[modeleng] Re: Cast Iron Coolant

This is just from memory (which ain't good), but I think it was something to
do with the grinding bringing excess carbon to the surface & making it
difficult to weld

----- Original Message -----
From: "Allen Messer" <al_messer@xxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Wednesday, October 26, 2005 11:20 PM
Subject: [modeleng] Re: Cast Iron Coolant


> "...never grind Cast Iron..."  Very interesting as I
> used to look at castings in transit out of curiosity
> and most all of them showed grinding marks where they
> had been fettled at the foundry.  Maybe you can get
> away with grinding "green castings"?  Not knowing any
> better, I used some Mineral Spirits as a lubricant
> when doing the final boring cuts when I built a Stuart
> 10_v and it turned out O.K.
>
> Al Messer, in foggier than London middle Tennessee
>
> --- Terry Lane <tel@xxxxxxxxxxx> wrote:
>
> >
> > Hmmmm ......... at tech we were always told never to
> > grind cast iron - cold
> > chisel or file only. Actually, there is a reason,
> > but I'd have to go back
> > thru' the old books to find it
> >
> >
> > > Hi All
> > > I have all ways been told to never to use coolant
> > or cutting oil. when
> > turning or milling cast iron and never have. Has
> > anybody got any ideas on
> > why this is.I think I was told that it would cause
> > hard spots in the iron..
> > You always use coolant when grinding cast iron or
> > you will end up with burn
> > marks.
> > > Lee
> > >
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