Review on Cutting-Edge Reamer Machine: Unrivaled Precision and Efficiency with Straight Chucking Milling by Dave Rasic

Used 8mm reamer for 8mm precision bore. The hole turned out to be 8.05 mm. At first I thought maybe I set the feed or speed wrong, or maybe I have spindle run out. I ended up measuring the development and saw it was around 8.05-8.07mm! Definitely not within the H7 specification. Maybe enough to just enlarge a hole, but definitely not for precision holes. Definitely not an H7.