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. > > > > __________________________________ > Do you Yahoo!? > Yahoo! Mail Address AutoComplete - You start. We finish. > http://promotions.yahoo.com/new_mail > MODEL ENGINEERING DISCUSSION LIST. > > To UNSUBSCRIBE from this list, send a blank email to, > modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject > line. > > MODEL ENGINEERING DISCUSSION LIST. > > To UNSUBSCRIBE from this list, send a blank email to, > modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line. > MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.