[modeleng] Re: Metals
- From: cbrumbelow@xxxxxxxxxxx
- To: modeleng@xxxxxxxxxxxxx, <modeleng@xxxxxxxxxxxxx>
- Date: Wed, 17 Nov 2004 23:17:44 +0000
Could it be "chilled cast iron", Alan? A discussion about the wheels of the
Simplex WWI era gasoline powered trench locomotive indicated that they (or at
least some of them) used chilled cast iron wheels which were virtually
impossible to remachine. This is supposedly still the Simplex site, but it
won't load at the moment for whatever reason.
http://www.rustons.fsnet.co.uk/spx/ Charles
-------------- Original message --------------
> One metal I have never had any problems with is cast iron.
> That is, until yesterday evening..
>
> I wanted to turn an old (50 years old +) casting into something else.
> All I needed to do, to start with, was reduce the diameter.
> Unfortunately no matter what combination of speed feed and cut I used,
> nothing would get under the skin. Even a carbide tool skated across the
> surface unless I applied so much cut that it stalled the motor.
> A file didnt mark it appreciably, and only a diamond file made a reasonable
> impression upon it.
>
> A normal grinding wheel was useless, but a green-grit wheel did take some
> off.
>
> Having consigned it to the "might come in useful one day" box again, I
> wonder what the reason is.
> Anyone have any ideas or (polite) suggestions?
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