[modeleng] Re: unknown thread
- From: "Phill Smith" <steam@xxxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Fri, 15 Oct 2004 23:53:34 +0800
The steel will wear faster. The porosity of the cast iron helps to hold the
oil for better lubrication, which is added to the natural lubrication
qualities of the graphite within the cast iron. The two combined are an
award winning combination. Steel lacks both of these qualities.
Cheers,
Phill.
----- Original Message -----
From: <peter.chadwick@xxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Friday, October 15, 2004 11:21 PM
Subject: [modeleng] Re: unknown thread
> >DON"T get rid of that Holy Book
> That Machinery's Handbook actually belonged to mt grandfather (who died
> years before I was born): he had a small engineering firm in Birmingham. I
> still have his sheet metalworker's hammer and couple of his cold chisels,
> too.
>
> I also have an American book on patternmaking dating from the late 19th
> century. It doesn't say much about shrinkage allowances for materials
> other than brass and iron.
>
> Which leads to another question: would a plain cast iron cylinder ( and
> for that matter steam chest) suffer relatively little wear because of the
> graphite inclusions providing lubrication, or does it wear faster than a
> lubricated steel lienr?
>
> Peter Chadwick (soon to be on a 'plane home!)
>
> MODEL ENGINEERING DISCUSSION LIST.
>
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>
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