Posted by Greg Coffin [172.68.35.20] on Wednesday, July 13, 2016 at 20:47:33 :
In Reply to: O.T. How to enlarge a large hole slightly? posted by Sherman in Idaho [108.162.245.23] on Wednesday, July 13, 2016 at 11:59:54 :
Take the 2-1/8" sanding drum and wrap a few layers of emery cloth around it to get the right diameter. Turn the drum clockwise as you lay the emery cloth, so it self-tightens onto the drum when you are honing the bore. Cast iron is pretty soft, so it won't take a lot to clean off 0.005".