From what i have found they run at 60-80psi.
http://www.newwayairbearings.com/
The are only flying 5micron (0.0002in) about the other surface so there is
not much room for the air to compress.
The amount of deflection due to the compression of the air would have to
due with the amount of surface area. 60psi on a 1in by 2in surface is 120
lbf and you would have more then one bearing per surface.
Air bearing spindles are very common in high precision applications. the
runout of an air bearing is far better then anything you can achieve with
mechanical bearings. you can run air bearing spindles at much higher speeds.
The tolerances for linear bearings would not be as bad as you may think. If
you mount them on a ball and socket mount you no longer have to worry about
the parallel and squareness of the overall part. All you have to worry
about is the bearing surface flatness and finish. On a small part should be
able to hand lap that.
Air bearings could be do able.
When i was working on my steam engine i was playing around with the air and
had the two parts acting like an air bearing.
I may need to start playing around with making an air bearing. this could
be fun.
On Sat, Feb 6, 2016 at 8:43 PM, Joachim Hall <jjoachimhall@xxxxxxxxx> wrote:
How much pressure do you supply to an air bearing? I would think on a
lathe spindle it would get pushed off center when you start applying a
cutting load and the surfaces would rub. But I guess if you had enough air
pressure...
-Joachim
On Sat, Feb 6, 2016 at 7:14 PM, Andrew C. <soshumasamune@xxxxxxxxx> wrote:
Oh dear god, they finally found it. THE lathe.
Alex I knew you would find this. I didn't know how long it would take,
but yeah. This lathe is absolutely ridiculous.
I honestly don't think anyone at hack pittsburgh would have any project
needing 1 micron accuracy, but I want this
lathe, bad.
Air bearings though, are doable. They can be machined yourself, but the
tolerences are crazy tight, and they have to be
dead on to work right. If you could do an air bearing spindle for your
lathe, that would be the ultimate- 100,000 RPM and
micro tiny parts at constant surface speed would be doable.
-Andrew
On Sat, Feb 6, 2016 at 3:21 PM, Joachim Hall <jjoachimhall@xxxxxxxxx>
wrote:
I've seen this video before! It amazes me every time. It's amazing how
all those parts are just floating on air.
On Feb 6, 2016 2:45 PM, "Alex Reasinger" <alexreasinger@xxxxxxxxx>
wrote:
probably to much for hackPGH to buy, but it does give me some
inspiration for the lathe i am working on.
I am now looking up epoxy granite and air bearings.
On Sat, Feb 6, 2016 at 2:39 PM, John Lewis <oflameo2@xxxxxxxxx> wrote:
I'm interested. How much would it be?
On 02/06/2016 02:27 PM, Alex Reasinger wrote:
https://youtu.be/sFrVdoOhu1Q
