Air Bearings: Machining
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- Опубликовано: 27 сен 2024
- Brought to you by the Machine Tech Video Blog!
In this video, Adam describes a simple design for an air bearing and machines the parts to make one. He covers:
+ A simple design for a flat round aerostatic bearing
+ A detailed step-by-step procedure for machining operations
+ Bonus topics: center-cutting end mills, grinding a face grooving tool and ball joints for precision mounting
Link to the 3D solid models and prints for this project:
drive.google.c...
Resources mentioned in the video:
@David Preiss - DIY Air Bearings
• DIY Air Bearings
Title music by Andrew Applepie - "Festivities": andrewapplepie.com
For more about Laney College, check out the website: laney.edu/machi...
AND BE SURE TO SMASH THAT "LIKE" BUTTON!
I like how you go into more detail on the machining operations than most of the machining youtubers. also, you're forgiven for the end mill.
Yeah after watching a lot of other RUclipsrs, i forget that sometimes everything just goes to plan.
"Forgiven" for the end mill? Why? End mill with "PLUNGE" is nothing "new". Been around for MANY decades. How do you think machining a pocket is done?
Your narrative and explanation of minute details are INSANE !!! GREAT.
I'll probably never make an air bearing but your teaching is so good I feel like I could.
Dude! I'll just go back to sweeping up shavings, humbled by your god level explanatory nerding and workshoppery. Thanks for sharing ;)
I stumbled on your channel about a month ago and spent a night watching them all and marveling at your explanations and production value. I got to the end and was seriously bummed out to see your last video was a year ago. Then out of nowhere you post two great videos only two weeks apart! What a great surprise and a valuable insight into industrial tech! Thanks and keep them coming !
Just found this channel,
Applied science, Steves POV and this all in one day, I'm on a roll
I very much appreciate your step-by-step explanations of machining processes. I'm just getting into simple, hand tool hobby shaping of aluminum and it's nice to see the approach and thought process.
the effort you put into clearly explaining and animating everything is more than most youtubers and even some production studios..
this is now one if my top 5 favorite channels(out of a couple hundred subs).
looking forward to the next vid.
This content is so well made.. thank you!
GOD BLESS YOU ADAM. LONG TIME NOT SEEING YOU. I REALLY APPRECIATE YOUR TEACHINGS AND LOUIS. I AN STILL IMPRESSED FOR YOUR GREAT CAPACITY FOR TEACHING AND PERFORMANCE AT THE SHOP. YOU ARE VERY INTELLIGENT AND VERY INSPIRATIONAL!!!
I'm 4 minutes into this video and had to pause ... to put my noise-cancelling headphones on, settle into my seat so I can give it my full attention, hit "Like", subscribe and write this comment. This has amazing educational and production value.
Your explanations are so clear and detailed. Presentation is very well done. The same type of accuracy we had to do in our school making machining project reports, those were pretty useless, but in this aplication of making instructional videos it just works. Good job!
I'm no dentist yet this video has helped clarify a few things. Ty.
An utterly incredible video! Seriously informative!
Thanks, Alec! Very much appreciated.
I'm very much looking forward to the next video! Great idea about using the arbour press to force the aluminium into a conformant shape with the ball bearing.
I like this series. Good job on explaining the different techniques and tools you're using.
Incredible amount of detail! Very informative and entertaining at the same time ... much better than any of my engineering Professors!
Im sad it ended
Victor Hugo same 😅
This insight into end mills for flat bottomed roughing would have been super useful about 14 hours before I saw this video. It would have saved me a DICKLOAD of broken dreams at trade School this afternoon. But thanks, now I know my problem was the reverse of what I thought it was, and I shan't do it again!
Your videos are so well made and provide fantastic information. I can't wait for the next one!
This guy Adam is awesome.
As others have noted, the presentation and content are exceptional. I always enjoy your instructional videos. I can't wait for the next one.
Miss Yojimbo, though. :-)
Very cool, good to see you back!
Sick vijeo! Im super excited to see the lathe!!
Detailed, but good pacing so it’s fun rather than plodding. Props.
Thank you for the details about each operation. I like it a lot!
Why couldn't you have lapped the bearing into the aluminium, then you would have had more of a socket/pocket for more depth? Fantastic video and lovely work shop and tooling detail!!
Gosh, that sounds like a lot of work. The pressed-in spherical annulus is super easy, quick and cheap to make and it works better than pretty much anything else for precision ball mounts. To get better performance, you'd have to move to a flexure design.
There is nothing hacky or otherwise shameful about drilling a flat bottom hole with an end mill. It's perfectly acceptable practice. Trust me, it's done in industry all the time.
you present very well.. Good technology.
We used to machine graphite all the time. Thank God we do not do that now. The hands were always shiny black tinge. Very well explained video fella.
dude i love the intro music
amazing content and production. thanks for putting in all the work to make this video. it shows.
can't wait to see the cylindrical air bearing video (I'm thinking of making a crankshaft precision balancing setup): have to come up with a trick to get the proper ID fit in carbon, hopefully without damaging the journal surface of the part to be balanced...
The triangle seat would be best partially roughed and then pressed in before machining, then mounted between centers to make sure the point of the triangle is on center. This would also strain harden the material creating a better wear surface for the ball bearing.
my God! He's back!
I learned a lot, I just wish if I have a workshop like yours
I have no words but well done 🙂👍
Awesome work! Thanks for shearing!
Awesome narration! Best out there!
Is it possible to build a super precise lathe with these bearings?
For the ball you can put it in a drill chuck and a little lapping compound would be more accurate
Very well done, would like to see a video about hydrostatic bearings. like what kern cnc machines use
I can't believe you put an end mill in a drill chuck. The run out. Do you also use your calipers to scribe lines? LOL
What type of Graphite grade insert you are using and the type of epoxy to glue, I really enjoy the video. Thank You
Great job with good explanation . In need the same thing for a tesla turbine because the shaft run with a very high speed
To mitigate dust release, could you have not kept the graphite rod in some oil bottle (I'm thinking 3-in-1) for a while, so that it seeps into the pores and binds the dust?
You got a patreon boss? Game changing content here, love to see it
13:08 great tip/trick, thanks
hope I can buy these air bearing modules... many of us (actually most of us) don't have a lathe...
Just found your videos. Thanks! Subbed!
99% of the world want's to thank you, for putting all the metric values. Videos with fractions and imperial units are just hard to watch and understand.
In this video series, you keep referring to the videos by their Part number ("Go back and watch Part 1..."), but you did not include Part number identifiers in the titles. Could you refer to the videos by their titles, or better, add Part numbers to the titles of multi-part videos. Thank you, and love your work.
Could you press fit 3 hardened dowel pins into the top to provide 3 hardened contact points for the ball?
Yup, good idea. I've been thinking a lot about kinematic joints and couplings recently, and I think I may do a video demonstrating some of the great solutions people have mentioned in the comments. I also thought of a "simple" way to generate a trihedral which I'd like to share.
Machine Tech Video Blog looking forward to it 👍🏼
where is part 3? have I missed something
Please never have such a big brake in between videos again
Almost a year
Anyway keep up the good work
Ikr, thought he was dead
12:40 why not use the indent from the Ball?
Awesome!
AAAAAAAAAGH, you got your HSS tool blank so hot it went blue! that alters its heat treatment properties.
If you really wanted a simple three face cut then a rotary broach might do it with a cut bottom face to a point??????
I had not considered using a rotary broach (probably because I don't have access to one), but that's an intriguing idea. Machining a trihedron is a pretty good little challenge!
You are awesome really
Is the tool blank pre-hardened?
Yes, and they usually are. FYI I was using REX AAA, a T4 grade of high speed steel which is a decent and very inexpensive general purpose tool material.
Would 0.02-1mm resin prints make this work... ?
Where is part 3
very nice video, outstanding quality, but dude pls make that music at the start of it a little quieter. Like, 35% quieter)))
Nice video. 1 question.
What is your 3 jaw chuck brand. I love to have capability to use aluminium soft jaw
It's made by Bison.
@@LaneyMachineTech thanks
you are a maestro
You're going to explain what a plenum is, but use a word like annulus without one?
Fair enough! An annulus is a ring-shaped region, basically a squashed donut. Mathematically, it's the space between two concentric circles.
The cliffhanger!!!
God tier!
I hate to be the spherical annulus who asks the stupid questions, but if you drilled a small hole through the top of your bearing, through the seat for the ball bearing and into the plenum, air pressure might then come out of the top as well as the bottom, perhaps reducing friction on the ball bearing?
Oooh, interesting... Double the bearing, double the fun.
@@LaneyMachineTech "Double-bearing all the way across the sky (so intense!)"
Wouldn’t the trihedral be easy to make using a mill? As long as you can make 120 degree divisions it should work, right? The mill won’t make hard corners but that’s not needed for this purpose anyhow.
I think you could fake in something which works like a trihedron as long as the ball contacts three discrete points on relatively smooth surfaces. It doesn't need to look pretty or even very trihedron-like. This is a fun machining challenge!
A detail: increasing material hardness does not increase stiffness.
Turbomachinery & Pump Symposia 2016 - RUclips
The world are metric now
Is it just me or does it look like there is some runout at 9:22
You gotta appreciate the crooked numbers of the imperial measurements.
Man Ai imagined Ai air-flow lengths and paths could be a unimaginably Ai thing......
NOT!
🤜🏼🤛🏼🇦🇺😎🍀
Good content and well-made video - the cocky attitude is a major turn-off, Adam.
We have ball bearing (solid), we have hydrodynamic bearing (liquid), we have air bearing, i wonder if there is anyone trying to make bearing on the forth form, plasma? well, i guess there is no such thing yet, but the name “plasma bearing” sound hot 😃
RE the ball and socket: Did you forget ballnose endmills exist?
I can see two ways I would use a ball end mill to make a ball joint: 1) 3D surfacing a trihedron on a CNC mill, or 2) plunging into the material to create a spherical socket. Here are my answers for each:
1) Doable, but I wanted the build to be easily replicable so I did not use CNC machine tools. Also, the step-over resolution of the 3D toolpath would result in a not-very-smooth surface. So, there would be some finish work involved.
2) Also doable, but the ball-in-sphere is not a very good precision ball joint. We have to start off with the admission that the sphere will not be perfect in form, especially if it's just made by plunging a ball end mill, which recreates all the problems of uncertainty with the ball-in-cone mentioned in the video. But it's actually worse than that. Even if we find a way to improve the surface quality of the sphere, it is guaranteed never to be EXACTLY the same size as the ball. The worst case scenario is if the sphere is larger than the ball, because the ball will contact only in the center and will rock around. If the sphere is smaller than the ball, then the ball will sit on the top rim. In this scenario, we're right back to the circular line contact of the ball-in-cone but without the bonus wedging effect which helps to retain the ball. Or if the force on the ball is high enough, it will press into/seize in the undersized sphere and the bearing won't be able to orient to the guideway surface. Many commercially available air bearings use a ball-in-sphere joint, but a hole is first drilled to relieve the center of the sphere. This is better, but only marginally. The ball sits on the rim of the center hole (ie circular line contact), but it is still very susceptible to getting unseated and rocking around.
aluminium
not a machinist - why is drilling a hole with an end mill so shameful? is it just that end mills are more expensive than twist drills?
Can't make the ball touch the surface?
No problem! We have brute force. Awesome... 😂
Lot of pens in ur pocket
I forgive you for the endmill, but not for calling it a ruler.
Team scale all the way
Todd, you old so-and-so...
Aw, it finished
Oky im soory im not firpic
Dude, nice video but please go metric like the rest of the world
This motivates me
Wow. The amount of work put into illustrating every part makes this fairly complicated build very easy to follow.
I think this is one of the best produced machining videos I have ever seen.
I thought you died, I’m glad you’re back. Take as much time as you need
I’m really excited for the micron machine you’re going to build
learned something??? I learned A lot !! Awesome video Adam👍👍
Thanks!
As much as I cringed for the end mill misuse, your display of knowledge and understanding more than makes up for that. No broken end mills!
lap the ball in with 1 micron lapping compound then replace with a new one problem solved .
Uh not really, since the aluminum is far softer than the ball bearing the lapping compound will embed into it turning the aluminum into the cutting tool. So the ball would start to be lapped to the shape of the aluminum seat that's already there and not the aluminum lapped to the ball shape which is what you'd want. The only way it could be lapped would be to use something softer than the aluminum but with the exact size and precision as the ball bearing. It's a complex problem and not quite as easily solved as it might seem.
your right
Excellent!
ATB, Robin
I will be waiting for you, I,ll be back, hasta la vista baby.
Fantastic tutorial, I like the very detailed breakdown of the operations.
-> Is the carbide vs steel shank on the boring bar important? Perhaps it’s stiffer?
Can you tell me what kind of graphite material this is? Is it ordinary graphite that can be used for high-temperature molds? I wonder what kind of process is used to ensure the porosity of the porous? Thanks for your answer