[modeleng] Re: Honing/lapping steam cylinders
- From: "Terry Lane" <tel@xxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Thu, 26 Aug 2004 08:08:08 +1000
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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