So one of my chucks was very hard to operate and I decided it was time. So I watched a couple of cleaning and care of videos on U Tube. One of the presenters suggested using Rem Oil on moving parts when reassembling. Took mine all apart, cleaned real well using toothbrush and compressed air. Reassembled now and working just fine. But it got me to thinking and I was wondering if other woodturners are using a lubricant when reassembling. Seems like I read somewhere years ago that it was not a good practice to use lubricant on a chuck. Apparently this oil dries and so leaves no residue behind to collect sawdust, wood chips, etc. But does provide a "slick" surface for mating parts that slide together. Your thoughts?