EXTRACTING SHARP EDGES
I like to chamfer the sharp edges on lifter bores after shotblasting blocks. I use a spiral flute extractor and just rotate it clockwise a few times with my fingers to remove any peened over edges. I find that it works better than a lot of my chamfering tools. 

Dave Matton 
D and D Auto Machine 
Bloomington, MN
JAN, 2022