Reamer

[TomG]

Boring would be the prefered method for a cylinder bore, over reaming. The hole will be more consistent, and should have a better surface finish. Get yourself the type of bar that uses square HSS tool bits and grind the bit just as you would grind it for turning. Get the biggest bar you can for rigidity, probably 3/4' for a 1" bore, and take some practice runs to get the technique down. My guess is you were probably using pre-ground carbide boring bars, which are tough to get a good finish with. Also make sure you aren't using low carbon steel for the cylinder. You'll never get a good finish with that.

Tom