HIT YOUR MARK
Here is a trick I use when I am boring for sleeves, line boring mains or any other type of boring where I absolutely must to hit my size and tolerance is tight. Prior to removing the tool on your 2nd to last cut, set up a mag base and a tenth indicator. Sweep your tool bit and zero the indicator. Remove tool and set to size on your boring machines setting fixture. When you put the tool bit back into boring head, sweep the tenth indicator again and it should read exactly 1/2 the amount you want to bore. Doing this will insure you that it will cut exactly the amount you want, every time.

Nick Jones
Automotive Machine
Fraser, MI
January, 2021