Hi, I am having some issues with my counterbores. I am using a 3/16 pivot and i need to use a counterbore to get a .500" pocket for my bearings. I am using a carbide tipped c/b from ti connector. I am drilling my holes to .185 and reaming to .1875. My pivot barrels seem to fit properly in my reamed holes. When I go to use the counterbore it seems like the removable pilot is expanding and getting caught in the hole. I snapped one earlier today in the pivot hole. I ordered another from mcmastercarr to see if i had better luck. Theirs is flawed in design and wont ever work. Ill post pics below. I have a 3/8 c/b also from ti connector and it cuts much better. I am wondering if maybe there is an issue with the .500 one either from factory or from myself. It requires way more pressure than the 3/8 one and wont cut hardened steel at all. Im not sure if this is normal. I am running at 330rpm in my mill under constant coolant from a mister. I am wondering if anyone has any ideas or suggestions. Im a bit stuck. I will likely buy another from ti connector and see how it goes. These are getting expensive. I dont really want to oversize my holes. I dont want any lash if avoidable. What size are guys running there holes for pivots? Any ideas on why the pilot is getting stuck. It moves in the hole fine prior to starting and seems to swell while spinning inside. Thanks for reading.