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If you start alusil cylinders for example; K.S. 95mm, they must be bored before they can be plated.One would hope that the boring bar being used can hold tolerances in the .0001" range rather than the .001" range.This also tends me to believe that the Chinese cyls. should be in the .0001 range as well.Don't you think we might be picking fly***** out of the pepper here.As far as just replating insted of boring,I would bet money that if you start with an oval hole you'll end up with one.It is difficult to get a hone not to follow a crooked hole.Even something as sophisticated as a Sunnen CK10 hone.All of the good honing machines I have ever seen or used have a tension dwell meter.This allows the machine operator to view the tight spots in the bore.Tim.
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