How Strong are Crowbars? Hydraulic Press Test!
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- Опубліковано 13 гру 2019
- Which is the strongest crowbar? Cheap one, expensive one or aluminium crowbar? How many tons they can take? We are going to test that out with our 150 ton hydraulic press and 150 ton force sensor. Don't try this at home! we are professional and all people were behind really strong blast shield and had personal protection equipment.
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Do not try this at home!! or at any where else!!
Music Thor's Hammer-Ethan Meixell - Наука та технологія
If you want to see this stuff happening live follow us on Twitch www.twitch.tv/hydraulicpresschannel We stream every sunday from 4pm Finnish time for 3-7 hours and film usually HPC videos and clips for other platforms the whole time.
yes this was a fun session to watch sad that I have to stay up until stupid o' clock to watch in Australia moi moi
Do a Terminator Skull!!
Good choice in tee shirt
I'm glad I could watch some Twitch from the hospital. Was discharged on Friday, but will have at least one more week off from work to continue resting and recovering at home. Still slow getting up and down and moving around with either a walker or wheelchair.
Thanks to all for words and thoughts of support.👋
Here a suggestion. Try sledgehammers. Not all of them are made the same... Especially here in the US, lol.
strongest crowbars in universe were used in black mesa
But also cheapest.
@@terot8341 how can you say that?
@@mahdi8572 Shape of crowbars at Balck Mesa are similar to these cheapest.
@@terot8341 these are fakes
@@mahdi8572 the one that freeman uses is red & black, the cheap ones are blue and yellow which aren't the colors of a true crowbar.
*Freeman looks at the strongest one, he nods, his choice has been made."
Lol I just started the video and had the same thought
It gives me hope to know that the top comment is a half life reference.
*Half Life* reference... for those asking
*G-man awaits
"Rise and shine, Mr. Freeman, rise and shine."
Im sure the expensive one went through a much more extensive hardening process. It chipped because it is well tempered. The soft steel ones would deform before chipping/cracking.
it also reformed a lot more than the others
I highly suspect it has a treatment that gives it spring steel characteristics. I was very impressed by it's ability to return to shape. Straight hardening would make it brittle. In essence, by giving it flexibility, as a spring, it is able to resist simple ductile bending, as well as hardened shattering. By flexing naturally, it continues to put the maximum strength into the end as possible.
I think it was pretty weird how long it stayed at 0kg
@@MrSopuli3 I say the 100 Euro bar was the best value for money by a wide margin.
The other bars didn't see over 200Kg until they were severely bent.
From the standpoint of resisting force and returning to original form the 100 Euro bar was performing well above the rest in price to performance.
The cheap bars performed so poorly I'd suspect the alloy they used was really dirty.
Here I thought you were going to have crowbar fragments flying halfway to Estonia 😳
It was super scary to do this video :D People in our twitch stream were sure that we are going to die but we had really good safety planning and shield at place so we were able to do this one safely. But it was still nerve wrecking to watch them getting bent like this
Same..super anxious watching it bend 😅😅😅
Ideally you would want the bar to deform and not shatter, for safety reasons. That being said, I wouldn't want to do this without a few layers of protection just incase.
It would be interesting to see the test with a thermal camera😀
Ohh ye
@@ricky107_ yah🤔😁
Would be pretty hard to see coz they're all reflective surfaces :(
Nice touch on the cybertruck with the shattered windows
snobi76 at least they remained and stopped the projectile
Standard windows would not
Therefor still providing more protection.
@@beepboopthemyth no
girlsdrinkfeck lmao yes
Lemme throw a brick off your car window
Lemme know how the surgery goes to correct the damage the brick will do to your skull mate
@@beepboopthemyth pull ya tongue out of muskies arse
Bwwp Boop. You are the definition of fanboyism
Wow, that €100 bar didn't even permanently deform. That's actually pretty impressive, even if the end chipped.
Who else had their safety squints on?
I don't know why though
Skookum
Safety glasses to protect from the video
You, Me, and AvE, for sure!
A bar that bends is a lot safer than one that brakes.
👍
Gordon Freeman approves this.
Stargate!
And i approve this!!
I was saying same 😂
HL and SG. Winning!
These tests are to find the best one to use in Half Life 3
When I think how much potential energy is welled up under compression on those bars, I become VERY happy I'm observing this in a video rather than on-site!
7:46 “will it fly?”. I feel a new series coming to this channel.....
pls extract some coffee with your press, like an hydraulic espresso
Watching it with anxiety, that the crow will snap and fly away through my phone screen
crowbars unders stress like this have a tendency to shoot over to the side... Towards your leg, face, etc...
Scary
They’re waiting for you, Gordon. In the Press Chamber.
It looked like the expensive one returned to its normal shape much better than the others. Not only did it handle more force, it went back to close to its original shape after you pressed it. Also, you made a great rig to hold those crowbars but the table you had it on was wobbly as hell! lmao!
Great content folks!
The table was the force sensor
@@LordZarano No, he said he measured the pressure in the head. @0:38
That's the joys of different steels and heat treatment
These tests are to find the best one to use in Half Life 3
Portal 3 too plz
Torrey Whiting Chell doesn’t use a crowbar though
I like that Anni made the Cybertruck like the original one with cracked side windows.
Tie a rope to stuff like that in case it lets loose.
Tracing the bars onto the cardboard before testing would show the deformation really well.
Perfect example of steel with different yield strength. The expensive one have probably 2-3 times higher yield strength. However the elastic stiffness is the same for all of them. Difference is that the stiffness keeps on longer for the expensive one hence higher load, while the others yields early without carrying more load.
As Lauri mentions the bigger dimensions of the expensive one also helps increasing load.
Great video as always. SUPPER videos! One of the best channels on UA-cam!
Most steel alloys have the same approximate stiffness, but not strength. The weak steel will plastically deform at the same stress that the stronger alloys will recover from. The higher number of the good crowbar comes from the fact that it bent further without plastic deformation, not because it is stiffer.
excellent comment.
@jon doe they both bent under pressure. But the cheap one stayed bent afterwards and the expensive one bounced back into shape
And also he had the weight wrong as the leverage was different.
The aluminum one is for putting tires onto wheels.
Or for non-sparking applications.
Yep. It's a "tire iron"
My best guess as well, but it's not quite like the tire bead breakers you see doing a google image search. When I searched "aluminium pry bar" I found almost an exact match from a company called "Hultafors". Seems they are used mainly in auto shops for adjusting alignment. The softer aluminium does not damage the surface it is used against.
We use them in machine shops to adjust parts on the machine tables.
You are all wrong. It's used for beating scumbags
Gordon Freeman would like to know your location
This made Gordon Freeman cry.
You're loading the sensor unevenly, so your pressure readings are likely inaccurate
This is a good measure of how torque is transfered tbh
@@mortarsquad12 But the sensor is being loaded off-kilter, at an angle. Notice how the force on the LCD seems to jump up when one of the bars make contact with the center of the press surface.
Yeah I think it is jammed due to uneven loading. There’s some serious force required to deform those bars.
Also, as the press surface gets lower the effective length of the bar (lever) becomes shorter which causes more force to be needed to bend the bar, since the leverage has been reduced. This is kind of a mess and they need to develop a press surface which exerts the effort against the bar at a fixed point instead of a variable one.
@@gwizzlefuhshizzle this is because the moment is now achieved by applying a force at a closer position to the rotation axis.
Important takeaway - the expensive one took a lot to bend, almost toppled their rig, and came back very nearly to true.
Gordon Freeman’s indestructible crowbar
This is the right way to start a Saturday morning! Watching from Iowa, USA! Love you guys!
Same! Clinton, Iowa!
Saturday morning 1 year later! Welcome back
The main thing is the expensive one didn't permanently deform nearly as much as the cheaper ones did, it took a huge bend and rebounded back to where it started. Meaning its fatigue strength is going to be significantly better than the others.
I got so excited when I saw you guys released this like 40 minutes ago!!! Love you and annie such a great couple!!!
I love you guys don’t mess around it’s just straight into it
Possibly one of the reasons your channel is so popular
Thank you for your videos! They inspired me to start my own channel! Keep up the good work !!
you guys should send HIM a mulcher!
Super nice toys you got there! you should munch some Ikea furniture :D I think that would be really fun to watch
@@HydraulicPressChannel super idea! We might just do that! :)
Last press was awesome!
Before and after images of each curvature change would be a nice visual aid.
The expensive one retained most shape. It also appeared to have further hardened ends. The cheap red one was also good at keeping its shape.
Love the cybertruck.
When you were bending the crowbars, the contact point changed on the force meter head, would that not move the distance from the turning point and therefore change the amount of force needed, there was a steep increase once the bar was flat against the head. given they all went flat near enough your final measurements are probably equivalent. Lots of bendy bar fun :)
As a kid I always wanted the "titanium crowbar" in the classic size and shape (like first one tested) I'd see in Cavalry Magazine. I still do, now that I think about it.... Pritty guud!
It’s been a while since I watched your videos and your English has improved significantly. Those crowbars didn’t perform all too bad as I was thinking that they would end up shattering from stress
I'd like to see a load sensor on the claw end to see how much force was applied by the crowbar.
The two broken windows was a thoughtful detail. Lol Nice touch.
The expense one was the best one that went back to normal almost remembering its original shape
Intro and outro Is killing it. Very nice
Actually, I am glad to see that they all just bend. When using these I am afraid that they will fracture and pieces fly. I seriously doubt I will put 100’s pounds of pressure on mine!
You haven't applied enough force to bend one yet?
Santos: yup - then I was able to meet the local EMS team!
They can absolutely snap, I think the way they tested them prevented it from happening. See here: ua-cam.com/video/UH_JarCh7a4/v-deo.html
I’ve worked as a die setter for stamping press for years, and I’d have to say a nice crowbar/pry bar is easily my favorite tool. I do wish that this test was performed alternatively on the working end of the bar, and the anchor was at the handle. The length of the bar should have some spring to it, but the hook should be solid
If you try this again, maybe try making an outline of the bars on a sheet of cardboard before you press it to compare the changes in shape and angles of the bars that happen as you press it.
Please keep making these. When I retire I just want to watch your videos all day and forget the rest of the world.
"This Cybertruck is very dangerous and we have to deal with it"
Hahaha!
That truck definitely needs a minigun mounting option.
For the expensive one you are paying for the steel used and the heat treat. It's pretty amazing that it pretty much sprung back to its original shape. I've had knives bend pretty bad while splitting wood only to come out straight when I was done. Nothing like a good heat treat.
I'm hungover while watching this. When they were testing the last one, I thought it was me having a hard time focusing on the force sensor.
It's important to note that the vast majority of force applied to this is not in the downward direction, towards to sensor, it's being diverted since it's a lever, applying significant force to the join and to the cube of metal holding it in place.
It should be pointed out that the amount of deformation after the force is taken off is an important factor in the quality as well.
All but the most expensive crowbar had quite some permanent deformation, ak plastic deformation, so they are a softer kind of steel.
The expensive one however sprung almost completely back in its initial shape, which tells that it is made from a high grade steel and well hardened and tempered to get a good combination of hardness and elasticity.
The yellow crowbar could be bent when just using human strenght without any extension.
I think the aluminium crowbar is used in montage when it is important not to scratch or damage surfaces of the parts you're working on.
Awesome video as always ! Started pressing as well :)
everytime he says "and" im expecting an "here we go" xD
You are switching the point of attack of the down-force, your lever shortens at the end. That is why the force always goes up at the end.
Great tests!
I love this dude he does so much and doesn't click bate thank you dude
a bit of analysis:
the cheap tools (#3 and #4) bend at the "elbow" where stresses are highest
tool #1 doesn't bend at the elbow because it is wider and was work hardened in the forging process, instead the steel starts flowing just above where stress is highest in the part that retained its original yield limit
tool #2 is made of stronger steel and might be heat treated. it is also shaped differently with lower stress concentration. it bends far less than the others.
#5 is a piece of alu
11:16 Cybertruck already have broken glasses - just like in a promo! Bgahahaha!)))
"they say this steel cannot be pressed" lololol
I love your creativity!
Thanks! It wasn't easy to get them into the machine in the way that mimics their real use but I think we managed to do this one pretty well
I love the fact that the Cybertruck at the end even had cracked windows. Nice eye for detail, guys.
I was hoping in headcrab in the end, but...... the truck didnt disappoint haha
The pressure is concentrated at the bend of the bars so the best two places to pick up the true forces is at the bend or the pressing point on the handle.
Greetings from the international space station!
Your blood isnt all clotted up, is it?
@Conrad Kenneth Godspeed!
@@jeffreythomas3904 christ, not that fast. How fast *is* godspeed? I'll bet its really fast.
???
Carl Klinkenborg not you, wondering why this guy said greetings from the ISS
I have a cheesy, cheap crow bar I bought about 20 years ago. It has been very handy over the years. I know for sure it wouldn't last long on your press but it sure does come in handy to me. Currently using it on my truck for some repairs.
What you measured in kilograms is the pressure that it takes to push the crowbar, that tests hoe much force is needed to bend the material, for example the expensive crowbar took 800 kg to deform, the cheap one took 200, so that is the results, simple phisics
Cool video thanks! I think your sensor is getting 'jammed' from the unequal force on the one (left) side of the piston. Once the aluminum bar bends and starts pushing evenly and then more on the right side, the sensor reading finally kicks in, albeit a bit late. There are several ways to mitigate this, mostly just making a smaller, longer press-bit to keep the forces more to the centre of the press. We still got some very cool test data here. Product comparisons, ftw!
I love the broken windows on the cyber truck. Awesome! :D
I'd like to see you stack weights on top of that sensor and see if the calibration is still good, or if the sensor is borked.
“Gordon Freeman wants to know your location”
Love your videos and have been watching them for some time. Greetings from Nashville,Tennessee USA
9:00 The aluminium one is for installing doors and cabinets - to use your foot to lift them up so your hands are free to screw them to the wall at the right height.
Now I'm happy I bought the Hultafors crowbar!
Is so! Grüße aus Deutschland.
Hultafors is one of two quality ones in Sweden. The other one is called "Tove" and made by "Gränsfors Bruk" who also make very good axes. www.gransforsbruk.com/
Still the best channel on UA-cam.
The expesive one, made 800kg because after it leveled, it has changed touch point way closer to the center. It was better than cheap one, but only few %, not 300%
Plz test how much weight different chairs can handle before they break
Lol thats a good idea.
The final number jumps up because the punch of your press is wide and the point you are pushing on gets much closer to the fulcrum. Therefore giving you less leverage at the end. You need a pointy attachment so the distance from the fulcrum doesn't change.
The expensive one doesn't bend (much)! it just flexes. It is the best!
His English is great, and his accent is so versatile. Oddly satisfying. I really enjoy hearing him speak English. Hello from Kansas, USA.
The force sensor needs to be mounted under the base of the prying end, directly against it so you're measuring the force applied at bend
These tests are interesting but are imperfect as you could test both ends of the crow bar and pry bar (the aluminium T-1000 blade like thing) and finally try break the bar in a strong jig to determine its power.
Maybe 2-3 more tests would help narrow down which is the best tool.
I like how they are always up to "deal wit it"
Nice shirt!! Such a good album! 🤟
Methinks the problem with the sensor was that the rig was pivoting over it, the force isn't being directed into the sensor until there is no more room for the whole thing to rotate.
I've used a hultafors, the torque transfer is way Superior to anything else I've used. Diminishing returns, but stupid nice to use
Have you considered reversing your rig to push on the foot of the bar?
This would give you a better number to gauge how much lifting force you're exerting and you could use a load cell at the human end to get how much force is there.
The colors! Someone was in that cybertruck.
Neat.
Olisitte pahville ensin piirtäneet mallin alkuperäismuodon, ennen kiusaamista, ja jälkeen, että mikä muodonmuutos tapahtui ja missä kohtaa rakennetta se tapahtui.....
A couple months ago my son(28) snapped a crowbar in half near the bend prying off 2×12 planks that where bolted down on top of a parapet wall on a roof. 👍😁
While it's an interesting measure, "kg per euro" is not an indication of whether something is worth the price.
While I agree with you, just imagine having three cheap crow bars under the same object at the same time! Oh the savings!
Lol jk
Learning all the math behind this. Nice to see some of those book problems in real life
YOOOO I see you rockin the Amon Amarth
The silver one is a Tile Lifter, used to remove tiles from a floor or wall.
"Actually, the crowbar snaps in two"
"Just kidding"
I think the measure of force should be done where the claw contacts what's being lifted, to measure the lift force. The press should have a rod attached perpendicular to the crow bar, so you've got one point of pressure a consistent distance from the claw, rather than the edge of a flat plate, until the bar is horizontal, and the whole plate contacts.
If I remember, the Hultafors crowbars are designed on purpose to bend and not snap for safety reasons. Yes it will flex, but that is a massive amount of force required to do so, more so than the average person is every going to apply on it for that long of a time. Yes all of them flexed, but that one seemed like it took the most force to do so.
I have concerns about the accuracy of the pressure sensor, when the crowbars are bending 20 degrees before there is 20 kg of pressure.
Like to see this repeated with real crow bars and/or a burke bar. Best part of this is that even the cheap crap didn't fail catastrophically. When I have my hands on one end I like knowing I can feel it give long before anything goes snap. If your numbers are even close than I can load up a long bar way more than I thought as I've bent plenty of them in my time.
Rise.. and shine, mister freeman. Rise.. and.. shine..
So good to know this is super safe
A good measure for quality of this tools, i think it's the return in his original shape (or near it) when the press come up.. index of nice heat treatment.. (sorry for bad english)
This experiment was good enough for people looking to buy their missus a crowbar for Xmas to make an informed judgement before buying...🇬🇧👍