster!

  • Paul-Joseph de Werk
    Paul-Joseph de Werk 12 ngày trước

    Two microswitches can can do the same work as the "complex sensor" to hit the brake. Also the bowing and binding usually occurs when, you have two sides supports and you are cutting across . You should never support both sides when cutting across. Your demo produced kickback only because the saw was loose and had no one pressing it into the wood, not because the wood bowed inward, since you weren't cutting across between the supports. Just an observation.

  • Ian Ide
    Ian Ide 12 ngày trước +1

    Trouble CUTTING with a saw? This one TRICK saves your manhood!!
    The only time I've actually seen kickback was improper use of the saw. Not everyone should use power tools and this should be stressed more than saving people from themselves. The idiot that destroys his nuts with a circular saw wont give birth to more idiots....

    • kperry5000
      kperry5000 10 ngày trước

      I don't think that's a good way to look at things. People make mistakes when learning. Heck even professionals can make mistakes. Nobody's born with the innate ability to understand how to use a power saw. People should be able to learn from their mistakes without getting seriously injured

  • PK B
    PK B 13 ngày trước

    Wouldn't it be easier to put a button on the flat part of the saw and in the front. The button would protrude below the flat metal and it would have to be pressed in order for the saw to work. Meaning the flat part of the saw is on the wood. So when it kicks back and comes off the wood the button would extend, open the circuit, and kill the motor.

  • Abhishek Khuntia
    Abhishek Khuntia 13 ngày trước

    This video was outstanding man, I salute you for making this kind of innovative videos. We also need more on the same..

  • beachfiredude
    beachfiredude 14 ngày trước

    Right on thanks for sharing
    A Carpenters problem

  • M. Kharis
    M. Kharis 14 ngày trước

    that MADsomething is great

  • Zyrppa
    Zyrppa 14 ngày trước +1

    if i didn't understand things wrong, but wouldn't it be better if the blade spins to otherway?

    • Kytrix
      Kytrix 11 ngày trước

      Yes in Europe the blade turns backwards and no kickbacks.....

  • Andre Fi
    Andre Fi 14 ngày trước

    Hey, where did you get the data from?

  • Kyle Christian
    Kyle Christian 15 ngày trước +1

    Destin, this was an awesome video! I’ve been woodworking a long time and love this idea. One tool is like to see this applied to is a table saw. Keep doing tool videos 👍

    • Kyle Christian
      Kyle Christian 11 ngày trước

      Michami we had a SawStop at my high school and my neighbor has one. What I like about the brake used in this video is it isn’t damaging. When you stop a SawStop you have to replace the cartridge before you can use it again. If that could be replaced with what’s done here that would be a money saver for the consumer (the manufacturer probably wouldn’t want it that way though).

    • Michami
      Michami 12 ngày trước

      They have a device on some table saws that have an induction sensor, so that when a had touches the blade, it's stopped instantly with an aluminum brake. I've seen tests using a hot dog, and not a single scratch on it.
      Honestly though, I didn't know this was a problem with circular saws. I've been using them for decades and never had a problem with kickback. But I'm always extra careful, use all the proper supports, and replace blades before they get dull. Not sure if that's why, or something else.

  • zztop3000
    zztop3000 16 ngày trước +1

    I do't get it , kickback? You just hold the chainsaw better, that's it! This is stu*id

    • don trump
      don trump 16 ngày trước +1

      zztop3000 this is meant for urbanites who will never use a tool in their life and thus cant see the flaws of the hypothesis

  • Bijan Izadi
    Bijan Izadi 17 ngày trước +1

    Danger Radius

  • Hangfire-13
    Hangfire-13 17 ngày trước +1

    *Doesn't a spring loaded blade shield serve the same purpose at a much lower price point?*

  • Ben Meyer
    Ben Meyer 18 ngày trước +1

    Just put a switch on the base plate. Brake goes on when the switch does not detect the wood. Motor wont even start if the trigger is locked in when power is applied. No patent required, just common sense?

  • Linkyboy
    Linkyboy 18 ngày trước

    I don't use saws, I don't make saws, but this is cool and I want it

  • gsxrjeff
    gsxrjeff 19 ngày trước

    just reverse saw rotation

  • Prince Westerburg
    Prince Westerburg 19 ngày trước +2

    Someone else made a plastic fin that stops the wood grabbing the blade. If its that or a computer, what are manufacturers going to choose?

    • don trump
      don trump 16 ngày trước +1

      Prince Westerburg exactly. Plus in the example theres a chain substituting your arm.
      A chain has no push capabilities, only pull. Your arm on the other hand is already making a decent amount of force PUSHING the saw forward

  • John Farrell
    John Farrell 19 ngày trước

    Nice job guys. I don't know if anyone actually reads comments so I'll keep this low effort, but if you would like some feedback from an actual 20+ year carpenter let me know. It would be along the lines of: In my experience your scenario is not what actually causes kickback on a real job, though your solution would work in the real job scenarios. The problem you are solving we would call binding. This is easy to over power with a good arm, and plywood does not do this, per your on screen discussion. There are already good solution in effect in chainsaws and table saws. Your approach may be better for hand held saws. Side fact: you were saying humans can't react fast enough to let go of the saw in an emergency. True. But there is an other thing going on. There is something in your brain stem that will not let you let go when the sh$# hits the fan. This is much more of an issue with big, industrial hammer drills. When those things catch and start to spin they will tear your shoulders apart and you can't let go. I always though of this as baby monkey holding moms fur in the trees reaction. It is a real thing. You learn to hold the drill in a way that doesn't use your thumbs so you don't have the strength to hold it if it starts to spin, so you let go thru weakness and save your shoulders and elbows. There's more if you are interested. Good luck with the idea.

  • jay gareth
    jay gareth 19 ngày trước

    And I thought a paper cut was scary, who knew there was such a thing as CSK.

  • NGneer
    NGneer 19 ngày trước

    Audible keeps putting seveneves in my suggested books. I’ve avoided it simply because I keep seeing it suggested by people I don’t have much respect for. You changed my mind on it. I’ll probably download it tomorrow. Thanks for that. I’m always on the search for a good sci-fi novel. I read around 60 or so last year with audible. I’m running out of good options now though.

  • Speedy Chicken
    Speedy Chicken 19 ngày trước

    But no one is putting pressur foward is ut wiuld be more time

  • Peedlebum
    Peedlebum 20 ngày trước


  • jarrod Alexander
    jarrod Alexander 20 ngày trước

    Can anybody else hearing nothing but the pop pop pop in the background song??

  • Davis Tuck
    Davis Tuck 20 ngày trước

    This also needs to be in stuff like cordless drills. Because sometimes that thing twists around and freakin snaps your elbiw

  • bowow59
    bowow59 20 ngày trước

    Fake, the saw don't come to you it goes away

  • yo boi
    yo boi 21 ngày trước

    Isnt the same thing with a gas chainsaw

  • jtan163
    jtan163 21 ngày trước

    Really curious to know about the sensor you’re using. I fly racing quads and we find that constant vibration an crashing causes our gyros to degrade over time ( they’re designed for cell phones) and we have to replace some of our flight controllers on occasional as they just don’t work after a while.

  • Stephen Hodge
    Stephen Hodge 21 ngày trước

    Hey Dustin, I bought "Seveneves", and am really enjoying it!!!!!

  • Polite Cat
    Polite Cat 22 ngày trước

    if it falsely trips even 5% of the time, it will get deactivated. its gotta work like 99%+ of the time.

  • Paul Debaecker
    Paul Debaecker 22 ngày trước

    I don't know if it is for legal reasons or what, but the circular saw I use runs in the opposite direction (teeth going upwards into the wood). Woudl this system be necessary and would it work?

  • Antonio Renteria
    Antonio Renteria 22 ngày trước

    good stuff

  • Georgy Padalko
    Georgy Padalko 22 ngày trước

    Cool, modern BOSCH drills have kinda the same thing, they stop and "apply breaks" if a bit jams.
    Awesome job guys, the more manufacturers have it, the better world will be!

  • 01Versatran
    01Versatran 22 ngày trước

    Isn't a neural network overkill here?

  • Ciprian David
    Ciprian David 22 ngày trước

    just curious... why is this having 1.6k dislike? I mean that mechanism is really awesome

    • Ciprian David
      Ciprian David 21 ngày trước

      +ensen89 agree but is not about a saw with a riving knife. this is not about how to avoid a problem but how to solve it

    • ensen89
      ensen89 21 ngày trước

      Maybe because you could just use a saw with a riving knife and don't have the problem? ^^

  • JronmanBuilds
    JronmanBuilds 22 ngày trước

    hopefully SawStop don't sue you guys because this tech is awesome and needed in every saw.

  • Son Nguyen
    Son Nguyen 22 ngày trước

    You guys are freakin so smart. I appreciate the content.

  • Dennis Sorensen
    Dennis Sorensen 23 ngày trước

    It should be on ANGLE GRINDERS!!! With a seriously fast acting brake.

  • tsartomato
    tsartomato 23 ngày trước

    listening WHILE DRIVING???

  • Caleb Gardner
    Caleb Gardner 23 ngày trước

    Isaiah 10:15 (SED Translation)
    Shall the ax boast itself against him who chops with it?
    Or shall the *MADSSKMLDBM circular* saw exalt itself against the *Destin* who saws with it?
    As if a rod could wield itself against those who lift it up,
    Or as if a staff could lift up, as if it were not wood!

  • Caleb Gardner
    Caleb Gardner 23 ngày trước

    Verse from the end:
    Shall the ax boast itself against him who chops with it?
    Or shall the saw exalt itself against him who saws with it?
    As if a rod could wield itself against those who lift it up,
    Or as if a staff could lift up, as if it were not wood!
    Isaiah 10:15

  • Daniel Voyles
    Daniel Voyles 23 ngày trước +2

    At first glance at 8:00, I thought that was blood on the ceiling from failed attempts.

  • Travis Romine
    Travis Romine 23 ngày trước

    Hi Destin, I work for the company that manufactures Milwaukee power tools along with rigid and Ryobi. i have sent this link to my district manager and he said that he would pass it along to the quality assurance representative for Milwaukee. I hope they contact you and get this ball moving.

  • Pavel Paul
    Pavel Paul 23 ngày trước

    8:00 the ceiling makes me suspicious. How many volunteers and aliens you've used until the software worked?

  • Adam Wilson
    Adam Wilson 23 ngày trước +2

    This is what riving knives are used for. This stops the timber from pinching on the blade

  • TotallyOriginal
    TotallyOriginal 23 ngày trước +1

    Of course his name is Chad.

    • stocchinet
      stocchinet 16 ngày trước +1

      the virgin kickback sawblade VS the chad programmer

  • Stefan Tieber
    Stefan Tieber 23 ngày trước

    Why not just use a saw, with the blade spinning in the other direction?

  • darkavenger10k
    darkavenger10k 23 ngày trước

    If you don't have the strength to stall the saw you are using before it kicks back then you shouldn't be using the saw.

  • Kevin Smith
    Kevin Smith 23 ngày trước

    It's a good idea but any company that adds it will also add an extra $200 to the price and no one will want to buy it because of the price.

  • NateLovesToTank
    NateLovesToTank 23 ngày trước

    You’ve also got me convinced to click the bell, what are you going to try and convince me to do next?

  • NateLovesToTank
    NateLovesToTank 23 ngày trước


  • hj labs
    hj labs 23 ngày trước

    I didn't get smarter today ... LOL...

  • McKevin Dauntless
    McKevin Dauntless 23 ngày trước

    Circular saw is safe if the person who is using the saw is not dumb enough not to hold the saw properly. I've been using a circular saw for a long time since then i don't have any problem wiit.

  • Robinson Hogan
    Robinson Hogan 24 ngày trước

    I made Fusion Power work. So I invented it.

  • Ромарио МкЛеод
    Ромарио МкЛеод 24 ngày trước

    Dustin, Chad. Nice to see y'all!

  • MotoMania
    MotoMania 24 ngày trước

    Hilti got a similar thing. i think atleast. In my old work as a steel worker i used Hiltis circular saws and when cutting things it would kickback but stop right away.

  • Trey Cranson
    Trey Cranson 24 ngày trước

    who would thumbs down this video??? saw makers? trolls?

  • joe cormack
    joe cormack 24 ngày trước

    he made that incredibly complicated, all he had to do was make it so it would shut off after a jerk movement, you don’t make any sudden movements when making a cut

  • _V_I_V_I_D_F_O_X_ —3–
    _V_I_V_I_D_F_O_X_ —3– 24 ngày trước

    Just imagine how the wood feels

  • Dennis Wetzler
    Dennis Wetzler 24 ngày trước

    I like your ambition and using your engineering knowledge to over engineer cool stuff. But if the kickback is caused by the cut section of the wood clamping on the blade, Couldnt that be solved by adding say a blade width like stub protruding from the deck to prevent the wood from pinching the blade? My table saw has spmething like this behind the blade to keep the cut straight and prevent pinching of the blade.

  • Laimis B
    Laimis B 24 ngày trước

    07:59 top left ceiling... where did you hide the body?

  • Fsac
    Fsac 24 ngày trước

    +1 for Seveneves. Picked it up on a whim just to use my last credit on Audible, and it turned out to be one of the more enjoyable books I've listened to through their service. So much so that the very first thing I did upon resubscribing was to pick up another Stephenson book.

  • Marc LeBlanc
    Marc LeBlanc 24 ngày trước

    Of all the tools in my shop, the one that really scares me when I use it is my circular saw. You guys are on to something. Good luck moving forward. I hope to see this in a future saw.

  • Christoph Fischer
    Christoph Fischer 24 ngày trước

    This is super cool. It protects people from severe injuries.
    Or you could just wedge a little spacer in the gap.

  • Jonathan Kiser
    Jonathan Kiser 24 ngày trước

    Gonadular region 😭😂😂

  • Safir
    Safir 24 ngày trước +2

    Big bandage is gonna censor this

  • Z M
    Z M 24 ngày trước

    This will save lives. Great work!

  • Michael Kane
    Michael Kane 24 ngày trước

    It's really sad to see the number of negative comments toward this in the comments here. Safety devices are like any PPE. They don't take the responsibility for safety away from the user, but they can make tools dramatically safer to use. I'm not in the market for a circular saw right now, but if one comes out with this technology I will buy it TOMORROW. This has been forwarded to Milwaukee, the power tool company I use.

  • TheScooted
    TheScooted 24 ngày trước

    Guys - just attach some kind of a button on the saw which will turn it on when a saw touches the wood. When a saw kicks back - the button depresses. No need for human reaction or fancy technologies at all! I mean - why invent a pen that can write in space? Just take a pencil ))

  • Yotam S
    Yotam S 24 ngày trước

    Cute cat :)

  • Ricky Horsburgh
    Ricky Horsburgh 24 ngày trước

    I like the concept but i think it should be optional to have on or off in certain uses by professionals kick back is expected and grip pressure is increased but it still needs to be cut this would render the saw useless in those circumstances if it cant be overridden. Great for new users or homeowner's and a good back up for pros just needs an override incase

  • Philip Sparrow
    Philip Sparrow 24 ngày trước

    I think this is most relevant to chain saws, great idea but applied to the wrong device. keep it up guys. kick back kills.

  • JAMES! Since the 70's
    JAMES! Since the 70's 24 ngày trước

    We would need a huge Von Braun space station, or a few of them!

  • Brew Bear Brewer
    Brew Bear Brewer 24 ngày trước

    So cool

  • K0ester
    K0ester 24 ngày trước

    Worst kick back I've had was on a table saw. Piece of 1x6 kicked back and hit my shoulder. Went through a work jacket, sweatshirt and a t shirt, and gave me a good puncture would with the corner.

  • Michael Sliva
    Michael Sliva 24 ngày trước

    Shouldn’t the cut be behind the saw on the handle side and they push it into the wood to simulate someone cutting away from themselves? Especially since it’s doing machine learning on a motion opposite of typical use.