[modeleng] Re: Honing/lapping steam cylinders
- From: Allen Messer <al_messer@xxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Wed, 25 Aug 2004 16:50:53 -0700 (PDT)
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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