[modeleng] Re: Honing/lapping steam cylinders

Sounds good.  I have also heard of introducing
Graphite mixed with the oil for running in like this.
Have you ever tried it?

Al
--- alanjstepney <alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
wrote:

> 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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