Hi David, I’m an engineer at New Way. You did a great job with these bearings. I’m shocked you were able achieve sufficient flatness with 600 grit sandpaper.

Only just now found this in my feed; good job (for once), YT algorithm! What a great project, thanks for sharing the results of all your research about the type of graphite, critical dimensions, etc. Besides being fascinating in itself, it’ll save many, many people hours of frustration and wasted money finding the right graphite. Great, great project!

Thanks for taking the time in making this video, i saw dan gelbarts video of his lathe years ago and really appreciate seeing how diy air bearing can be made

Really great explanation of the obstacles you overcame! Thank you!

This is great!! I was sent by Applied Science as well. And man, I almost can't tell you 2 apart vocally!! Your videos are great btw. Not sure if you'd like for your channel to grow, but I'm betting it will become something everyone will love.

Super interesting video! 👍

Excellent work David. A couple months back I experimented with using carborundum/alumina aquarium bubblers. Indeed, lapping them flat was difficult and required a diamond surface. They produced substantial and very fine bubbles once in the 1000 grit range or so. Regarding the radial attempt, you made what would be classified more accurately as an "air bushing". For likelier success without exact tooling, try partial circumferential coverage using 3 or 4 individual arc segments equally spaced. In doing my experimenting I didn't build a cage and sealed 5 faces using resin, and while lapping I supplied air so as to "flush" the debris - it helped enormously in keeping the abrasive surface fresh, but I've also not experienced with such a great lubricant as graphite so it may not be as helpful. I see what I believe was your supplier on eBay and am snagging a box. There are some good papers on the effects of the "dead air" cavity and plenum shape, btw. Get in touch if you'd like to collaborate - my application is in the nanopositioning realm as well as conventional machine tools.

@LaneyMachineTech

4 жыл бұрын

Cool idea! I will try this too. - Adam

Just finished mine! Great job!

Very nice project. I like fooling around with this type of stuff as well.

Really cool! Good job explaining.

This is great! Have you considered looking at the non porous type air bearings?

Awesome stuff!

Awesome stuff, I used to install/service CMMs.

you remind me of Ben Krasnow from Applied Science! Great content! Keep up the vids :)

@nixie2462

4 жыл бұрын

He was first on this video. XD

Awesome video, keep up.

Thank you!!!

Very interesting. For the air bushing could you used a reamer when boring the graphite?

This is an exceptionally well done project and video (English is not my native language)

Good news I searched DIY air bearing and your channel popped up on top. Is there a reason alot of people are using low psi "60ish". If the air bearing load is surface area multiplied by the atmospheres of pressure is the plenum the limiting factor of pressure? I have a small machine shop and am thinking of building a high precision lathe.

any recommendations on the air supply, what pump to get etc..

I wonder if air bearings could run on the outside corners of T or V 2020 aluminum extrusion. For much of 3d printing it would make for simpler designs, easier parking for transportation (just turn off the air and it locks in place) and fewer wearing parts over time.

Will this work with an aquarium air stone ?

Another thing; to measure deformation and condition of the bearing surface under load you would probably get pretty far by bearing it on top of an optical flat

Do you have some kind of equitation to calculate for amount of psi to weight for lift to happen?

Brilliant little video and best part very clear.....still find it strange that i when i was in need i found heaps of random info. Also i want to know who down-voted at least leave a comment why as long its not abuse

@lpjunction

4 жыл бұрын

A small number of down votes should not be taken seriously. The upvote/downvote buttons on cell phone is just millimeters apart, some people even flipped these buttons by accident.

Great work. But how to prevent carbon powder falls of graphite?

Any chance we can get the cad file to make the housing? Thanks buddy.

what advantage does porous material have over just taking a flat plate and drilling a lot of small holes?

Can graphite be used to reduce salts from water

nice work. can we get the .STEP of the design..? looking forward to hear from you

Clever.

Would love to make some of those linear air bearings for a 3d Printer X Y gantry. I bet they are very quiet while in operation?

@irrelevantfish1978

4 жыл бұрын

Air bearings are actually pretty noisy on their own (they're the source of the constant hiss in this video: kzread.info/dash/bejne/pXqmuMaof8vbYbQ.html), and that's before factoring in compressor noise. And why do people keep saying they'd be awesome for 3D printers? Sure, using air bearings could make your positioning system a few microns more accurate than cheap linear guides, but who cares when the remainder of the system has tolerances measured in the hundreds of microns? Your time/money will be far better spent in a myriad other places first. Personally, I'd love to try my hand at building an air bearing mill or lathe spindle. It seems like you could build yourself something really nice for pretty cheap using air bearings and carbon fiber, and since the only ways to buy yourself steel-working capability is to play eBay roulette or drop >$5k on something commercial, it's a project that might actually make some economic sense.

@samuelschuur7044

4 жыл бұрын

@@irrelevantfish1978 once again though in the case of a mill or lathe your argument about the 3d printer is still an issue...

@irrelevantfish1978

4 жыл бұрын

@@samuelschuur7044 I'm afraid I can't figure out what you're trying to say. Would you please clarify?

@samuelschuur7044

4 жыл бұрын

@@irrelevantfish1978 I meant that for the most part in the mill you propose your precision is not limited by the air bearings but really your other component choices just like your example with the 3d printer.

@irrelevantfish1978

4 жыл бұрын

@@samuelschuur7044 That's true, but mills and lathes are almost always more precise than 3D printers, usually enough that air bearing spindles' lower runout will lead to a noticeable improvement. But even if that's not the case, and the machine is a bucket of backlash and missed steps, you'll still improve machine dynamics, leading to longer tool life, better surface finish, and faster material removal.

What is the cfm these use at 60 psi

I've thought about using porous Terra Cotta or mixing starch/flour with a non-porous ceramic slurry to create a controlled porous ceramic substrate for a hydrostatic air bearing using water at really high pressures, this should increase both load capacity and stiffness by several orders of magnitude compared to air bearings.

That's really cool. Based on your experiments do you have any thoughts on potential challenges of making a high speed CNC spindle using this kind of air bearings (but probably Ben Krasnow's technique for boring precision-fit round holes by cutting grooves and creating a 'file' from one of the spindle bar stock pieces)? Like say, 'top three' problems?

Try aquarium air-stones?

5:19

Are you Tom Lipton's kid?

Nice, some how I think this is going to be the rage in 3D printing in couple of years 🤔

@LanceThumping

4 жыл бұрын

I agree, I feel like these shouldn't be all that expensive to make reasonably accurate for 3D printing and would allow printers to move quickly with less friction for high speed printing.

@MF175mp

3 жыл бұрын

I doubt that consumer grade printers would ever use air bearings as the ball bearing rails are just 100% sufficient for the job. The problems lie elsewhere. Also the real linear rails are not advantageous for 3d printers either, the round rod system is almost as rigid in that application and the rigidity isn't an issue really

why is the sound so low

Great video. You must start a discord community...

shame ya cant hear the video

Вот на чём должен был летать гиперлуп, а не на магнитном подвесе.

Sound is so low I can't hear what you hahe to say. A pity because I wanted to hear it.

@:52, i should call her.....