I have an import albrecht type keyless 5/8 chuck that had less than .001” runout when I first bought it. Used it a couple of times and it has been sitting in a drawer for over a year. Took it out a few days ago as I needed to switch between 1/8” tools and 13mm+ larger drill bits and the runout is now over .003”…usually not a problem for drilling it’s just annoying since I’m using small center drills to locate holes from transfer punches and I can see the runout as I rotate the chuck by hand. Again, not a huge deal, just wondering why the runout would increase so much and if there’s anything I can do to improve it. I’m fairly certain there is no corrosion since the chuck was properly stored…would it be worth it to try and take the chuck apart to inspect? Any other tips with these chucks to get a decent runout?