Eric,
Very cool.
20-50 microns, for reference, is 0.0008"-0.002", rounded up. That's small
for most shops,
but honestly, not for a grinding shop. Most grind shops work in +/-
0.0005", or honestly, +/-0.0002".
0.0002" is about 5 microns. Gauge blocks, for reference, are normally
toleranced in millionths of an
inch, 0.00005". That's done by lapping, and hand checking. Most machinists
work in +/- 0.005".
I myself work in the 20-50 micron range for watchwork quite commonly by
hand on the lathe, for
friction fits. It's difficult, but with training and good equipment, not
unheard of by hand, or even
with a hand graver :)
On Sat, Feb 6, 2016 at 7:28 PM, j. eric townsend <jet@xxxxxxxxxxxx> wrote:
On 2/6/16 19:14, Andrew C. 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.
For a reference point -- my friend with the CNC grinding shop only
polishes down to 20-50 microns, and that's done by hand.
--
J. Eric Townsend
<http://www.flatline.net>
HF: KG6ZVQ
PGP: 0x335E5548 / 75DB 5C22 FD5D F33E B1FA D5BA B429 EA93 335E 5548
