Great demos like this are seldom seen nowadays but it is a must for hobbyist to know this old method. You can build a decent airgun following the procedure - many thanks "face off". Back in the 80's, we did it in a much harder way, using pin locks slightly off-center as we lack the taps for the thread. We have to find exact fits for the solid round bars, pipes, etc. and use files/sandpaper to form the parts. We use hand drills and bits as well. For major joints, we use brass brazing and minor joining using lead for the rest. We sure lack equipment back in the day. Thanks to this video, ready-made hardware parts made life easier. But I warn the DIY people in making this exact plan when handling high air pressure, especially above 2000 psi. Be sure you know and understand the allowable maximum pressure (pressure rating) of your metal fittings, parts and joints. Some well known brands of pcp air rifles exploded below its warranty. Be sure you know what you are doing before you are confident to reach 3500 psi.

S=(π•D to power of 2)/4 ~ 3•9/4 = 6.75 cm2 3500 psi~200bar Bar= kg/cm2 200bar=200kg/cm2 200•6.75=1350 kg That's over a ton of force that is pushing those endcaps off. If it will fly off it will kill someone. I don't think that those screws can whistand 350kg of shear force. It's really dangerous.

Warning for viewers: it’s a bomb 3 times over. 1) 1mm wall thickness is far to little. 2) the end caps receive a huge load which is bound to shear off the pins securing them. 3) the threading was done wrong. Look up the required drill diameters, use them, and also use a drill press or lathe for good alignment, better roundness and cilindricity.

AWSOME!!! this is exactly what i needed to make a custom airtank in school!!

This guy makes a good tapped thread with an adjustable wrench when I break them all while using the proper handle and drill oil... Good show! 😊

I don't think a 1mm wall is safe at 3500 psi. You might want to verify you're getting at least a 3 to 1 safety factor compared to burst pressure.

Nice to see craftsmanship like this done with the proper tools. Excellent video and great teaching tool.

Gorgeous ! Thank you.

Video 🔥🔥 Create a series explaining every aspect of gun making and number it accordingly so that we can easily go through each step easily.

Yeah, I don't see this holding a lot of pressure, best use hydrolic tubing and threading the ends. Always overshoot the pressure rating by using tubing that is rated much much higher.

Nice concept and end result.... but if this pipe is OD=32mm T=1mm (0.039") Its bursting pressure is only 1872psi (working pressure 1248psi) So.. if you really but into thiskind pipe 3500psi, its miracle if its not blowing up very deathly! Im working in this field, so Im NOT telling you bllsht :D

according to @MrAntza 1 year ago Nice concept and end result.... but if this pipe is OD=32mm T=1mm (0.039") Its bursting pressure is only 1872psi (working pressure 1248psi) So.. if you really but into thiskind pipe 3500psi, its miracle if its not blowing up very deathly!

Sangat keren dan juga menginspirasi,sukses selalu kawan👍👍👍

The basic "inspiration" and visualization of the parts is great. And for engineering, the "concept" or you might say the "idea" is half the battle...thinking of WHAT you need to build But the actual construction methods here leave some areas for improvement, it's little things that us folks who literally grew up using tools would see: notice that holes were drilled without a drill press...it is humanly impossible, if drilling into a tube or a rod-type piece or material, to get a perfectly plumb hole drilling by hand. You can get CLOSE, but not as plumb as a drill-press. Next: when tapping threads, backing the tap out, using a wrench causes the tap to 'wobble' on it's travel, and so ruins the perfectly circular hole into which the threads were cut...the hole becomes elongated, and the threads therefore become a little shorter (peak to trough) on one side than the other. ...if you're making a tank which is supposed to hold 3500lbs of air, could be a BIG problem. There were many little things like this, but not worth going into detail, since this gentleman won't change his style. But anyone thinking to copy this item, try to employ better machining and fabricating techniques, for safety.

inspiring stuff, Thank You for Posting. May i know more of quick coupler construction, is it home made or bought out

Got your hpa hand pump! Great

Awesome👍👍👍

I am late to the game on this video and don't want to add to the pile-on about the safety issues. The demo and methods of what you can do without an expensive bunch of equipment is always to be commended, and I admire that. Making do with what you have is a lost art, so kudos to face off for his creativity. But with that said, and not knowing what specific stainless steel alloy and temper he is using, I am skeptical of the safety at 3,500 psi. All stainless steels are not equivalent and some of them are surprisingly weak compared to the more common carbon steels and to most alloy steels. If we assume that this is type 316 stainless, I calculate that the tube, and the end-bolting method are good for about 1,500 psi, with a safety margin of about 2.6 to 1 for the yield strength of the tube (for bursting), but only a safety factor of about 1.7 to 1 for the ends of the tube distorting in the areas of the 4 drilled holes. I have done a lot of air tube tests to failure on my channel and there are many different failure modes, not just the tube blowing up. If you are lucky, an o-ring will leak or pop first, and some airgun designs are actually made with excessive o-ring clearances such that an o-ring will leak before a catastrophic failure occurs, if the tube is inadvertently filled above its safe maximum. For this design to be safe at 3,500 psi, with a minimum safety factor of 2.3 to 1, I would suggest a 2mm wall thickness of the 316 stainless tube of 32mm O.D., and also using 6 screws instead of 4. That is based on calculations for 5 different failure modes, and backed up by destructive testing that I have performed to validate several of the generic failure modes. Please be safe, and if you are in doubt, don't do it until you are sure about the safety.

you did a very good job using hand tools

Really dangerous!

You saved my time

I add all your videos in a playlist called "Videos that will get removed by KZfaq" :) Great content man

I like your enthusiasm and creativity with only hand tools but wouldn't encourage people to copy this and fill to 3500psi because the hospitals are busy dealing with the virus, I don't think they have the time to put you back together at the moment.

Good job brother ... Nice to know you I'm from indonesia ... Thx

Nice...Both caps receive the same pressure and force...why one wit four and the other with two screws???, thanks.

Great idea how did you make the grooves for the o-rings? I'm looking forward to the rest.

Why the air is not coming out when you pump to fill the tank (pump intake fittings) if you use quick connector only,is there one way valve in that part?

Very nice..👍👍👍

气室设计的不错。就两堵头应该设计个贯通的安全插销。高压的时候，你堵头上那两个小螺丝我看着太恐怖了。针阀那再加个简单的设计，实现简单的恒压。

Face off !! Definitely you gonna get your face off after this!3500 psi seriously or you added extra zero mistakenly😐🙏😅👍other videos in this channel extremely good😍👍

this is tutorial how to making a pressure bomb....

Nice sir

I appreciate your vision and mission...it was awesome ..thanks

Ok cảm ơn kênh nhé chia sẻ

Good job

Majority of Brass fittings are only rated for 125 working psi.... I’m sure this exploded and that’s why he doesn’t show his face.

great job & video, but what are these round aluminum blocks with the cutout for the o-rings? do they have a name & where can you get them?

Legal vc foi único a fazer vídeo bom explicando tudo

Mantap....

I'm a little bit worried about your safety

If not done what are the ideas that can reach that 4000psi pressure

is it a joker d-32mm pipe? what is the safe pressure for the tank?

Dangerous stuff if higher pressure.

What happened to the full auto pcp that you were making

Amazing👍

I recommend just buying an aluminum paintball tank and using that. Pressure tested for much higher than what they are guaranteed for, and you can add a regulator much easier.

Pneumatic IED, i saw one with flying shrapnel...

Rename this video into: How to make a pipe bomb with compressed air.

You are awesome

Face off soy nuevo en tu canal. Tienes muy buenos videos.

When will you make a tutorial on the full auto gun? Love your work and keep it up!!!!!!

Tnx for return form a long pride

Salam bos... Apa aman klau tabung guna screw tanpa drat... 🙏

Nice

*Hello, my friend, good jobs, great idea.*

Hi face off I like ur videos alot in the middle of a build of my own but was wondering if u have tried using an fire extinguisher for ur air valve I've seen a bunch of videos but there's a huge language barrier in all of them lol thanks

Not sure end caps held in by 4 screws is safe, as well as a tube with 1mm thick wall.

Oh Nice👍🏻👍🏻

Ник хорошо перекликается с отсутствием защитного кожуха на болгарке..

Your the man bro👍

Safety margin? Working pressure? I wouldn't gome within a football field of this pipe bomb!

Wow, I'd never have the balls to build a 3k pressure vessel. It's silly seeing as I play with 40 or 50k pressure reloading and shooting but I guess I just feel more comfortable. Haha

big fan bro

If you want to know how pipe bombs are made, you found it.

after very long time...

Can you give me the name of the parts for this vid

What if im using galvanis pipe 2mm thicknes. Can it hold 3500 psi

Im not a machinist but I have never seen anyone use a thread tap in a drill. I assume it would be an easy way to just rip the potential threads to shreds and that is why a tool turned by hand is used? Am I correct on this? Or is using a power drill an acceptable way also?

Ok ok verry good

Is it very safe ? Have one of them exploded or one of the end caps blown off i realy want to make one but idk if its dangerous

is you really fill 3000psi in that pipe or less?

Sir any video about the set up for the pins the one you attached for the tank

Tube seamleas or welded

Good video,but with that 1mm wall thickness tube and m4 screws not operable above 800psi....burst pressure around 1500psi

Bro Am from Nepal. I watch your video a lot. I have made 3 air gun before. Your idea are good. I know how hard to get an idea sir ji. Now I am making another air gun which will hold as much pressure as DIY and scarp metals can do it. Can we share idia in Facebook or other platform. I recently got an idia for a high psi air tank but not really sure. I am planing to use motorbike shock outer chamber for the pipe. It has really good thickness.comments are open for every one. Hoi good are those pipe . They have serious thickness. And we can get it easily from motorbike repair shop. Help me.

Sir where can I buy that BSP thread I can't see it on online shop

Sir gun me jo lagaya hai use kiya Air bolte hai

Super

I just wanna ask what kind of hammer pen is this? or what is the name

Good 👍

1mm thickness can hold 3500psi? i really dun know about this, not mean challenge or anything, just want to know the answer or the formula how much thickness can hold how much pressure.

32mm outer and 1.5mm thickness stainless it's ok or not for air tank 1000psi

Where do u buye the air valve from mate and whats it called

Can you make a pressure regulator for 150psi?

Really Top.👍👌

Hadir bang

Make a video for barrel and fit barrel washer.

De que material você fez o cilindro? What material did you make the cylinder ?? ¿De qué material hiciste el cilindro? 你是用什么材料做汽缸的 シリンダーはどのような素材で作ったのですか？

*How do you made that air valve*

He pumped a few times, the pressure is 5 bar, max.

Can ordinary bike valve work instead of using quick one way valve? Ty:)

Can you give me the name of the parts.? So I can buy it. Thank you...

No air leak?

channel named after OP blew his ...

good jobb,,

Caution!! Your 1 mm pipe wall thickness is not sufficient!! Assuming a yield strength of 235 N/mm for SS 316 and a safety factor of 1,5 for seamless pipe you need 2 mm wallthickness!! Your 1 mm thick airtank can blow Up in your face. The end cap could blow Out too.

how the ragulator that release the air call?

Your waiting for a disaster.to happen! Its like holding a bomb waiting to blow with shrapnels along with it.. trust me i know..

Compressed gas is no joke! Do the math before playing with it. The load on each endcap (30mm) @ 3500 psi (241 bar) are 1700 kg or 3747 pounds ! How long will those screws take thed load ??? ... just saying ... The thicknes of the tube I´m not smart enough to calculate

Sir ano tawag diyan sa bilog nilagyan Oring?