Wow, just stumbled upon your video and hey man AWESOME.I hav'nt seen this level clarity in instruction for some time! I tried to this idea together a year or so ago and failed a couple times. I still have the parts around somewhere here, I am going to try this again, Good Job
You do NOT have to remove the gage and hose with the tire valve.Just epoxy on the brass fittings as you did and be done,and you can still use it as an air compressor too!To use the vacuum,just attach a slip fit hose on the brass intake,or leave it off and use the compressor side as usual.
Yes, I thought I'd do this too, but when I opened it up it turned out there was no "inlet port", it seems to suck air in through "the back", ie where the crank rod goes into the "piston". Something you can't tell til you've got it home and taken it apart. And the outer plastic case looked identical, so there is no clue whether you are going to get a modifiable one or not.
Thanks for a nice clear video with the tedious bits speeded up. I applaud you for including the cock-ups too: the third bolt problem and the over tightening of the cylinder head. That's proper making.... snags & all. a couple of comments: 1. Why use a brass nipple at all? a short length of tube wouldn't have fouled the screw, the casing would have been easier to drill out and there would be no rotational force on that epoxy. W
You will not get an efficient vacuum, until you reverse the piston disc. the disc is curved up to trap air and push it out, as well as provide low resistance when going down. Just invert the disc so the it curves down. that way you will have a high suction.
Very clear presentation of a useful tool in a home laboratory or workshop. Nicely done. Only one tiny suggestion: a meter to measure the extent of the vacuum that the pump can produce.
I have a similar compressor and even I'm not sure if I going to do this project.. but thank you anyway because I was always wondering about the mechanism in it, but i didn't have mood to open it
Wenn ich sehe wie du da rumwurstelst, richtig schön. Da bin ich nun nicht mehr alleine. Gutes Video. When I see you messing around there, really nice. I am no longer alone. Good video.☺
Thanks..I had seen earlier Vedio on same topic.. whereby compressor was put in a jar...n tubing n cycle valves..vaccum was created on one side and compressed air on other side...have you removed that Vedio of yours.. please reply
it works fine. did the same after watching many people changing the compressor. my conclusion was that it was not needed and just do it the way you did. it works fine and mine will go 0.6 bar under atmospheric pressure. i only left the pressure outlet in tact too. so it is still a compressor that will fill tires and i can also use it to suck air out things
Is there an express reason why you didn't weld or solder the intake rather than glue it with epoxy? Was it just more affordable or were there concerns about damaging the pump?
Good idea ! But you should have use micro bore fittings, they would have fitted perfek ;) These pumps are 12V, it will work better with the power it was designed for !
8:50 I was thinking you could have soldered the pipe into place to make an airtight seal and maybe gone over the top of the solder with the epoxy resin for extra stability. Anyways in quarter of the way in to the video, I shall Cotinue to watch and see how this turns out. 👍
I sincerely hope You had all Your safety gear on during this rather hazardous process? It is so easy to get hurt or blow up something, working with Q-tips, rubber bands and 3 mm screws!
For hand-made chemical vacuum pump be better to use the vacuum pump from the "doors central looking system", from old Mercedes/Audi/WV (All parts from clear carbon, strong vacuum - this most like for chemical using) +1 for this video
very good job, thanks for sharing your knowledge. as a contribution, it would be simple to get it to do the two functions, pressure and vacuum in the same pump, I think it would be very useful to have both options. Best regards from Spain. 😉
How would one do that, I'm trying to do the same thing? I also want to attach a filter to it. This will be used to filter out metal filings so they don't go into my engines when working on cars. Any ideas on how I can create a system like this?
He said you didnt really need to modify it just attach something to the intake. Keep the hose attach a smaller one for your vac line and boom there you go
Is it possible to just use some strong flexible tubing (maybe durable silicone hose), sealed well to the intake valve instead of having a metal adapter? For my purposes, I’m wanting to pull the vacuum through a flexible hose anyhow - so why not skip the whole complicated adapter altogether? **(I’m sure there’s plenty I’m not taking into account here, being that I’m as novice as one gets with this... **_but_** I’d love if someone could enlighten me here!)** 🆘🧠💭!! 😂 I’m wondering, anyway, if rather than having to go through fitting that metal adapter, only to then have to worry about the additional connection, between that adapter and then the hose - might it be better to simply run the hose (assuming it’s durable/strong(etc) enough) straight from the air intake valve? Curious. I hope someone can educate me a bit here!🤞 If it could be simplified even further this way, I have a real shot at executing this! Lol
I have a 3HP compressor which still runs but it got a small leak. It is not one of those oil free ones. I swear that thing would run forever if it didn't have a leak. I might be able to use it as a vacuum and just take the pressure hose off it
Hi can we use or convert uniweld's 2 stage vacuum pump into any type of water extractor from the tank, really helpful for me if you please answer or by any chance make a video, thanks a lot
You actually don't have to seal this, because the air you suck in, must also be pushed out somewhere. It works like a regular vacuum pump with two openings, one for sucking air in and one for pushing it out.
@@chemx8591 I was wondering too about that tube left cut opened, and here you confirm the very important role of that tube to expel the air sucked , so thank you very much : you are a genius, I advice you to stress the importance of that cut tube because in your video explanation gives the impression that it is useless whereas is the contrary. All the newbies like me will thank you.
Nice thing, I had the same Idea and your Video explains everything, what I needed to know. Just don't see the reason why cut of the Tube and removed the PSI-meter, as It would still have been usable as a regular compressor too. Btw. I am not going to use it as Vacuum pump, but to compress Gasses, like H2 and O2 into tanks, Like Cody did on Cody's lab, just without the trouble of having to capsule the whole thing into a bottle, like he did it. Therefore this mini-compressor seems to be the cheapest solution.
will hair clipper/trimmer oil work to keep it to have long life??? on gears and piston walls and such?? a lot of ppl recommend sewing machine oil but i use hair clipper/trimmer oil on everything and it lasts for years.. including my bike.. loosened it up and got the chain going smooth like butter.
ChemX I tried using some and it instantly started speeding up to about 10-20% smoother running as well.. But my compressor also makes a smacking/clanging noise as well although not as bad as in your video. My other air compressor that i have is working a bit smoother and has a higher flow rate of air but lower maximum pressure. Crazy how these cheap things can go to a max of 250-300PSI. Mine goes a little further than 250. I'm guessing the red area really means dont stay at this pressure for long even though it can handle it.. I used way too much HCO but it should be fine. im guessing the excess will not matter as long as it doesnt get into the motor brushes (yuck lol) it sounds a lot smoother now though.. I did it on both air compressors.. I have 2 of them. one makes the knocking sound slightly but the other one doesnt.. Also noticed there is a bit of air coming out of the little "hole" you found. on every pressure strick it exhausts a bit of air back out the intake. Mine must be slightly defective but it does manage to get up to its maximum rating (and a tiny bit further but i never really tried because i dont wanna ruin the gauge)
Hi. I have a question about the amperage of the compressor. You sad that it will work with more than 3A. I want to buy some adapter to run it in the house, but I can't find a more powerfull one then a 2A adapter. It will run with 2A too? Do I risk burning the adapter? Or any other risks?
Actually it takes 3 Amperes on 7 Volts. Ushually it runs with 12 Volts. So i Expect, its taking even more than 3 amps running on 12 Volt and i'm pretty shure with that, because that size of motor is a little too big for just taking 3 amps on nominal voltage.
I think a hand pump might be more efficient! I have a "car" similar electric pump, and it couldn't even inflate a kid inflated mattress... seeing the suction of his finger, seems not powerful... but the idea is great!
Same here, I'd like to know, I see these little car-shop compressors everywhere here. Looks like it's great for Buchner filtration, but somehow I doubt it can run hours on end for vacuum distillation. Maybe you need a bigger and sturdier AC model of compressor for that? It would still beat the insane price for an airco-type diaphragm vacuum pump, let alone a labware type one, or a rotary vane vac pump. I have managed to perform an incredibly slow 14-hour vacuum fractional distillation once (flask used was too big + I didn't isolate the Vigreux against massive heat loss) and my refrigerator-compressor-turned-vac-pump took it like a pro, it did need constant fan cooling though. Still 30 mmHg wasn't too shabby for something I salvaged from the junk yard, about the same as a water aspirator on full blast.
I think starting with a better air compressor would definitely help. I bought the cheapest one I could find as a proof of concept and it worked out alright, a better one would of course be an improvement. The main problem with vacuum distillations and this pump is that these little compressors aren´t built to last. I doubt the gears would survive anything near a 14 hour distillation. NurdRage did a pretty good video on a budget vacuum distillation setup, which also eliminates the need of a trap which otherwise would be mandatory.
Did the cylinder get smaller because you glued on a hose fitting on the cylinderhead? No. You just over tightened the bolts. Solution: back of the bolts a bit.
Of course I tried loosening the bolts a little bit.......... The pump was already faulty before I modified it (you could hear a noise everytime the piston was on the top of the stroke), but I didn't really pay attention to it. Thanks for you expertise anyway ^^
I think filing down the attachment only to have to glue it in place isn't well thought out. I would of drilled out the hole a bit so that the fit was exact.
Enough to suck ALL of the gasses out of the resin around a home made HT transformer, even though it is a bit on the slow side, it does get the job done. But as a compressor? It might be just enough for airbrush purposes, but I am not interested in that. Instead I have been using a slightly modified fridge compressor both as a vacuum pump And as a compressor to inflate tires with. If you can make stuff yourself, you eliminate the need to depend on shitty, overpriced tech. So you save some of that nasty money for when you might really need it. And, the real bonus here is the experience gained whilst repurposing what is seen by most people as 'trash'. Consequently it strengthens self confidence, knowing that you are able to 'think (and tinker) out of the box'. All are tiny steps towards becoming the maker of once own path. But it will also inadvertently lead to learning more about the truths of our modern so-called-ciety, which can be quite life-altering at times. It is NEVER a bad thing to learn stuff....whatever it may be!!
That's correct in theory, but the valves on this cheap little pump are not separate or simply reconfigurable for direction...they are integral to the cylinder heafd casting, so your "all-you-gotta-do-is-solution" is practically impossible...are you in manager school?...just asking...
Im a hobbyist have and old air compressor very small. To turn my in to vacuum pump. Probably wouldn't be as ha4d to do. Except to change out the intake ? Probably in that order. But this be good idea!
If you gouge off the thin metal that crimps the original hose in place, the hose comes right off and reveals a hose-tail... of no practical value, but looks a little nicer.
Shona O'Neill Can I ask why? seems to me like better idea than epoxy because of stronger bonding (at least I think two soldered metals will make better bond than epoxied (not stronger thou... but seal would be better, at least in my head))
I'm sure it will work with soldering too, but it's going to be a lot of extra work. You have to disassemble the hole cylinder head to remove all rubber parts and then you'd have to put it all back together. If I were you, I would simply use epoxy, since it also creates a very strong bond and is overall easier to use.
I assume that you're going to be using this for vacuum filtration. I'm looking at making a vacuum chamber for degassing silicone rubber and resins. I wonder if it would be good enough for that. Sadly, I don't have a vacuum gauge AND all that "Torr" and "Bar" stuff still confuses me... time for some reading, I think. Are there any amateur classical physicists in the audience?
reverse the motor? The piston inside goes up and down, if you reverse the dc motor the piston will go.... erm...up and down. The best solution is to put the non-return flap valve on the other pipe but from an engineering point of view this looks pretty tricky. This isn't a bad solution but similar size pumps set up for vac are very cheap on ebay. But hey! Where's the fun if you can't make ?!
No. Air is compressible, liquid is not. This compressor would definitely not be able to handle the added pressure. Even if it could create enough vacuum to lift the weight of the liquid it would likely blow the cylinder apart. better to use a manual suction pump to evacuate liquid. Something designed for the purpose.
Good work . I think you could have kept that one long screw in place all the way through. But perhaps it is more convenient to do it the way you did :)
i restored a Hilti 150-U core rig, the stand has a base that seals down with vacuum pressure, im not buying one from Hilti they over price them,,i have about $800.00 in the core drill & stand,,they sell for 6-grand new including the water vacuum so the compressor conversion that you did should work on a small RYOBI i have & Hilti wont drain my pocket! (thankx-CX)
If you could change the polarity of the motor, you wouldn't have to work so hard and you would just convert air pump to a vacuum pump in the same fitting.
Incorrect. The intake and outlet have "check valves" which only allow air to flow in one direction. Reversing the direction of the crank will not make it suck instead of blow because the check valves are controlling the direction of the air flow.
@@mitchd949 or to think about it another way, the crank converts the motor round-and-round motion to up-and-down of the piston. If you ran the motor backwards, the piston wouldn't even notice anything had changed, it would still just go up-and-down.
I will ^^ Currrently I don't have a vacuum gauge, but I want to do a test with a hose and some water. I'll tell you the results once I get around to it.
+goonygoogoo2 That won't work. It will of course reverse the DC motor direction but since the motor just swings the piston up and down anyway, it won't make a difference. Also, as stated in the video, there are two one-way valves that make sure the air flows in only *one* direction, so that makes two reasons why inverting the polarity won't work. There are only two ways to turn this pump into a vacuum pump: reverse the valves or use the pump's air intake as the source of vacuum, which was what he did in the video.
The instructions for the original pump said to only run it for 10 minutes continuosly. I think that sounds about right since the pump does get quite hot.
If by q I intend to use it as a pump for several aquaria like aria in that case and how to convert it into 12 volts but noc how to make it last connected for longer or indefinite
I wanted to create a vacuum chamber and this might work. I realized I have an old air compressor like this I never use, because I have an 80 gallon one. I should try this, it is free!? Almost!
The best conversion of a 12v pump to vacuum pump I have seen. Thank you! I will give this a go this weekend ☺️
Wow, just stumbled upon your video and hey man AWESOME.I hav'nt seen this level clarity in instruction for some time! I tried to this idea together a year or so ago and failed a couple times. I still have the parts around somewhere here, I am going to try this again, Good Job
You do NOT have to remove the gage and hose with the tire valve.Just epoxy on the brass fittings as you did and be done,and you can still use it as an air compressor too!To use the vacuum,just attach a slip fit hose on the brass intake,or leave it off and use the compressor side as usual.
Of course you could do that, but I don´t need a compressor and thats why I removed the hose.
Bowtie41 get err dun! More time to drink my corn juice and fuck the chickens. Merica, fuck yea!
...then you have to to fuck around to release the pressure instead of it just blowing it out
@@rickyclark2659 fuckery lol
@@rickyclark2659 That is not how those air pumps work.
thanks for this video but what is the ultimate negative vacuum guage measurements
Hi thanks for sharing, how many psi delivery your compressor? Thanks again!
Excellent job, i asume if i get a tap and cut a thread maybe I can screw a pipe instead of epoxy resine glue.
Yes, I thought I'd do this too, but when I opened it up it turned out there was no "inlet port", it seems to suck air in through "the back", ie where the crank rod goes into the "piston". Something you can't tell til you've got it home and taken it apart. And the outer plastic case looked identical, so there is no clue whether you are going to get a modifiable one or not.
Thanks for a nice clear video with the tedious bits speeded up. I applaud you for including the cock-ups too: the third bolt problem and the over tightening of the cylinder head. That's proper making.... snags & all.
a couple of comments: 1. Why use a brass nipple at all? a short length of tube wouldn't have fouled the screw, the casing would have been easier to drill out and there would be no rotational force on that epoxy.
W
Just want to say, with the way that piston is made the seal on it won't let it draw much of a vacuum.
All in all, an excellent DIY video. Thank you!!
yeah whats the ultimate vacuum you got it would be interesting to see the gauge needle showing the vacuum Thanks for this video
Pretty slick. Seems easy enough. Might take a couple of days of fiddling to put it all together.
You will not get an efficient vacuum, until you reverse the piston disc. the disc is curved up to trap air and push it out, as well as provide low resistance when going down. Just invert the disc so the it curves down. that way you will have a high suction.
sounds logical, but I can't imagine how to
Very clear presentation of a useful tool in a home laboratory or workshop. Nicely done.
Only one tiny suggestion: a meter to measure the extent of the vacuum that the pump can produce.
I have a similar compressor and even I'm not sure if I going to do this project.. but thank you anyway because I was always wondering about the mechanism in it, but i didn't have mood to open it
Could you not reverse polarities of contact wires
Lastly... things like this are the perfect reason why everyone should own a rotary tool (Dremel type).
Such russians don’t able to buy dremel. They even don’t know what is it.
Stalin killed last ones who know how to use it
@@tvnsi8556 I make now comrade.
Then we can... how do American say it... "Make Sex on Face Always"?
Isopropyl alcohol is a good general purpose cleaner and removes wet epoxy easily. More pleasant to use than acetone too
Wenn ich sehe wie du da rumwurstelst, richtig schön. Da bin ich nun nicht mehr alleine.
Gutes Video.
When I see you messing around there, really nice. I am no longer alone.
Good video.☺
Unfortunately not every tyre pump is the same, I had one with the intake valve in the top of the piston. What a bummer.
Thanks..I had seen earlier Vedio on same topic.. whereby compressor was put in a jar...n tubing n cycle valves..vaccum was created on one side and compressed air on other side...have you removed that Vedio of yours.. please reply
why don't you solder the socket rather than epoxy !!!!!! Any problem you see in this suggestion ?
thanks for the video do you know what is the vacuum power in bar ?
You find the answer
Your experiment can solve the problem of vacuuming refrigeration beginners.
would it not have been simpler & better to just reverse the flap valves...& use the outlet & its hose for the vacuum line :-?
ya I thought the same but maybe the screw layout doesn't let you put it on reverse or maybe he needs to be able to access both sides.
it works fine. did the same after watching many people changing the compressor. my conclusion was that it was not needed and just do it the way you did. it works fine and mine will go 0.6 bar under atmospheric pressure. i only left the pressure outlet in tact too. so it is still a compressor that will fill tires and i can also use it to suck air out things
Is there an express reason why you didn't weld or solder the intake rather than glue it with epoxy? Was it just more affordable or were there concerns about damaging the pump?
Because it's cast aluminium
And the heat would damage the rubber seal below?
As there doesn't seem to be any check valve.. wouldn't just reversing the polarity would have done it?
No. It would just turn the motor in the opposite direction. The action of the piston would be unchanged.
Good idea ! But you should have use micro bore fittings, they would have fitted perfek ;)
These pumps are 12V, it will work better with the power it was designed for !
Excellent video, thank you very much for making
8:50 I was thinking you could have soldered the pipe into place to make an airtight seal and maybe gone over the top of the solder with the epoxy resin for extra stability. Anyways in quarter of the way in to the video, I shall Cotinue to watch and see how this turns out. 👍
could i use that method to extract oil from a car or would the oil damage the seals and/or piston?
How many inches in mercury and microns can it pull? Curious might make one for automobiles.
10:59 min....and it was at this moment he realized he had f up. LOL
í had the same feeling 🤗🤣😁😂
@@ASHORSHEMAYA ,,it seems like a lot of work,just to deflate his girlfriend?😁😁😁
I sincerely hope You had all Your safety gear on during this rather hazardous process? It is so easy to get hurt or blow up something, working with Q-tips, rubber bands and 3 mm screws!
7:22 you can remove unset epoxy from your fingers using alcohol. In case you don't want to wear gloves.
For hand-made chemical vacuum pump be better to use the vacuum pump from the "doors central looking system", from old Mercedes/Audi/WV
(All parts from clear carbon, strong vacuum - this most like for chemical using)
+1 for this video
I'm truly impressed. Your suggestion is very good. I expect I will have to try to build using one of these pumps some day soon
Why not just put the screws in first then line the cylinder up?
great idea,am gonna try this for a desoldering iron,thanks!
very good job, thanks for sharing your knowledge. as a contribution, it would be simple to get it to do the two functions, pressure and vacuum in the same pump, I think it would be very useful to have both options. Best regards from Spain.
😉
How would one do that, I'm trying to do the same thing? I also want to attach a filter to it. This will be used to filter out metal filings so they don't go into my engines when working on cars. Any ideas on how I can create a system like this?
He said you didnt really need to modify it just attach something to the intake. Keep the hose attach a smaller one for your vac line and boom there you go
How well do you think this would work to suck out the oil in a push mower?
Well you would have to build some sort of catch can for the oil, since the pump can only pump air. Other than that, I don't see a problem.
My Idea is to put the whole pump in a Case and make some insulation wool between for more silence and some holes. Have to try it on my own.
Hi get car tire valve valve and insert it where you normally would pump . Makes pump duel purpose
Is it possible to just use some strong flexible tubing (maybe durable silicone hose), sealed well to the intake valve instead of having a metal adapter?
For my purposes, I’m wanting to pull the vacuum through a flexible hose anyhow - so why not skip the whole complicated adapter altogether?
**(I’m sure there’s plenty I’m not taking into account here, being that I’m as novice as one gets with this... **_but_** I’d love if someone could enlighten me here!)**
🆘🧠💭!! 😂 I’m wondering, anyway, if rather than having to go through fitting that metal adapter, only to then have to worry about the additional connection, between that adapter and then the hose - might it be better to simply run the hose (assuming it’s durable/strong(etc) enough) straight from the air intake valve?
Curious. I hope someone can educate me a bit here!🤞 If it could be simplified even further this way, I have a real shot at executing this! Lol
Why did you not put the front screw in first?
I have a 3HP compressor which still runs but it got a small leak. It is not one of those oil free ones. I swear that thing would run forever if it didn't have a leak. I might be able to use it as a vacuum and just take the pressure hose off it
Can this be used to suck refrigerant out of a fridge? Thanks.
What if i debourgh that intake hole 4:20 and then first solder the connector and then some epoxy ?.. i will try that if i ever come that far,,
i rarely get by the 420 bit, hehehe
great video . exactly what i needed and very clearly explained
Hi can we use or convert uniweld's 2 stage vacuum pump into any type of water extractor from the tank, really helpful for me if you please answer or by any chance make a video, thanks a lot
What was the lowest pressure you could obtain using this setup?
I'd also like to know
Lajos Winkler uuju
i want to know more.
It would be about zero, I presume. Beyond that, it's called vacuum...
how do you seal where the hose and gauge were???
You actually don't have to seal this, because the air you suck in, must also be pushed out somewhere. It works like a regular vacuum pump with two openings, one for sucking air in and one for pushing it out.
@@chemx8591 I was wondering too about that tube left cut opened, and here you confirm the very important role of that tube to expel the air sucked , so thank you very much : you are a genius, I advice you to stress the importance of that cut tube because in your video explanation gives the impression that it is useless whereas is the contrary. All the newbies like me will thank you.
i have 2 compressors iv looked at both and cant find the intakes there are no holes and it bugs me :/
Nice thing, I had the same Idea and your Video explains everything, what I needed to know. Just don't see the reason why cut of the Tube and removed the PSI-meter, as It would still have been usable as a regular compressor too.
Btw. I am not going to use it as Vacuum pump, but to compress Gasses, like H2 and O2 into tanks, Like Cody did on Cody's lab, just without the trouble of having to capsule the whole thing into a bottle, like he did it. Therefore this mini-compressor seems to be the cheapest solution.
Can you not just reverse the polarity of the motor and delete the one way valve?
No, the polarity of the motor has nothing to do with it. You would have to reverse both one-way valves.
so every contaminant particles will enter the greasy piston?
Nice desk vice.
will hair clipper/trimmer oil work to keep it to have long life??? on gears and piston walls and such??
a lot of ppl recommend sewing machine oil but i use hair clipper/trimmer oil on everything and it lasts for years.. including my bike.. loosened it up and got the chain going smooth like butter.
I think you could definitely use hair clipper oil.
ChemX I tried using some and it instantly started speeding up to about 10-20% smoother running as well.. But my compressor also makes a smacking/clanging noise as well although not as bad as in your video.
My other air compressor that i have is working a bit smoother and has a higher flow rate of air but lower maximum pressure.
Crazy how these cheap things can go to a max of 250-300PSI. Mine goes a little further than 250. I'm guessing the red area really means dont stay at this pressure for long even though it can handle it.. I used way too much HCO but it should be fine. im guessing the excess will not matter as long as it doesnt get into the motor brushes (yuck lol)
it sounds a lot smoother now though.. I did it on both air compressors.. I have 2 of them. one makes the knocking sound slightly but the other one doesnt.. Also noticed there is a bit of air coming out of the little "hole" you found. on every pressure strick it exhausts a bit of air back out the intake. Mine must be slightly defective but it does manage to get up to its maximum rating
(and a tiny bit further but i never really tried because i dont wanna ruin the gauge)
can't you flip the electric wires on the motor to run it in reverse?
No, the direction of the lamellar valves would stay the same and with them the direction of the air flow also.
You can also make 134A refrigeration system off these easy but they don't last to long only a few days lol
What do you mean +Ronald Brown? :)
What kind of vacuum can You manage to get?
you should tight the screws togather to make balance, but good job
Great explanation 👍
Hi.
I have a question about the amperage of the compressor. You sad that it will work with more than 3A. I want to buy some adapter to run it in the house, but I can't find a more powerfull one then a 2A adapter. It will run with 2A too? Do I risk burning the adapter? Or any other risks?
Actually it takes 3 Amperes on 7 Volts.
Ushually it runs with 12 Volts.
So i Expect, its taking even more than 3 amps running on 12 Volt and i'm pretty shure with that, because that size of motor is a little too big for just taking 3 amps on nominal voltage.
Super idea great going
Hey man, is it a good idea but I have one ask, what maximum vaccum pressure measurement your obtained?
I think a hand pump might be more efficient! I have a "car" similar electric pump, and it couldn't even inflate a kid inflated mattress... seeing the suction of his finger, seems not powerful... but the idea is great!
Nice. Thanks for answer!
yes I need to know how much vacuum you can pull on this compressor, Please.
Same here, I'd like to know, I see these little car-shop compressors everywhere here. Looks like it's great for Buchner filtration, but somehow I doubt it can run hours on end for vacuum distillation. Maybe you need a bigger and sturdier AC model of compressor for that? It would still beat the insane price for an airco-type diaphragm vacuum pump, let alone a labware type one, or a rotary vane vac pump. I have managed to perform an incredibly slow 14-hour vacuum fractional distillation once (flask used was too big + I didn't isolate the Vigreux against massive heat loss) and my refrigerator-compressor-turned-vac-pump took it like a pro, it did need constant fan cooling though. Still 30 mmHg wasn't too shabby for something I salvaged from the junk yard, about the same as a water aspirator on full blast.
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I think starting with a better air compressor would definitely help. I bought the cheapest one I could find as a proof of concept and it worked out alright, a better one would of course be an improvement.
The main problem with vacuum distillations and this pump is that these little compressors aren´t built to last. I doubt the gears would survive anything near a 14 hour distillation.
NurdRage did a pretty good video on a budget vacuum distillation setup, which also eliminates the need of a trap which otherwise would be mandatory.
Did the cylinder get smaller because you glued on a hose fitting on the cylinderhead? No. You just over tightened the bolts. Solution: back of the bolts a bit.
Of course I tried loosening the bolts a little bit..........
The pump was already faulty before I modified it (you could hear a noise everytime the piston was on the top of the stroke), but I didn't really pay attention to it. Thanks for you expertise anyway ^^
I think filing down the attachment only to have to glue it in place isn't well thought out. I would of drilled out the hole a bit so that the fit was exact.
Hello, how are you??? Please, do you know how small pressure do you achive??? Thank you!
Enough to suck ALL of the gasses out of the resin around a home made HT transformer, even though it is a bit on the slow side, it does get the job done.
But as a compressor? It might be just enough for airbrush purposes, but I am not interested in that.
Instead I have been using a slightly modified fridge compressor both as a vacuum pump And as a compressor to inflate tires with.
If you can make stuff yourself, you eliminate the need to depend on shitty, overpriced tech. So you save some of that nasty money for when you might really need it.
And, the real bonus here is the experience gained whilst repurposing what is seen by most people as 'trash'.
Consequently it strengthens self confidence, knowing that you are able to 'think (and tinker) out of the box'.
All are tiny steps towards becoming the maker of once own path. But it will also inadvertently lead to learning more about the truths of our modern so-called-ciety, which can be quite life-altering at times.
It is NEVER a bad thing to learn stuff....whatever it may be!!
Just flip the valves around! It`s a lot easyer and more stable as the glue.
That's correct in theory, but the valves on this cheap little pump are not separate or simply reconfigurable for direction...they are integral to the cylinder heafd casting, so your "all-you-gotta-do-is-solution" is practically impossible...are you in manager school?...just asking...
Not posible on this cylinder
Should have put the screws through the top with the gasket first, then slipped it onto the base.
Thanks Captain Hindsight!
Im a hobbyist have and old air compressor very small. To turn my in to vacuum pump. Probably wouldn't be as ha4d to do. Except to change out the intake ? Probably in that order. But this be good idea!
If you gouge off the thin metal that crimps the original hose in place, the hose comes right off and reveals a hose-tail... of no practical value, but looks a little nicer.
hey bro you forgot to flip the ring of the piston
you can increase suction power by changing the direction from upside to downside of a seat on piston
great vid, I am about to use solder instead of epoxy glue but good for plan B if solder will be no-go
Thanks! I guess you just have to be careful and take off all the rubber seals and gaskets.
Do NOT use solder on pressure gaskets!
Shona O'Neill Can I ask why? seems to me like better idea than epoxy because of stronger bonding (at least I think two soldered metals will make better bond than epoxied (not stronger thou... but seal would be better, at least in my head))
I'm sure it will work with soldering too, but it's going to be a lot of extra work. You have to disassemble the hole cylinder head to remove all rubber parts and then you'd have to put it all back together.
If I were you, I would simply use epoxy, since it also creates a very strong bond and is overall easier to use.
makeing a two stage vac pump out of one of those and a vacuum sealer pump
hi there how much vac did this produce? inHg? Thanks
how do you want to stop the epoxi from outgasing as soon as you pull any decent vakeuum ?
you coiled the teflon tape into the wrong direction
I assume that you're going to be using this for vacuum filtration.
I'm looking at making a vacuum chamber for degassing silicone rubber and resins. I wonder if it would be good enough for that.
Sadly, I don't have a vacuum gauge AND all that "Torr" and "Bar" stuff still confuses me... time for some reading, I think.
Are there any amateur classical physicists in the audience?
I will eventually post a better version of this pump, which should be good enough for things like degassing resin or making carbon fiber parts!
reverse the motor? The piston inside goes up and down, if you reverse the dc motor the piston will go.... erm...up and down. The best solution is to put the non-return flap valve on the other pipe but from an engineering point of view this looks pretty tricky. This isn't a bad solution but similar size pumps set up for vac are very cheap on ebay. But hey! Where's the fun if you can't make ?!
can i use this as a vacuum pump to suck out a liquid from.somewhere and throw it out ?
No. Air is compressible, liquid is not. This compressor would definitely not be able to handle the added pressure. Even if it could create enough vacuum to lift the weight of the liquid it would likely blow the cylinder apart. better to use a manual suction pump to evacuate liquid. Something designed for the purpose.
You need a different type of pumping mechanism for that, preferably one that is designed to pump fluids I.E. Rotary vane pump mechanism
If it can produce enough vacuum, just put a beaker in front to trap the liquid so it doesn't reach the pump.
And how would you attain vacuum if you put a break in the inlet tube?
Please read my response once more.
Thanks for idea - wanna combine with cheap desoldering pump (@$8) for auto desoldering vacuum pump ❤
Thank You !!
Good work . I think you could have kept that one long screw in place all the way through. But perhaps it is more convenient to do it the way you did :)
Thanks! I'm sure I could have made it work, but it was already pretty late and I opted for the easiest and quickest solution ^^
Or bend it by 10°, insert and then bend straight again using a lever - the thread in the middle isn't used anyway.
Insert the screw before epoxying the brass connector
Change polarity and it could work
I don't think it would because of the check valve
i restored a Hilti 150-U core rig, the stand has a base that seals down with vacuum pressure, im not buying one from Hilti
they over price them,,i have about $800.00 in the core drill & stand,,they sell for 6-grand new including the water vacuum
so the compressor conversion that you did should work on a small RYOBI i have & Hilti wont drain my pocket! (thankx-CX)
I don't know but, could I just reverse the direction of the current?
I was wondering that also but i thought about it and I don't think it will reverse the air flow cause of the check valve,but im not sure 🤔
@@billmeade9029 even if you reverse the current it it will still work the same way.
Since its a DC 12V motor did you first try to reverse the direction of the motor by reversing the polarity of the leads?
Would not work. The direction of the lamellar valves would stay the same and with them the direction of the air flow.
@@XDevil127 is that what it's called? I always called it a check valve, probably same thing ( one way valve)
@@billmeade9029 Maybe different names for the same thing...
Always a pleasure to innovate.
If you could change the polarity of the motor, you wouldn't have to work so hard and you would just convert air pump to a vacuum pump in the same fitting.
Incorrect. The intake and outlet have "check valves" which only allow air to flow in one direction. Reversing the direction of the crank will not make it suck instead of blow because the check valves are controlling the direction of the air flow.
@@mitchd949 or to think about it another way, the crank converts the motor round-and-round motion to up-and-down of the piston. If you ran the motor backwards, the piston wouldn't even notice anything had changed, it would still just go up-and-down.
Please show how much vaccum this pump can generate :)
I will ^^ Currrently I don't have a vacuum gauge, but I want to do a test with a hose and some water. I'll tell you the results once I get around to it.
ChemX
:-)
it can generate about 160 Torr of ultimate vacuum as my old VPBW-1S
My Fridge Pump make about 0,05-0,1 bar or ~ 60 Torr but i do not know how accurate my china gauge is.
what about inverting the motor ( piston) motion by inverting the electrical current ?
+goonygoogoo2
That won't work. It will of course reverse the DC motor direction but since the motor just swings the piston up and down anyway, it won't make a difference. Also, as stated in the video, there are two one-way valves that make sure the air flows in only *one* direction, so that makes two reasons why inverting the polarity won't work.
There are only two ways to turn this pump into a vacuum pump: reverse the valves or use the pump's air intake as the source of vacuum, which was what he did in the video.
ok thank you...:)
how long you can be on continuously this compressor?
The instructions for the original pump said to only run it for 10 minutes continuosly. I think that sounds about right since the pump does get quite hot.
If by q I intend to use it as a pump for several aquaria like aria in that case and how to convert it into 12 volts but noc how to make it last connected for longer or indefinite
Because that is the other I have neither the manual nor the box because it was a gift
Buy my compressor have only valve how can I convert it for vacuum
how can this vaccum pump suck the garbage waste ? n if it can how much it can suck & how much energy it required to suck the waste. reply ASAP
Its designed to suck and blow air not solids so it won't work with garbage
Great video, thanks!
can u make a vacuum doesnt have noise or sound
Anthony Tran yes... a refrigerator compressor !!! makes no noise and moer powerful...
Can this converted pump vacuum dish washing liquid and resin like consistency?
I wanted to create a vacuum chamber and this might work. I realized I have an old air compressor like this I never use, because I have an 80 gallon one. I should try this, it is free!? Almost!