The EASIEST DIY Vacuum Chamber You Can Make
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- เผยแพร่เมื่อ 23 ก.พ. 2023
- Behold! The EASIEST vacuum chamber build I could come up with that still pulls a strong vacuum, has valves and gauges, and you can build in like 3 steps. This thing REALLY sucks, too. In a good way.
Best of all, I had all but 2 of these parts already laying around!
Parts List:
Suspiciously Cheap Pump and Gauge kit (and more): amzn.to/3YSxhzo
Pump More equivalent to what I used: amzn.to/3EA4p6O
Just gauges: amzn.to/3IPABG3
Polycarbonate Sheet: amzn.to/3ZdM7jN
Silicone Sheet: amzn.to/3xQb3SW
Tap and Drill set: amzn.to/3XV7O71 (measure yours first, make sure it's the right size/thread)
Videos Cited:
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Easy ... Lazy ... I think the word you were looking for is Efficient. Minimization of inputs while still meeting the end need. Great vid!
I like the way you think!
@@PaulsGarage i like the way you both think... i came to say your exact words 😎
Work smart, not hard :D
😊yes
I love the idea of using AC gauges for this. One thing I would do differently is, I wouldn't remove the quick connect fitting from the blue hose. Instead, buy a R12 to R134 retrofit kit (or just the low-side port, most auto-part stores should have it) and a suitable male to male fitting and install that into the lid. Now you can quickly and easily disconnect the hose from the lid, even after pulling a vacuum.
this is exactly the tutorial I needed. Thank You!
You have made vacuum pimping more accessible to the masses. Thank you! I am interested in acquiring a resin stabilization setup and this makes my dream of that less unlikely. Cheers!
This should work perfectly for that!
A note I know about, install an angled piece on the inside of the pot so that the rush of air doesn't spatter what you're working on. Have it angle so that it blows along the inside wall of the pot instead.
Diffuser is a good idea for sure
OMG dude!!! I literally have all of this! I have a pump and gauges from fixing the car AC 10 years ago. Now to the kitchen to borrow a pot
This is the perfect TH-cam video. Great idea! Thanks!
Paul, you rock. Thank you!
Thank you!
he actually makes really good videos he definitely deserves more subscribers
Thanks as this is a good idea. I've occasionally wanted some way to degas epoxy or something and already have a vacuum pump from my past HVAC job. You do a good job of telling us that the gauges will not measure true vacuum, but you're correct that this will at least give you a way to detect inaudible leaks.
I've never heard a pump sputter like that so it's obviously been abused (you're supposed to change oil every few uses), but great that it still works. I like that you show introducing air before shutting off the vacuum as well, but wish you'd told us why. Understand that you were keeping the video compact for youtube, though, and you did a great job of that.
Like the funny t-shirt and was laughing at the notes added. Simple and easy to follow thanks!
Nice job. We shared this video on our homemade tools forum this week 😎
Thanks for the share! Much appreciated 👍
Great video Sir ☺️
Thanks good sir!
Wow, that really does look surprisingly easy to make.
i was surprised it worked with so few parts lol
Excellent
Thanks!
Wanted one of these for a long time
It's pretty easy to make, I'm surprised
You can use the air intake side of most air compressors to pull a vaccuum. You will not get a very high draw but it will work good enough for most home and home workshop applications.
The leftover 1/2" sheet would make a good router base. Helpful when routing out a large area. Bigger than the regular base.
Not a bad idea!
I built mine to be chemical resistant. Mcmastercarr sheet of type a viton... stainless half pan from resturant supply is 10"x12" perfect for my 12x12 viton seal. Resturant supply places will also have full polycarbonate chambers depending on your pressures needed
Nice setup! If my fridge ever dies I hope it's not the pump because I've seen people able to get those to pull a vacuum fairly effectively before.
I did the same thing as you except a few changes:
1: I bought a brass cross 1/4in fitting and some brass 1/4in nipples and tapped the hole in 1/4npt. I also added a valve on one side and the gauge on top, as well as a hose barb on the other side. I haven’t cut out most of the silicone too just a little hole for the air outlet through the polycarbonate. I have a pressure chamber arriving so I didn’t want to cut the gasket to fit the pressure cooker I have since the pressure pot is larger and may have a bigger diameter. I got my pressure pot at the goodwill for like a few dollars and this route is by far the cheapest way to go.
You must be reading my mind 😉 I have some similar ideas for upgrades in the future. I'm incorporating this into a vacuum casting set up and upgrades are needed
Do you think you could use this to make boiled linseed oil?
Hello Sir I have been learning from you and your skills thanks for the work you do for us. I was wondering if it would be possible to make a pressure chamber attachment that can push molten further into the small crevasses of a mould to achieve better quality result ?
Interesting suggestion but usually people go the opposite, and use a vacuum to suck the metal into the mold. It requires porous plaster, but investment plaster is designed for that. Check out "vacuum casting".
The alternative to push more metal in is spin casting. Instead of air pressure, it uses centrifugal force. It's pretty cool but it looks to be size limited vs. vacuum.
Looks like a great way to start out, especially if you’re not doing this on some type of production level…
Should work perfectly for degassing investment plaster, I don't think I even need a gauge for that. Keep going until the bubbles stop
@@PaulsGarage exactly.
I bought one of those vacuum pumps when the first came out in the early 1980's. before that model came out most vacuum pumps with it's specs were so heavy they needed a cart or a helper to move them around
could the chamber be built out of pvc pipe for those longer pieces?
This is way better than the one I built in the 90s, I think I will upgrade
It's surprisingly easy
can i use a morden pressure cooker pot?
I think this is standard fare the moment anyone buys a vacuum pump. I had ideations of doing vacuum-assisted carbon molds some years back with a 12cfm pump and went this exact route, then ended up remodeling a kitchen and 'pilfered' one of the old cabinet drawers made out of some seriously thick wood, sealed that up with silicone and a lexan top cover. I use it once in a while to do vacuforming of abs shells, but more often than not, that pump gets used in lab-esque vacuum filtration. I have the same meter set (still in the box) and ended up going with a vacuum gauge and a distro-block; they're quite cheap and you get a reasonable amount of accuracy as to if your seal didn't get set 100% right away as the pump won't go down under 20 inches.
One thing to add or make is a mist capture container for the oil, as it sprays Everywhere. A simple do-job of PVC pipe, some fittings and a filter (the lawn mower ones are conveniently threaded most times) will do well enough for occasional use, otherwise the commercial guys want stupid money for essentially the same thing. (Seriously, look them up. They're all PVC and fittings for ~$150 US. It's ridiculous)
Add: I don't know why I never thought of it before, but I've got a pile of those air/water filter separators for my shop compressor that I bet would work equally well on a vacuum pump; one has a valve in the accumulation chamber to vent what would normally be water out of the bottom, as one tends to go through a lot of oil with these things. I get mine by the gallon jug. To the test bench!
The sputtering on start up is the motor dying. Thats the starting capacitor or whatever kicking on over and over until the motor reaches the running RPM. Once its running at a fast enough RPM the capacitor is cut off and the motor will continue to run.
Cool beans, man! This would work well too for vacuum-sealing Mason jars, when dry-canning something.
Also, I reckon you could just use the lid from that pressure cooker as well, if you added hose connections to it. If you didn't need to watch what is going on inside. I wouldn't do it with an All-American canner though!
You could totally use this for vacuum canning, and the lid fits on just about anything. I've never dry canned anything but this pulls a pretty good vacuum
Use the yellow hose for pulling the vacuum. Change the high side gauge (red one) to a low side gauge(blue one) & you could easily to 2 pots at once while still being able to see the vacuum pull down.
I have one almost identical in my toolbox. Mine is made from a 6" PVC drain pipe cap with a 1/4" plexi cover since it's only 6" wide and I use mine with A/C gauges and my vacuum pump. I use a transmission clutch pack piston seal under the plexi. I've been using mine for 20yrs to prime my lifters with oil when rebuilding engines. just fill with oil and a set of lifters, turn it on over night and watch the bubbles come out of the lifters, sure beats pumping them by hand until they fill up.
I got my vacuum pump free. A friend asked me if I wanted it because he couldn't get it to air up his bike tires. I never did tell him what it really was.
That's a great idea!!
Great teaching! I was totally engaged even though I was only picking up parts of what you were saying 😅 I am wanting to try this out with a 20qt stock pot to vacuum seal bbq, sauces, etc. the way a VacMaster would. Do you have suggestions on a simpler way to add air into the chamber before removing the lid? Also I love that this is simple to make- but how idiot proof is it😅
You have the best music
tiny somewhat inconsequential tip that may have been mentioned 246 times already, but still helps the algorithm -
disengage the vacuum pump before turning it on, it starts easily that way.
now we're talkin 👍
So the yellow hose attaches back to the pressure gauges?
Nice. I wonder how it would do with molds/heat in metal casting? You just solved my issues finding a new gasket for my Still. To make...Hand Sanitizer, of course.
not sure but i plan to use it degassing investment plaster for casting. and of course, hand sanitizer is pretty important these days, need a constant supply 😂👍
@@PaulsGarage Yeah, rethinking it I would likely want some sot of compression to push the mtal in tight versus a vaccuum. Gue3ss I will stick with my electric lawnmower engine centrifuge.
Best, cheapest, and easiest by far is a pressure cooker for sure.. i took an old one and braised a copper pipe where the pressure valve was and voila.. used it for distillation and some vacuum epoxy things..
Building an NIR Spectrometer and need a simple vacuum chamber for removing sample contaminants from spectral readings. May design the outer housing like this pump and integrate the inner sensory housing to fit inside with samples of various spectra.
Good luck!
For my low volume, high vacuum source for a vacuum former. I used a 12 volt tire pump and a 400 cubic inch pvc plumbing pipe. I can pull almost 29 hours at 700 foot altitude. I now live at about 1400 ft so the gauge shows almost 28 hg. Converting a pump to pull a vacuum is cheaper than buying a vacuum pump.
nice build. I made one out of 1/2 inch polycarbonate a few years ago. Works great, but I wish I realised how easy the plastic can pick up scratches 😭
Well, the polycarbonate sheet is only there for its strength, right? So, some form of hard coating or film might help.
Yeah it's easier to scratch but I'm tolerant of stuff getting ugly 🤣
Any of those vacuum pumps will work. Even small ones (1.2cfm).
Higher cfm's just pull faster but not necessarily deeper.
Good video. If i don't have vacuum pump, Can i use refrigerator compressor? It will work like with vacuum pump ?
Yes it will!
Maybe try replacing the capacitor in the pump motor
Thanks mate. The lid is just over the pot? It is not fixed/screwed in? I understand that vacuum will basically make the lid sucked in, but that also mean that the seal should be super good.
Not fixed at all, just set on. Sometimes I gotta hold it down at first so it starts ok, then I just let go and let the vacuum do all the work
Well done.
Signed in just to subscribe and comment that.
And this: You should be have more views. Well put together video, in my non-professional you-toob viewing experience.
Good luck!
Thank you! I appreciate it. I don't make broad appealing content, I'm not worried about it lol
So I have a question. If, in theory, I were to rest the lid of the vacuum chamber you made upside down, and cover it with a layer of rockwool insulation, would that be enough to not only protect the polycarbonate from the heat of a freshly burned out lost wax mold, but also would it still be able to pull the liquid metal through not only the solid investment but also through the rockwool?
I was sent the hvac kit by mistake, sender said keep it. So maybe I’ll get to use it now.
If you have compressed air tools, HF's $17 Vacuum pump works pretty good for the cost, but I never tried something as large as that pot.
That looks pretty cool, didn't know they had one that cheap
Another fun thing about vacuum chambers, even if it doesn't leak it will still eventually regain pressure. The materials the chamber itself is made of will offgas and raise the pressure over time.
Makes sense, I'm sure the silicone will off gas quite a bit over time. It definitely has a smell to it
@@PaulsGarage If you wanted really high-end seals you could get a 10" Viton seal or something but that probably costs hundreds of bucks. I don't think ultra-vacuum grade stuff is necessary for this. A decent new rotary vacuum pump will get you well below 0.1 mBar which should be good enough for pretty much anything including freeze drying strawberries.
I used to do lab work with high vacuum. Everything that went in the vacuum tank had to be made of metal or very specific low-offgas plastics, and cleaned off with acetone, and then the acetone residue cleaned of with methanol. Any openings were sealed with steel caps and copper gaskets and the whole contraption wrapped in resistive heat tape to bake off any left over grease from the inside once you had vacuum. And you had to make damn sure there were no screws in blind holes in any equipment that went inside the chamber, which would create slow leaking air pockets. I drilled a lot of little relief holes to prevent that.
Needless to say, you don't need any of that for vacuum forming or getting bubbles out of plaster or anything like that.
Hey pal buddy the yellow line goes pump, but this is great and I am ordering the stuff now
I have a plan for the extra hoses 😉
I am using a Harbor Freight paint pot, it sells for $99.99 and comes with a pressure meter and gasket.
Ok question, if you got an old pressure cooker that nobody cares about could you make a pressure pot by drilling holes and gauging a line in from a compressor? or would the locking mechanism be to weak on the pot lid?
Excellent question, I suppose it depends on the pressure capabilities of the pressure cooker? I was thinking about trying exactly what you said, but it depends on what kind of pressures you need and how overbuilt the pot is. Pressure is way more dangerous than vacuum, so be careful whatever you do.
Why didn't you use the lid for the pressure cooker pot?
its not as easy to convert to vacuum from pressure. The seal is designed to hold pressure in, not out, and there are no good fittings that I could attach easily. plus the clear sheet is clear, so i can see the bubbles which is important, and now i can always stick the old lid back on and use it as a pressure cooker again!
I wonder if I could just rent a vacuum pump and set of gauges from Autozone or something for the one-off days that I need to use it since that is the most expensive part of the system. Just gotta make sure the sizes match I guess
Lolol that's actually a good idea if they let that get rented!
@@tjjones-xj7kq I actually tried it and I was able to rent it for free no problem
Hey the same guy I learned how to make aluminum bronze from!
That was a while ago! I might have to update that with more info I think
@Paul's Garage that would be brilliant, I'm not kidding. I messed that up big time, but I ended up just using brass, but I really want to make an aluminum bronze hammer for my dad the stuff I got was more brown than anything else once it was in the air fir a while unless that's normal?
I need to vac butane out of something. Will this work?
The pump and gauges definitely, but I think I'd use an actual recovery tank set up.
how long does it take to boil let's say 500ml of water ?
I'm thinking of building such a setup for making dry extracts.
not sure, it would depend on how good your pump is. This pump is pretty good but also very worn out. It could do it but i imagine it would take ages to boil away all the water
@@PaulsGarage i mean if it can do it in less than half a day i'd be happy tbh.
Parts List:
Suspiciously Cheap Pump and Gauge kit (and more): amzn.to/3YSxhzo
Pump More equivalent to what I used: amzn.to/3EA4p6O
Just gauges: amzn.to/3IPABG3
Polycarbonate Sheet: amzn.to/3ZdM7jN
Silicone Sheet: amzn.to/3xQb3SW
Tap and Drill set: amzn.to/3XV7O71 (measure yours first, make sure it's the right size/thread)
*amazon affiliate links*
Want to learn sand casting using your 3D printer? I can teach you!: paulsmakeracademy.mykajabi.com/joinus
I have vivohome's 100w 1750G air pumps. It is very loud and definitely not as powerful as they claim. It is solid, though , I've been using it for over a year on my co2 laser. I'd say expect about 75% of the claimed performance.
Is that why it's suspiciously cheap? Lol
@Paul's Garage well, all of their stuff is on the cheaper side, they are mass produced and most likely not calibrated. But out of all the pumps I bought of the same design from other companies, theirs was the closest to spec and has not burnt my house down yet lol. Considering it's mass-produced from seas it's actually more on the expensive side for 4cfm
Spring is here, time to check out garage sales for pressure cookers. I expect most of them would be in pristine condition.
Mine certainly is! Used maybe twice ever
Question... I'm considering making my own vacuum chamber using commercial grade water pipe, which I've yet to obtain. I'm thinking between 10"-16" in diameter and 10"-12" (maybe a tad longer) in length... Do you think this is a viable option and what might the risks be? Thanks in advance.
Yeah that would probably work. A vacuum chamber is much easier to make than something like an air compressor tank. the difference between outside and inside pressure can't exceed 1 atmosphere even at a full vacuum (15psi or so), where an air compressor tank can have several atmospheres of air inside. If you are using a large pipe meant to carry water at pressure, it can most likely handle a full vacuum just fine.
thread the fitting that connects to your vacuum pump through a hole drilled in a mason jar lid, seal with hot glue or epoxy.
Why?
5:44 That measurement is called a "snugga-dugga". LOL
My scale is light, medium, and heavy grunt 🤣
@@PaulsGarage Also called "A good gronk". There's also the "Tighten it till you hear a crack, then back a quarter turn" :D
The old "He-man" tight
Be careful not to pull too much water vapor or other solvents into your pump, I think it's because they can condensate into the oil and contaminate it on the ambient pressure end of the pump. Ideally, you put a cold trap between the pot and the pump (but that requires liquid nitrogen).
I am thinking an standard air water and oil separator might work. 🤷♂ Maybe even a cheap filter for paint guns at harbor fright.
@@3Hose Definitely better than nothing in there at all, I agree.
You should get a top open mini freezer and remove the top and make a freeze dryer
that would be cool! but i don't think the freezer liner would hold a vacuum. I would have to put the freezer inside a giant chamber or something. that or the opposite, put the whole vacuum chamber inside the freezer.
I came back to watch this a 2nd time, then I went and priced the Lexan at $36. That's without guages, without valves, without cutting and drilling, no tap, no labor. I was able to find a whole turnkey kit for $114. 5gallon stainless steel chamber with valves and a guage, hose and 5CFM 1/3hp pump. It's normally 130 which is already stupid cheap. The pump will probably break your heart, but we can't all be gifted a Robinair cast iron tank like you got, if you get a spec of foreign matter, water or whatever in the vevor pump, you are doomed, I keep the motors, they are worth something, a paperweight at least. Free shipping from eBay too good for next 6 days. I'm no pro, but that's friggin cheap, I have bought a few and need just a chamber for a vacuum distillation rig, I have a pressure cooker and found a better deal on Lexan, but I'm still tempted by this. I also got a water aspirator pump because I'm sick of killing RV pumps and I'm sick of them belching oil all over everything. Diaphragm pumps have gotten cheaper, but not PTFE diaphragm pumps and if I'm going to do it wrong I'm going to do it cheaply(And I already have several 55psi water pressure pumps. I've seen water boil at 19C using an aspirator which is near 29.3"Hg with no moving parts, no oil changes. I'll put the link in a reply in case it goes away
I’m so glad I watched this first, I would probably have blown myself up somehow…again…
Restaurant supply store will have wider pots, because restaurants have bigger burners.
Good tip!
Just put the yellow hose on the vaccum pump and open the blue knob. Red is obsolete
12mm =~ .473 -> 15/32.
31/64 = .484x.
The reason I can quote those figs from memory is I have *Router Bits* in those sizes, because nominal-size Baltic Birch varies from .465 to .485+ in inch dims. Stuff is nominally 12mm…
I want slots for shelves that give just enough added space for the glue…
Interesting! This lexan sheet was sold as 1/2" but is actually 0.473", must really be a 12mm sheet
31/64’s god i love our measurement system!
I have a *router bit* in that size….
15/32" would probably be better. That's 0.4688" or 11.91mm
31/64" = 0.4844 or 12.30mm
So 15/32" is closer and slightly smaller than 12mm
1/64" = .0156" or .4mm So not quite a half a mm.
Other person: you got the idea from Paul's Garage.
Me: Paul's Garage? Who's that? 😅
People get all precious when I run plaster through my vacuum pump but I really think it’s fine without a cold trap. I doubt I’ll notice that much shorter of a lifespan in the tool since I bought it for degassing plaster and silicone anyways.
Anyway, great video!!! Kind of wish I had done this instead of buying my vacuum chamber. If I ever need another I’ll follow your plans!
As long as one is patient, and has a good seal, the size of the vacuum pump is irrelevant.
Patience and persistence satisfies more than just the ladies.
sounds like a great pickup line. "hey ladies, wanna come and see my persistent vacuum chamber?" I assume they would be very confused and walk away quickly 😂😂
“No that’s not dinner, it’s part of my nuclear fusion reactor. Gotta save money on the electric bill somehow. 🤷🏼♀️”
Hey if I wasn't afraid of irradiating my self I'd be all over that 🤣
You could always give it to me 😂
It's your's for only the cost of shipping! (S&H $499 +TAX)🤣
😂😂👍👍 I Wish you were a teacher! I used to be a chemistry nerd but I decided that rock'n'roll was cooler. Now I begin to regret my choice!
Closest I got to teaching was a few semesters as a TA at a couple universities when I was in graduate school. It was easily the best part of school, had great feedback from the students. Not a SINGLE student was majoring in the subject matter, I had to really work to keep them interested 🤣🤣
I am by far a vaccum pump expert, but when I was shopping for my vaccum chamber I was able to find one with a "Venturi Vacuum Pump" attachment which allows you to use an air compressor if you already own one, at a very fractional price.
Venturis are pretty awesome but I'm not sure what kind of vacuum that would pull. Some for sure but I doubt it would get as deep as a pump
@Paul's Garage I can not remember off the top of my head, and for sure, it's not as good as a true vaccum pump. But it was more than enough for pulling the gasses out of resin and silicone. I never had the need to use it for anything else.
That much? That's pretty impressive, I wouldn't have guessed that
@Paul's Garage of you are purely interested in its capabilities, this is the brand I bought years ago rotokinetics, the 2.5 gallon compressor version. Even now it looks identical, but I think I paid maybe just over 100. Inflation is beautiful 😑
@@PaulsGarage Some British steam locomotives achieved 25 inHg using a venturi.
You might want to replace the start run cap(s) on the vacuum pump. They do have limited life spans.
You need to open the gas ballast on the pump when you turn it on. Then it won't stutter like that.
Awesome thank for the tip! I wondered what was going on there
🤔could use it to vacuum seal Mason jars with food
Why not put the vacuum pump on the yellow hose and use the high side valve to let in air without having to unscrew anything?
Good idea! But I have plans for the yellow hoses, gonna add some more stuff to this set up on the future 👍
why did you use the red hose, the middle hose the usual one used for vacuuming? that way you wouldn't have to bother with the second valve or worry about the yellow hose leaking because it isn't tight enough?
4:00 the only way I know to glue silicone is to prime the silicone first with polyolefin primer and then glue it with cyanoacrylate glue.
Interesting, I didn't know that. I feel like the glue I used is BARELY holding. It's fine thought it doesn't even need to be glued
freeze drying food, is a use too
i never thought about that!
If you don't need a 99%+vacuum, vacuum ejectors are like $40 for 95% vacuum
The festo ones i use have integrated fittings for tubes and even integrated silencers on some models.
Just be aware that you will need a compressed air source. Pretty much anything will do as long as you can regulate the line pressure given how they take 0.6 to 2.5 cfm of air to run.
Yeah admittedly this pump is overkill, but it was free so I took it. Who knows maybe I'll need 50 micron vacuums at some point.
And there's a giant air compressor behind me, so I'm all set on air pressure 👍
@@PaulsGarage i absolutely agree, i have this weird vacuum pump that switches over to liquid mercury by itself past a certain point
It's super fancy but there wasn't any place to put it and the site was being upgraded to a pump that was way faster (2 days for 250 m^2 instead of 8 days for 30m^2).... So i got it.
Paul I think you mean 37/64 atleast that’s the one my tap said it needed for that tap
I'll be honest I wasn't super careful picking out the drill
Its pronunced "Hear See"
Try making a replica of the Flux Capacitor with the Polycarbonate. 😂
Lol and I thought you were going to build the pump out of homemade parts too!
Lol that doesn't sound very easy! VOGman built a pump. It's a manual pump with 2 one way valves. It works surprisingly well but he's not getting to the same level of vacuum with that one
I want to know your wife's TH-cam ID and read her comments under your videos. If she has half the dry sense of humour you do it'd be like icing on the cake and hilarious :-)
Lol she doesn't usually comment on TH-cam unfortunately. Maybe I'll try to get her into more videos
Surprice: That Robinair is not that old maybe 1990s vintage, which in Vac pumps is quite young, because the parts are constantly bathed in oil during operation.
Really? I thought it was 80's maybe? I'm not sure though. It's been stuck in a corner of the shop for 20+ years at any rate
@@PaulsGarage I'm pretty sure. But those things don't really experience stress under load. In another life, I ran the mechanical facilities for an ultra high vacuum research lab in a university. So I've seen my share of vacuum pumps.
fun fact: "Finger Tight" is roughly 3-5 in*lbs! (using at most three fingers, usually the thumb, pointer, and middle finger. And only on items up to roughly 1")
I didn't know that, thanks!
Use a refrigerator compressor. They do vacuum and 300psi. It works better for cheap projects than an expensive pump does
They are pretty nice, but they don't move enough air or pull a deep enough vacuum for my plans here. It works fine for a small chamber like I built here, but there are bigger plans coming for this 👍
@@PaulsGarage I've had them do 27 mercury which is a rather good vacuum.
I've used it to make vacuum tubes that held water, and would boil when you held them. Freeze water in a long/slender tube, draw vacuum, then seal. It's a fun experiment 😉
Yeah that's pretty good, how long did it take and what size chamber?
That sounds really awesome! Cool idea
Easy means lazy?
No no no... lazy means efficient.
I don't think I need a vacuum pump, but I want one. So I will have to make up a reason to make one.
If you want one I'm sure that counts as a need 😂
@@PaulsGarage Thanks Paul, I will blame you.
If you're not going to use a vacuum pump often don't buy one. O'Reilly Auto Parts and AutoZone both have them to borrow. You pay for the pump, but you just return it within 48 hours to get your money back. No oil maintenance, dry rotted seals, or failures to worry about.
Interesting I didn't know that. I got this one for free so I'm not complaining lol
Polycarbonat is the same stuff those police riot shields are made out of, it´s crazy good stuff.