Five and quarter drives

From: Loboyko Steve <>
Date: Fri Feb 11 22:46:04 2005

Sellam Ismail wrote:

>More likely they were cast iron. Aluminum would've
>been too expensive and overkill for drive mechs.

I think all 8" and all 5.25" drives up to the late
'80's were made from aluminum castings. A "Great
Acheivement" of cost reduction in electronics was the
replacement of cast/machined aluminum with stampings.
I remember seeing my first "sheetmetal" 5.25" drive in
a Leading Edge computer at a Comdex in the late 80's,
and the drive was made by Y-E Data. The Leading Edge
rep said it held tolerances as well as castings as
long as it wasn't dropped. I've seen this in other
types of electronics; my first VCR was built on a
spectacular cast and machined chunk of aluminum; now,
they are made of aluminum foil. the invulnerable
Diablo HyType daisy-wheel printers used an aluminum
casting as a frame; the cost-reduced Qume used

Think you won't see hard disks made with sheet steel?
Think again - with embedded servo tracks and voice
coil motors, it's not unthinkable...

-Steve Loboyko

Nixie Watch (one-tube):

Do you Yahoo!?
Take Yahoo! Mail with you! Get it on your mobile phone.
Received on Fri Feb 11 2005 - 22:46:04 GMT

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:37:37 BST