I used to calibrate these micrometers in the Navy and this weekend i had to take a 'YouTube class' just to remember how to read the dam things. Anyway, please tell me what you think of the measurements i came up with. Maybe just a hone and new rings? FYI, i did take a minimum of 3 readings at each location and went with average.


Old school tech

 

All depends on what bores look like too....not just the taper or wear.

 

they were done on a end hone by hand and its not what we use to do cylinders 35 years and more - we use a CK 15 you dial the bore and stroke into the machine and the cross hatch is computed out with the rod stroke angle to 60 degrees

having said that its close in the hand hone world - ball hone it with 120 grit - 10 or 15 times each to brake the glaze and re assemble