Five and quarter drives

From: Vintage Computer Festival <>
Date: Fri Feb 11 23:11:12 2005

On Fri, 11 Feb 2005, Loboyko Steve wrote:

> 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

Nope. I scrap them all the time. Perhaps some are aluminum, but most I
see are cast iron or zinc. Aluminum is probably 10X the cost of cast
iron/zinc so it wouldn't make sense.

> 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
> stampings.

Are you sure they used aluminum? It's easy to confuse zinc casting with

Sellam Ismail                                        Vintage Computer Festival
International Man of Intrigue and Danger      
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers   ]
[ and academia at  || at  ]
Received on Fri Feb 11 2005 - 23:11:12 GMT

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