Angle grinder explodes in slow motion
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- เผยแพร่เมื่อ 9 มี.ค. 2020
- 😍😍😍 Kinetic Driver: kinetic-driver.backerkit.com/...
Experiment Angle grinder explodes in slow motion and gives us some insights regarding what actually happens when it fails.
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*After having one of these things explode to me before... it is scary and I will ALWAYS keep the guard on... ALWAYS!*
How do you prevent something like that?
@@assassinaria you dont…
Sadly the guard doesn't fit everywhere when you are doing maintenace in the field for example. I have broken ("exloded") a huge amount of blades but never gotten injured. Positioning in relation to the blade is also beneficial.
Did someone know: the disks have a expire date ? Its normaly marked on the middle ring
So you make a video about how dangerous an exploding disk can be, but the guy testing it doesn't even wear safety glasses?
lol the disc is only ZERBRÖSELING (englifiscated german word)
@@mrjodoe Love it
And the cutting angles are wrong. If they want debris to shoot toward the styrofoam cups, they need to stab the pipe on the right side of the disc and from the other side of the table since the spin is counter-clockwise. (or flip the grinder over like you normally use an angle grinder). They did not think about centrifugal force. The guy ducking under the table is actually in the unsafe zone. This kind of shows how safe angle grinders are if the guard, stock, and operator are in the correct position. It also shows that most people and youtubers do not know about physics. Angle grinders are basically mini bombs. Good video though and slow-motion camera.
yeah, that guy should have been wearing a face shield as well. super dangerous. shrapnel aint no joke
Im over here yelling at the screen "WHERE'S THAT EYE PRO"
The fact the closest guy had no eye or face protection for all but the last test is fucking crazy.
The lack of basic knowledge is glaring.
This is Lord of the flies in a workshop.
@@nomadicgrenada I don't get how the lord of the flies reference checks out
@@stsk7 I don't get how you don't get it?. A group of boys on a deserted island and the disastrous attempt to self govern.....
@@nomadicgrenada that sounds like a description of Seattle but not this video
Thanks for posting this. I was the safety rep for the metal smith and machine shop on my ship in the Navy. I didn’t want to scare the new people, but always tried to instill a healthy level of respect into the new guys when it came to tools like the grinder. In all of the years I’ve been doing this stuff, I’ve never actually seen one explode. Any injuries I had seen in person were from a result of kick back or people touching the blade because the guard was removed. It would be interesting to see a test where a cutting disc was plunged into a non ferrous metal to see it it would gum up and explode like the wheels on a bench grinder.
They explode much easier when you go past the expiry date, the expiry date is printed on the disc. Especially cutting disks, I tried to use some that were 2 years past expiration date and most of them blew up as soon as you touched something. I was wearing full safety gear but it was still scary seeing the discs go shooting out.
I have broken many, many blades and never gotten injured. Most with the guard on and many without (it prevents cutting in some tighter situations). Probably done thousands of cuts over the years and probably broken like a 100 blades. 🤷
I have broken Tons of em before and never got hurt by one breaking, but on the other hand, I have cut nerves clean in half in a few fingers with Cutoff discs but yesterday I guess my straw got pulled cause I was just making a little notch into a ln intake manifold and KAABOOOOOOOOOOOOM and it felt like someone had smacked me in the face and I knew immediately what had happened disc filleted off a nice chunk off the side of my face. Perfect shape of the half of the disc. Got lucky, an inch to the right, stuck in my face, 3 inches lower, taken out my jugular
Interestingly,
I now feel safer with my grinder than I did prior to this vid
Totally! I've had several catches over the years with 4.5" & 7" grinders. Happens fast and surprises me every time, but never had it cause injury. I only have a guard on my 7", none of my 4.5" grinders have guards. They were ALWAYS in the way. Got tired of constantly adjusting and turning, interrupting work flow...eventually chucked them. Live and let live, do you feel comfortable with.
"Why you ask?" "Because of reasons."
Anyone else yell, "Because I Can!" at the screen? No? Just me?
I think I'm going to go build that suit of armor now for the next time I use my angle grinder.
Can I choose Option 2 for tomorrow's video?
Figments Made that’s what I was thinking as well 🤣🤣
Yep, I did.
I’ll bet if you were using cheaper disks in your test more damage would have occurred.. Glad the guy under the table finally put a shield on.
I was secretly rooting for a new Darwin award winner personally
Thanks for doing this, always more impactful to watch a thing happen
Dude, don't die soon! Keep making such nice vids. Really enjoy the entertainment as a whole!!!!
Glad you are safe. Love your blog!
all i saw was gru and his minions! :o) i love it!
In automotive we use cutting pneumatic cutting disc when one goes you have a whole new respect for the tools you use. Awesome video to keep us safe. Take Care
I like your random ramblings thank you
Just three days ago I worked with an angle grinder, and one spark shot underneath my safety glasses into my eye.
The doctor picked up the grain with a Q tip, and I don't have any dangerous eye injury.
It's the first time something came into my eye working with power tools and I'm glad, it just was a minor incident.
Wear your safety glasses, kids!
I caught a rebound "something" in the eye the other day, my usual technique is to wear a face shield and safety glasses (which is annoying as I wear a respirator and earmuffs too most of the time) but I think I was just wearing glasses this time, finally bought some goggles that seal against your face, they are great!
Glasses are not enough! You should wear safety helmet with protective face shield.
I've had a tiny (only looked like a dot with bare eye) metal shaving drilled out of my eye. That was fun. 👀
You have proven how safe angle grinders actually are.
Had a disc explode today. Nothing happened except dust everywhere. Of course had the guard on and safety glasses and gloves.
I Think he's proven how critical it is to use them safely. Taking a gouge like that out of a cup with almost zero mass to push back means it will do serious damage to your body. That's the opposite of safe.
But really they are not safe. Trust me. Im on number 150-160 fibre splinters that ive pulled from the inside of my eyelids. And most are under the skin. Enough to lose your mind with the irritations on the cornea. The pieces hit face and went up under my safety glasses and into my eyes. But thats only half the horror story
@@thebeastfromthesoutheast7765 Bruh... whats the other half?
Also, how much have you used the grinder?
@@rockfeli the other half is dealing with corrupt doctors who have been calling my injury an allergy problem to acc so i dont recieve compensation. Yes i have used angle grinders since i was a teenager
Valid advice there and some interesting footage! Can't be too careful with the angle grinder. For any not in the know, it's worth saying that there is a use-by date on the wheels (usually printed/stamped on the metal collar in the middle of the disc). Once past, it's a good idea to just snap the disc and put it in the bin. hth.
Way cool Giaco - thanks for making and sharing!!
Dont' know if I'm more excited about the video or the teaser to the next video 😍😍...it's good to spread awareness about that, I had disks explode too, it's scary. On a side note: these slow motions are the sh**t, well done.. 👏👏
Enjoying your channel! Have been hooked since the DiResta video. Hope to meet you next time through the states. 👍🏼
And people ask why I keep a guard on my grinder
Your shops needs some portable plexiglass shields. Mythbusters shows how useful they are for protection.
Next episode is going to be a masterclass video 😂 that orchestral music
the beauty of the guard is that you can clamp a piece of angle iron to the work bench , this allows hanging the grinder on the vertical angle edge while the blade is still spinning. You can quickly put the grinder down without waiting for it to spin down. Use multiple cheap grinders vs one good one and keep different discs on each. Bonus...zip tie a sharpie cap upside down to the angle...allows quick one-handed use of your sharpie without it drying out.
LMAO @ "Why you ask, Oh you didn't..."
Mans just has a casual forklift in his garage
I'm curious what a disc would do if it was soaked in water for a while then just turned on?
Good info! Be careful and thanks for sharing!
Thanks for remembering to this basic safety thing... just googleing "Angle Grinder Accident" showed me that I have to be more safe grinding next time even If never happend something but in hope that it never will... Thanks
Call me wuss but I don't like sparks debris flying in my face so I always keep the guard on. Got to protect the money maker you know?
Yeah same here they dont hurt but they are bothersome
Exactly, it's convenient to not have sparks flying onto me.
Great video!!
I was on a job one time the superintendent was cutting out a door in metal studs and hit a screw a shattered the blade. I heard "FUCK! I cut my goddamn finger off!" Look round the corner and theres blood everywhere. Ever since then I dont use an angle grinder without the guard. EVER.
Yes, plz do more of theese videos
This is why my wife says we can't hang out in your shop.
Wait till you see today’s vid 🤦🏻♂️
@@GiacoWhatever oh snap, are you speaking to me from the great beyond? Are you like the ghost of Giaco now? Oh dude, say it isn't so! Cuz it would be way weird to be talking to a ghost on the internet, I'm just saying that would be weird.
Seems to me that due to the rotation, the fragments are more likely to shoot back towards you as you are holding the tool, rather than out away from it. In any case, interesting (if not dangerous) experiments. Thanks for sharing! 🐐
Valuable video to watch. Grinding is dangerous. Mahalo for sharing! : )
"If you don't remember what you ate for lunch, Google "Angle Grinder Accident" and you'll see it again." Hahaha
30 years of use and never a problem until last year a disc exploded when i had no gloves on and made a mess of my hand severing tendons etc and needed surgery. Take these little guys serious!
Yeah.... I've used an angle grinder a lot... Exploding discs don't scare me, wear a pair of safety glasses and you're okay, you'll at worst get a few scratches if it flies in the wrong direction and the guard is more likely to cause you to bust a disc because it obscures your view of the work and how you're hitting it. *"You're not using it properly if it blocks your view"* the trolls will say. Sir troll, I retort, you have never used an angle grinder on anything but a horizontal surface sitting on a table. Get over it.
Super thick wire wheels scare me. Wire cups terrify me. I have scars from knotted wire cups that still hurt. I've had days where I had to spend 15 minutes in front of a mirror sorting through my beard to find wires from wheels that were embedded in my skin like little spears. I've had knotted cups grab 5lb pieces of steel and snatch them out from under a set of TIGHT clamps and chuck it at co-workers across the shop.
Disc guards do nothing to prevent any of that. They just make it happen more often.
Edit: Oh, and loose T-shirts. Loose T-shirts have almost gotten me gutted. More than once I'm ashamed to say.
Glad you took this stance! I've had several catches. Surprising always, but never cause injury, even with bigger 7 inch grinder. Face shield yes, grinder guards no...not in the real world on your back, laying sideways, etc. They're always in the way. Video clearly shows how even flimsy styrofoam cups aren't damaged. Get over the worry wart "could be/almost/what if" and get to work already ;-)
Here in Australia on building site etc a number of people have been killed by thin cut of wheels exploding without the shield on. Partly it is the speed these discs are designed for and being used at on the bigger angle grinders ie; the 8-9 inch grinders. Always without the safety guard on. Other severe injuries have occurred also.
I'm very very hesitant to use large ones without a guard because they are not very easily controlled. Small grinders can be very well used with one hand and you can almost always keep distance and position yourself away from the line of the blade, and I've had coutless of small blades break (some "exploding" too) but never had any injuries because of it. In the field there are situations where the guard prevents the machine from fittin and your only option is to cut without it.
Nice video and good point.
I think if you had stressed the disks on the other side (sparks flying away from the grinder vs toward it) the centrifugal force would have carried pieces out, instead of into the guard. Normally one uses the grinder that way, anyway. Super dangerous stuff.
Grazie, stay safe, and ciao!
The bar you were using was taking a lot of energy out of the break
Yes! Normally you’re cutting stuff...
first time i used one of these things i was terrified cuz i have seen some accidents.. after using it a few times and got more comfortable i am still careful but not that scared. i just wonder how much inaccurate use you need to use before it breaks.. or injures you..
In a troll voice « but backyard scientist already made such a video and blablabla » 😂
I see, it’s life risking
99% of the time it’s user error that causes a disk to explode or fly off. Just like your first break, you are putting a “moment load” on that disk which it was never meant to handle. Use good quality discs with no defects and use them how they were intended to be used and 99.9% of the time you’ll be just fine. Also, I run an ASME pressure vessel fab shop, probably at least 25 grinders laying around and not one of them has a guard on them.
Wow really cool to see that in super slowmo, and apparently the Italian made styrofoam cups are > American cups.
Cool test, don't die testing. 7:30 is similar to what happened to me about 25 years ago. I was cutting the floor pan out of a car to replace it using a die grinder at tight points. The cut wasn't finishing yet but the metal moved from the stress relief. The die grinder wheel caught the pinch and came to a sudden stop. A tiny piece of the wheel ricocheted off of something and grazed my cheek on it's way to my left eye under the safety glasses. Rushed to the eye doctor who removed it using a giant magnifier and a needle. It hurt for about a week but I fully recovered. Even when you doing the right thing sometimes you still get hurt.
Lucky
The things people do when in quarantine.
I'm amazed at how relatively safely disks break.
I got given a grinder without guard and popped a couple of disks, was lucky cos I had gloves and goggles. Now I got a new guard on and also learned how to properly cut different metal shapes
Tbh the scariest part of a cut off wheel is when it kicks off of something.(happened more when I was learning how to use them properly)
Well, I had an accident at work today. Apparently all of our grinders don’t have guards already attached to them, even tho our company standards clearly say never use one without a guard… Anyway, it exploded in my hand today and banged my finger up pretty bad and bounced off my face shield. Thankfully I was wearing gloves and was wearing the shield, I should’ve found the guard for it. 😅
Why is that every time someone says don't try this at home, I want to do just that?
And thanks for the video.
Most of the terrible injuries you see are from the abrasives loading up when you are grinding soft metals such as brass or aluminum. They load up with metal and basically explode.
8:52 EIGHT FIFTY TWO GODDAMMIT
That face shield is doing JACK SHIT for the top of his head that is conveniently RIGHT IN THE PATH OF DESTRUCTION.
Yea the guard was there protecting them n then they took that off even and man... Not safe there.
The way that guard stood makes me think the importance of proper handling of this equipment , safety is a choice of life or death
I truly expected more damage. . 👍👍👍👍 seen more damage as well, fortunately not on me
Many thanks for the video. My opinion: Important to know, that most accident will happen with angle grinder in the hands, not grinder clamped/fixed to a table. So it could be instructive to know what forces awaken in the process.
Now this is the way safety videos should be made! Glad the sheep was ok
The cups are not marked or destroyed simply because they give way to the broken disc and fly with it. If it had been a very stable and heavy object or a person (or animal) the broken pieces would simply have cut its way through the object or body.
The dis is not very large so the torque is quite low but the speed of the disc would have had enough force to permanently Injure someone.
I have only had Dremel blades explode and those are usually aimed at your face. So I always keep my face safe.
Those are actually specifically designed to aim at your eyes!
@@GiacoWhatever And crotch!
Just had a thin disc explode yesterday and stick in my knuckle. Made me frightened to use the blood thing now
Haha. This was worth the price of admission. That’s scary as heck. Happened to my buddy Doug. Something like 40 stitches in his face.
ciao giaco, thanks for the message safety guard on, safety glasses and face shield. one thing i have to say is that the beast is very very different when you´re talking 7 and 9 inch grinders. i´m a metal fabricator and can´t tell how many times i´ve seen accidents with the grinder. and how many close calls i had for being just stupid, tired or a combination. eye doc has removed three times things of my eyes and nothing nothing nothing is worth the risk of losing eyesight. of course there is the unlucky one or the lucky one that defies stats. thanks again this is really important. take care. piero
Outstanding- this is why you have a large team of guys. Cannon (grinder) - fodder ;)
He put a face shield on but only when they took off the guard
this guy doesn't look like he uses angle grinders
Try it with only one of the two metal things holding the grinder to the table, or without any
1:59 that made my heart jump
Awesome video! Just goes to show how dangerous these things can be if used improperly, lots of people get hurt because they don’t understand these things can explode like that and seriously injure you or others around, also extremely ballsy sitting there making these wheels explode and not wearing any sort of PPE, come on man 😂😂😂 atleast wear some saftey glasses lol
what is you have a too high rpm? maybe you can use a hand router fot the high rpm...
The grinding discs I’ve seen range from 1/4” to 3/8” and at 10 thousand RPM, things can (and will) happen...scary things.
*ALWAYS* check the maximum RPM rating for each disc you use. If you don’t, it could cost you your life.
Good . Dengers with angl grinder ins not only in this cession also if get lose or jammed in materials would be an upcoming disaster to your self.
How college drop out test styrofoam cups
I been using angle grinder cutting 100pc of hardened 6mm rod. I haven't had exploded disc . There's a technique how you lay the grinder wheel on stock, let it bite and don't push to hard let it cut it course.. even then I always use face shield regardless.
Lol no eye protection on the guy closest to the grinder
And that's why I use a hack saw
YOU HAVE A GRINDING DISK GUARD ON A CUTTING DISK
Tu hai idee brillanti e hai un gran bel canale e sei un esempio da seguire visto quello che hai creato in poco tempo giovane come sei ma da italiano a italiano....il disco è montato rovescio,i dischi da taglio o da smeriglio o comunque i dischi ad impasto vanno sempre montati con il logo (le scritte) verso l’interno praticamente verso il corpo macchina mentre i dischi con widia il logo va all’incontrario cioè verso l’esterno in pratica come hai montato questi
Non cambia assolutamente nulla in un disco piano così sottile. Comunque era soprattutto per farlo vedere meglio in camera ...
Grazie 🙏🏻
Giaco Whatever mi spiace contraddirti anche perché è già un’orgoglio che mi hai risposto ma sono proprio le case produttrici a dire di usarlo così ☺️
My brother in law had a 12 inch stone cuttingdisk split in two pieces cut through his t-shirt and cut a giant gash across his stumach...But also..the types of disks you used seem much different like the ones i have seen failed before...give the "dollar store" ones a try..
5:00 peek a boo I see (for now)
But really where are his goggles and muffs? The blades still spinning and everything
I,love this kontain
_"Always uses discs that are high quality."_ My good man, high quality and Made in China are not two things that are mutually compatible.
Thanks for doing the video 👍 and I really must get a good quality full face shield for when I use my angle grinder and the 1.5mm thick discs that I use.
I always use the grinder without the guard
Of you use a cracked disc or a disc that is a bit broken they have a high risk of exploding or throw big chunks. Have happened to me many times.
Does the hand guard prevent the chunks from hitting you?
The test showed clearly that the danger doesnt arise when yor disc breaks on something. It is far more dangerous when it disintegrates on its own.
Two important rules 1. Always have the guard fitted. 2. Always wear safety equipment made from styrofoam.
I hope you guys are OKAY as far as the virus goes. Stay safe.
Most people I know take that safety shield off. Should have tested it exploding in the direction of the user
2:01 my heart jumped out of my chest
I think a lot of the really serious injuries are due to kickback, where the guard plays a big part, but clearly catching shrapnel in the eye or arms could be catastrophic too. Has anyone ever had a flapdisk explode?
Graphic so read on your own caution
Yes, it happend to me and around me, my boss warned us when we started out that no matter what to never remove the guard cover so we just follow this simple rule, 3 weeks later while working with the angle grinder the disc just exploded on me, simple work done it hundred times that day but that one just didnt want to anymore it skimmed my left pinky a bit thanks to my gloves it didnt do much and thanks to the safety goggles my eyes where protected aswell since some little shrapnel just flew everywhere but i can tell you without that guard id have some serious problems.
The second time didnt happen to our crew but to another working on the same jobsite, they never used a guard and they didnt want one either, since we all went for lunch break together i asked them to put it back on but since i was 21 at that point and most of them where 30-40-50 ish they just kindly told me to F off... and i kindly let them be, 2 days later 30minutes before shift ends we hear an soul shattering scream followed by call an ambulance, they where cutting a bit of stone and the disc (not a flapdisc but a diamond cutting disc) lodged it self in to a cravis and shattered the disc in multiple pieces, ripping his left index and middle off and leaving his ring finger dangling of his hand just attached by a piece of skin, besides that i heard he a had a piece stuck in his thigh and foot and that he was lucky that his head was not in the flight path....
so yeahh no matter what disc never ever remove the guard cover! if you can not reach there to cut use a different tool!
@Gopnik57 that is a crazy story, glad I read it. I once unsuccessfully tried to cut the bars of a steel security door with a grinder, not knowing a thing about the danger or the fact that the disc was bought used and was old. Scary stuff.
I was cutting rebar in construction and the safety guard was off of the grinder because it gets in the freaking way anyways the disc blew up and I caught it in the shoulder. Always wear eye protection with these things
And keep your head out of the plane that the disc is spinning on
Well I came to this video after Urchlab in his video "4 different ways to wield box section corners" claimed to never use protection on angle grinder.
Had an angle grinder blade explode on me with a guard on when I was cutting I/H beam. Went through my pants and sliced my leg in two places, I still have the scars.
You should watch the video of Beyond Press Channel. They try above the Max R.P.M to cutting disk & they have Slow motion video.
Goat
Haha using a fork lift as a camera mount. Get a tripod with a pole arm or a c-stand.
Try the same thing again only with a higher rotation speed. that's the most dangerous thing about cutting discs.
the slow-mo is good, but I really want the name of the angle grinder who mistakenly sign up for this..., cause it passed any kind of torture that I would ever do to it.