Tim,
You probably hit the nail on the head with cost. To manufacture a pump shaft
from scratch and have it hardened should cost about $50 USD complete.
Regards
Peter Vucinic
TR-4
----- Original Message -----
From: "Timothy F. Murphy" <timmurph@execpc.com>
To: "'FOT'" <fot@autox.team.net>
Sent: Wednesday, July 07, 2004 9:29 AM
Subject: Re: Pump Shafts
> Any thought to making the shafts out of maraging steel? This is a
> "space age" material or "super alloy" that has the very desirable
> property of being able to be heat treated at something like 400 degrees
> fahrenheit which virtually eliminates distortion or size changes. We
> used it at G&L to machine the "fingers" used for the tool holders, which
> had rather complex and precise geometry. After machining the heat
> treating left the parts as they were with the tolerances intact. The
> finished product was very tough with excellent mechanical properties.
> One problem - it's expensive stuff or it used to be. I did have some
> "prototype tools" made up by the R&D machinists which just happened to
> work really well on one or another of my cars. Great stuff.
>
> Just a thought,
> Tim
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