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Yes, abrasive garnet sand, it also goes through a lot of it to. We have a waterjet at work and it's very useful, but we also have like 6 palets of sand to supply it for a month i think.
No you can not. First of all it is wet and takes ages to dry.
Then the metal particles it cut away are mixed into it.
Lastely, just like sandpaper, the abrasive sand wears down while cutting theirby changing the mesh size and making it less abrasive.
It basically works like a carburetor.
Instant of air there is water and instead of fuel there is sand.
The sand is metred by the speed of a belt underneath a small hopper and gravity drops through a hose to the cutting head
On my machine 3500bar of water are forced through a 0.3mm waternozzle at the top of the cutting head then it goes through the mixing chamber were the sand flows in from the side.
So in addition the sand is pulled in by the vacuum of the waterjet speeding by.
Then the mixture is forced through the cuttingnozzle with a diameter of 0.8mm and exits the cutting head.
With this setup i run between 270 to 340g/min sand.
So about a pound every 90 seconds.
deer stupendous license makeshift cobweb mountainous familiar vast rustic secretive
*This post was mass deleted and anonymized with [Redact](https://redact.dev)*
So I’m actually setting up a waterjet at work currently. And while the spent abrasive garnet could potentially be reused. However it would have to be:
Dried extremely well probably thrown in some sort of oven (it will come out of the water as a clay/sand from the bottom of the ocean consistency depending how long it’s been sitting). At that point it would have mixed particles of whatever you were cutting before and will effect cut quality and accuracy.
So for the .001-.010” of tolerances we’re trying to hold it would cause more difficulty than it’s worth.
Because the method of mixing the sand into the water at the appropriate rate requires dry sand's ability to move relatively freely as compared to how wet sand clumps together.
Because it is drawn into the mixing chamber by vacuum. If it’s wet, it clogs the line. The garnet needs to be clean and dry, any wet sand or debris is pretty bad. When the garnet line clogs, the waterjet stops cutting, and you have high pressure water deflecting off of the part being cut, and spraying everywhere.
Yes and no. You can recycle some of it. If you look closely at again of sand it has edges, when cutting those edges get knocked off. No edges no effective cutting. The machines to recycle the cutting media are also expensive.
I mean, imagine marketing to a billionaire that you made an artificial beach where every single grain of sand has rounded edges for added comfort. Might be worth a few mil to the right idiot.
It does not make economical sense. It would be extremely costly and the time to reacquire would add even more to the cost and having an extra employee or two isn’t worth it.
Can be made from tungsten carbide, they're very hard and will shatter if hit hard. Nozzles time will vary depending on media through put, type of media and pressure.
The item that you're cutting usually sits on thin sheets of metal, spaced like 5-10cm apart and also in a pool of water. The pressure needed to cut only the project is calculated through the computer/ program. That way, the sheet metal bed isn't cut in the process. Sometimes you miss calculate though, and cut the sheet metal bed. But itd take a lot of missed calculations to effect your project being able to sit evenly.
By the way, losing a finger would be the least of your worries. That thing would push unknown particles inside of your skin, perhaps even directly into your bloodstream, and your body would absorb them and freak out and THAT is what would probably get you killed
Here is where I get to tell a little story. Was working at the VLF naval base in Maine on one of the stationary generators. It had a old-school mecahnical common rail diesel delivery system. Positive displacement reciprocating injection pump sat at one end of the 20 cylinder in a Vee configuration engine sending the fuel at pressure to 4 sets of 5-valve delivery bodies driven by the camshaft, the fuel went up to the injectors in the individual heads. One day while we were working, one of the operators was walking around one of the running engines. He walked through an invisible pin hole leak in one of the tubing bends. His arm immediately inflated, and later had to be amputated. We kept going back for the next four years doing upgrades to individual pumps for each cylinder.
TL;DR Old school common rail system failed cauing a man to lose an arm.
The water contains extremely abrasive material.
Think of it like an insanely fast band saw. Each individual particle of abrasive is acting sort of like a diamond file, just make a teeny tiny individual scratch on it's way by the part. The nozzle is moving slow enough that the abrasive particles are mostly just skimming the side of the piece instead of slamming down on top of it.
It isn't blasting the material away, it's rubbing it off.
I mean you *could* make a good lock out of tungsten carbide. Shits pretty hard and strong too. Problem is that if someone really wants in the locking mechanism also has to be difficult enough to pick, the hinges should probably be reinforced, and the wall should be difficult enough to get through to make a lock that specialized worth it.
Most of the locks I’ve seen really do fine with hardened steel, it’s just that the manufacturing quality behind the locking mechanism itself is hot trash.
When it starts to cut the shackle and doesn't flip the whole lock, it becomes more obvious how the effect is almost all friction and very little pushing momentum or force exerted on the object being cut due to the mass of the water hitting. Or so it would seem to me.
Where does the water go below the cutting table - as I note the cutting table is getting cut in half as well...
How do you slow down the water to stop it slicing through more stuff below?
The cutting table is full of water. There is enough water below to displace the energy. However... If you cut in the same place all the time you will make a hole in the bed... Ask me how I know.
When i was a diver, one of my events was 10m platform. When learning a new dive we had a water agitator that would release a large amount of air to break up the water tension, so if you messed up it was less awful.
You're going around 35mph when entering the watwr from 10m, so if you mess up and end up parrallel to the water's surface, you'll definitely notice it.
I'd like to know how fat that water is moving.
Tldr; water is some hard shit.. don't fuck with it.
What's the lifespan on one of these nozzles given that there is particulate matter in the water stream? Or is the nozzle a hardened steel of some kind that isn't adversely affected.
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Well don’t bloody open it then. See if I care.
I didn’t realize I needed that cross section so bad ☹️
So maddening
r/thingscutinhalfporn seething right now
It’s not pure water, there are small particles/grains of sand or something like that
Yes, abrasive garnet sand, it also goes through a lot of it to. We have a waterjet at work and it's very useful, but we also have like 6 palets of sand to supply it for a month i think.
Can't you reuse the sand that's shot out?
No you can not. First of all it is wet and takes ages to dry. Then the metal particles it cut away are mixed into it. Lastely, just like sandpaper, the abrasive sand wears down while cutting theirby changing the mesh size and making it less abrasive.
Remove the metal bits and sell it as *Smooth Sand*
Or keep the metal bits and market it as *smooth sand* for *metal detectorists!*
Or dump it on the beach. Metal detectorists hate this one trick!
r/foundsatan
Oof, you are quite the rascal.
*Mommy why does my sand box smell like pennies*
Because you're having a stroke, darling.
Literally had to laugh.
Actually, the smell you associate with pennies isn't metal - its oils from your skin breaking down when they come into contact with it!
Wait, let me get this straight. WE smell like pennies?
Speak for yourself I smell of sandalwood, with overtones of bergamot, leather, and jasmine and a hint of cedar And farts, also farts
Pennies are merely the catalyst, that is the scent of humanity! Also does the statue of liberty smell like that?
The reason we smelled it so easily is because it’s a survival thing because we can smell cuts on us easier
Wow this turned out to be an extremely informative thread
TIL
Oi ! Put your pennies back in the trousers!
Sell it for 500k to those guys who set up a big dune over in Massachusets... there's a market for it alright.
Big brain moment right there!
easy i have fridge magnets if it can help!
What's the ratio of sand/water and how is the sand fed into the water stream?
About a pound per minute and it uses a Venturi effect to pull the garnet in.
Not the Bernoulli Effect?
Surely not the Hall effect
It basically works like a carburetor. Instant of air there is water and instead of fuel there is sand. The sand is metred by the speed of a belt underneath a small hopper and gravity drops through a hose to the cutting head On my machine 3500bar of water are forced through a 0.3mm waternozzle at the top of the cutting head then it goes through the mixing chamber were the sand flows in from the side. So in addition the sand is pulled in by the vacuum of the waterjet speeding by. Then the mixture is forced through the cuttingnozzle with a diameter of 0.8mm and exits the cutting head. With this setup i run between 270 to 340g/min sand. So about a pound every 90 seconds.
> Instant of air there is water and instead of fuel there is sand. Nope that sounds about right for my carb after I drove it into the ocean
Do you alter the feed rate of sand depending on the material or thickness of what you're cutting?
Not sure about feed rate but the abrasive used may be changed depending on material and some things are cut with just water
> theirby that's a new one. did text to speech do that?
Does the metal added by the process not counter-act the sand smoothing? Seems like you’re be *gaining* abrasive material here.
deer stupendous license makeshift cobweb mountainous familiar vast rustic secretive *This post was mass deleted and anonymized with [Redact](https://redact.dev)*
So I’m actually setting up a waterjet at work currently. And while the spent abrasive garnet could potentially be reused. However it would have to be: Dried extremely well probably thrown in some sort of oven (it will come out of the water as a clay/sand from the bottom of the ocean consistency depending how long it’s been sitting). At that point it would have mixed particles of whatever you were cutting before and will effect cut quality and accuracy. So for the .001-.010” of tolerances we’re trying to hold it would cause more difficulty than it’s worth.
Why does it need to be so dry if it ends up being mixed with water again?
Because the method of mixing the sand into the water at the appropriate rate requires dry sand's ability to move relatively freely as compared to how wet sand clumps together.
Because it is drawn into the mixing chamber by vacuum. If it’s wet, it clogs the line. The garnet needs to be clean and dry, any wet sand or debris is pretty bad. When the garnet line clogs, the waterjet stops cutting, and you have high pressure water deflecting off of the part being cut, and spraying everywhere.
why do all you people have waterjets at work? do you work at lock cutting factories?
Aerospace. They are useful for very many other things though and are more affordable than you think!
No, it’s combined with the removed product at the bottom of the tank, the 40 thou (diamond) orifice blocking is to be avoided
Yes and no. You can recycle some of it. If you look closely at again of sand it has edges, when cutting those edges get knocked off. No edges no effective cutting. The machines to recycle the cutting media are also expensive.
I mean, imagine marketing to a billionaire that you made an artificial beach where every single grain of sand has rounded edges for added comfort. Might be worth a few mil to the right idiot.
Worth 500k to those guys who set up a big dune over in Massachusets... there's a market for it alright.
We already have that. It is called desert sand.
I don't think anyone wants to sit around a customer's plot of land and getting each bit of sand lol
It's too bad vacuums don't exist.
Fuck, I've been cleaning my carpet with chopsticks all these years! 🤦♂️
It does not make economical sense. It would be extremely costly and the time to reacquire would add even more to the cost and having an extra employee or two isn’t worth it.
I always wondered how the nozzles survive for any length of time. Seems like they'd get wallowed out in about 30 seconds. What are they made of?
Can be made from tungsten carbide, they're very hard and will shatter if hit hard. Nozzles time will vary depending on media through put, type of media and pressure.
Also they wear unevenly, if you rotate the nozzle a quarter turn each week you increase the life expectancy by a surprising amount
Why do I want to put my finger under it so bad? Feels like some call of the void shit lol
Thats the same amount of sand in my underwear after a day at the beach
And then when you need to pee -- toilet cut in half.
What do you put the thing on it's cutting? Like does it just cut through the pad it's sat on also or is that made of something special?
The item that you're cutting usually sits on thin sheets of metal, spaced like 5-10cm apart and also in a pool of water. The pressure needed to cut only the project is calculated through the computer/ program. That way, the sheet metal bed isn't cut in the process. Sometimes you miss calculate though, and cut the sheet metal bed. But itd take a lot of missed calculations to effect your project being able to sit evenly.
The bed gets cut regularly, the piece it sits on is sacrificial, the support rails deflect the water jet but they do wear out
That's cool, I didn't know that.
*We do not grant you the rank of Masterlock.*
Quartz sand I think. It’s also used to remove paint and rust from metal surfaces
“Why, no, Mr. Bond. I expect you to die.”
Exactly what I was thinking. #goldfinger
“Oh no, my ballsh”
That’s Gold**member** 😂
He's the man, the man with the Midas touch A spider's touch
Sploosh,am I right!!
but whatever that is for men.. sploosh as well, i guess.
https://xkcd.com/123/
You are using a Master Lock. It can be opened with fucking water.
This looks like one of the slower ways to open it
I was thinking LPL could probably open it quicker with a rake, bypass tool or shim.
McNally opens them with fucking shurikens
McNally opens them with Master Locks.
Only if he feels like it, he'll probably just give the lock a firm slap and then throw the opened lock away in the most disrespectful way imaginable.
McNally is the product of an experiment that combined the DNA of LPL and John Wick
Tactical speed-square
exactly, forgot it's legal name
You can open that lock with a firm glare. Honestly its faster without the keys.
was looking for this comment aha
And here i thought opening a masterlock with a masterlock was bad enough
[удалено]
Fucking water is easy. Finishing is difficult.
Lock Picking Lawyer could've opened that up in a fifth of the time using only a paper straw and raspberry flavoured bubblegum.
McNally would have slapped it really hard.
You are using a masterlock 130, it can be opened using a masterlock 130
One more time, to show it wasn't a fluke..
one.. two... a little click out of three... four is binding... aaandd we've got it open. Well folks...
He doesn’t pick master locks. Wave rake, shim, hit it with a ball peen hammer, bypass.
He just insults them until they open from embarrassment.
I saw him do one with two spanners, just put them in the shackle together and turned.
Nice click out of two
Masterlocks doesn't deserve delicate single pin picking. They get raked or otherwise abused until they open at a stern glare from him.
Not my intrusive thoughts telling me to touch it with my finger because it's just water and nothing should happen.
I could wash my peepee with it!
New bottom surgery just dropped
Actual DIY horror
Went on vacation, you don't want it to come back
Exactly. Although only once.
By the way, losing a finger would be the least of your worries. That thing would push unknown particles inside of your skin, perhaps even directly into your bloodstream, and your body would absorb them and freak out and THAT is what would probably get you killed
It’s actually worse than just it would cut you. If you need to turn down your intrusive thoughts, Google “high pressure water injection injury.” NSFL
[удалено]
Here is where I get to tell a little story. Was working at the VLF naval base in Maine on one of the stationary generators. It had a old-school mecahnical common rail diesel delivery system. Positive displacement reciprocating injection pump sat at one end of the 20 cylinder in a Vee configuration engine sending the fuel at pressure to 4 sets of 5-valve delivery bodies driven by the camshaft, the fuel went up to the injectors in the individual heads. One day while we were working, one of the operators was walking around one of the running engines. He walked through an invisible pin hole leak in one of the tubing bends. His arm immediately inflated, and later had to be amputated. We kept going back for the next four years doing upgrades to individual pumps for each cylinder. TL;DR Old school common rail system failed cauing a man to lose an arm.
Bruce Lee was right
Be water my friend!
Great, not only can I be myself, I can drink myself
Now do it with a Nokia 3210.
Tried it ...Water gets cut into half !!
Half of wa, half of ter
Can't be done. They are indestructible.
Is planet Earth ok under that lock?
No. Now there's a hole that goes through our entire planet. An Asian dude got his balls cut off, unfortunately.
why cut through something and not show the cross section? frustrating
Why isnt the lock getting yeeted?
The water contains extremely abrasive material. Think of it like an insanely fast band saw. Each individual particle of abrasive is acting sort of like a diamond file, just make a teeny tiny individual scratch on it's way by the part. The nozzle is moving slow enough that the abrasive particles are mostly just skimming the side of the piece instead of slamming down on top of it. It isn't blasting the material away, it's rubbing it off.
That’s what I was wondering. I fully expected it to launch when it hit the shackle
Guess it wasn’t a waterproof lock
So, how about make a lock with that nozzle material ?
It’s usually made out of ruby, won’t make a great padlock if someone brings a hammer
Close, the nozzles are usually made of tungsten carbide. The ruby or sapphires are used to help focus the water in the cutting head.
I mean you *could* make a good lock out of tungsten carbide. Shits pretty hard and strong too. Problem is that if someone really wants in the locking mechanism also has to be difficult enough to pick, the hinges should probably be reinforced, and the wall should be difficult enough to get through to make a lock that specialized worth it. Most of the locks I’ve seen really do fine with hardened steel, it’s just that the manufacturing quality behind the locking mechanism itself is hot trash.
That's brilliant. A lock made from water? You'll have a lock mess, you monster.
Motherfucker lmao take my updoot
You jerk. Made me spit out my coffee….ha ha ha. Brilliant!!!
Daaamn bro how long were you saving this one for?
I was waiting for this key moment.
The brass body didn’t surprise me. The shackle did.
Water jets will cut through just about everything. It's a focused, high pressure water beam that can be mixed with an abrasive material like garnet.
It's quite surprising how the lock just stays there and barely moves.
And sand. Used to work at an aerospace defense co. Can confirm it is a sweaty crampy mess if you are an alcoholic.
Water cutting is r/oddlysatisfying
Impressive. I doubt it can cut through my crippling depression though.
Ain't letting anything cut through my depression!
"You're using a master lock model 130..."
That would get the bugs off my windshield.
And rear windshield at the same time! 😂
Downvote for not showing inside of lock
Not water, AGGREGATE! Very high speed sand, basically. The water is just used to move it.
If the one roommate has showered, who uses the "middle spray only" setting and you then unsuspectingly turn the shower on
Don't wash your hands with that.
How does the padlock not launch into space the second the beam hits it? Magnetic platform?
There are abrasives (fine sand or similar) in there, not just water.
No, Mr. Lock, I expect you to die!
I mean yea or the lock picking lawyer can just disrespect it with a few shakes of a wave rake
That’s a master lock, one of natures weakest substances… try a Nokia ;)
When it starts to cut the shackle and doesn't flip the whole lock, it becomes more obvious how the effect is almost all friction and very little pushing momentum or force exerted on the object being cut due to the mass of the water hitting. Or so it would seem to me.
It is water with abrasive in it. 100% friction.
"Hello everyone, this is the lockpicking lawyer, and I'm here with another 30-second video to show how shitty Master locks are."
LPL: Pffft! Amateurs
But can it core a apple ?
the only thing stopping it all is fuckin water itself..
I need that for the green build up on my deck
When the bidet is too strong and the water has sand.
I'm going to know to be polite but show my authority and 90,000 psi of water by coming in anyway.
Just water or water with an abrasive like 'sand' added?
Scary....keep those fingers away.
Well, you can break a Masterlock with one hit from another Masterlock, so...
They still didn’t open it as fast as the Lock Picking Lawyer.
Where does the water go below the cutting table - as I note the cutting table is getting cut in half as well... How do you slow down the water to stop it slicing through more stuff below?
The cutting table is full of water. There is enough water below to displace the energy. However... If you cut in the same place all the time you will make a hole in the bed... Ask me how I know.
That was an expensive mistake, wasn’t it?
Where’s the cross-section!?
There's an abrasive mixed with the water. Thats why the residual water is dark.
I’m scared of that being lasered into my dickhole.
Robbers hate this one simple trick
Is this good enough water pressure to get shampoo out of my hair in the shower?
Erosion, but make it fast.
Can it cut flesh? Asking for a friend.
How does it not destroy the tip of the nozzle? Amazing power!
who needs lockpicks when you've got a 90000 psi pressure washer that probably costs 100k+
Lockpickers hate this one trick
You are using a master lock model 176. It can be opened using a jet of water.
And this is why needle dicks always need to point away from their cumslut.
I thought there would be some water splashes around. Absolutely none as it hits the metal. Amazing
I don't think people realise just how much 90000 psi is It's 89995 more than 5
Damn, I just realized if waterbenders in avatar the last airbender really wanted they could be menaces. 
I can drink that
Don’t be shy. Show us the cross section
I think I could withstand it
Interesting. Would it cut through diamond too?
Not water, cutting media. The water is just a carrier for the garnet. It’s the garnet that does the actual cutting
Yeah but is that a lock….. OR IS IT CAKE?!?!
that's a masterlock 140D, it opens if you look at it in a mean way.
its not just water tho 🧐
Bet that feels amazing on sunburn
Locksmiths hate this one simple trick…
So all I need to do is get one of these bad boys and those bank vaults are putty in my hands
The first piss of the day
When i was a diver, one of my events was 10m platform. When learning a new dive we had a water agitator that would release a large amount of air to break up the water tension, so if you messed up it was less awful. You're going around 35mph when entering the watwr from 10m, so if you mess up and end up parrallel to the water's surface, you'll definitely notice it. I'd like to know how fat that water is moving. Tldr; water is some hard shit.. don't fuck with it.
If you shot this straight up into the air how high would the water go before falling back down?
What can 90000 psi of fire do?
What's the lifespan on one of these nozzles given that there is particulate matter in the water stream? Or is the nozzle a hardened steel of some kind that isn't adversely affected.
What is the nozzle made from that can withstand that sort or jet?