[modeleng] Re: Honing/lapping steam cylinders

Thanks, fellows, for the advice---I will certainly be
following it when I get to that point of completion.

Al Messer
--- Terry Lane <tel@xxxxxxxxxxx> wrote:

> Yep, that's wot I do as well - run 'em in both
> directions if possible & add
> a lettle graphite powder to the oil
> 
> 
> 
> > I always run my engines in, usually turning them
> mechanically for a while
> > (clamp on lathe bed with crankshaft in chuck, and
> low revs works for me),
> > with loads of oil everywhere.
> >
> > Then run on low pressure air, again with lots of
> oil.
> >
> > By that time everything has loosened up, and a
> look at the bore will
> usually
> > show it to have a nice smooth, but not mirror
> finish.
> >
> >
> > alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> >
> > www.alanstepney.info
> > Model Engineering, Steam Engine, and Railway
> technical pages.
> >
> > ----- Original Message -----
> > From: "Allen Messer" <al_messer@xxxxxxxxx>
> > To: "modeleng" <modeleng@xxxxxxxxxxxxx>
> > Sent: Wednesday, August 25, 2004 4:03 PM
> > Subject: [modeleng] Honing/lapping steam cylinders
> >
> >
> > I know that the bore of a steam cylinder should be
> > both round and parallel, but should the interior
> > finish also be "mirror bright" or should we strive
> for
> > the "cross-hatched pattern" of the internal
> combustion
> > engine cylinder?
> >
> > Al Messer, confused in rainy Mid- Tenn.
> >
> >
> >
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