Re: how standardized are metal lathes?
- From: dnichols@xxxxxxxxxxx (DoN. Nichols)
- Date: 3 Jun 2006 19:38:22 GMT
According to rvannatta <robert@xxxxxxxxxxxxxxxx>:
[ ... ]
amen to the not very. Everything is different. If you have any
doubts
look at the American Tool Works lathe I just acquired:
I made a web page for it at "http://www.vannattabros.com/iron56.html";
That is an impressive machine.
Until I get the chuck off I don't even know for sure what the spindle
mount is, but I believe it is around a 4" threaded.
So the spindle through bore will certainly accept some of my
smaller chucks to pass through. :-)
BTW I wandered to your "computer history" page, and have a couple
of comments.
1) The Persci drive you had in the IMSAI -- wasn't that the 8"
floppy with a voice-coil servo for head positioning, instead of
the more common stepper and leadscrew? IIRC, it actually
accepted two floppies on the opposite ends of a single spindle.
2) The origin of the "Winchester" name for the early fixed-platter
hard drives: The original 30-30 drive was a dual spindle drive
made by IBM, with each spindle having 30MB of capacity. The
rest is as you said. (Of course, mainframes before that used
the top-loading "washing machine" hard disk drives, with
interchangeable stacks of platters in cake covers. Those were
14" platters. I'm not sure what the size of the 30-30 drive's
platters were, but there were also cartridge loading drives
which had a single fixed platter and a second platter in a
removable cartridge. These were more common in mini-computers
than in micros, however.
FWIW I still have my first computer too -- the Altair 680b, one
built around the Motorola 6800 CPU instead of the more common
Intel 8080, or the Z-80 which was a common upgrade to the 8080.
I thought that the IMSAI used the Z80 by the time of the machine
which you are describing.
One of my early machines, at its peak, had four 8" floppies and
four 5.25" floppies.
Enjoy,
DoN.
BTW -- do you have a relative with the name "Peter W."? I used to work
with someone of that name many years ago, and have lost track of
him.
--
Email: <dnichols@xxxxxxxxxxx> | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
.
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- From: DoN. Nichols
- Re: how standardized are metal lathes?
- From: rvannatta
- how standardized are metal lathes?
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