There was a discussion on pivoting in the Clocks Repair forum which led me to post this there this am. I thought it may be of interest here. Sorry for the double post. I do not soften arbors for repivoting. This is a LeCoultre A/C clock and the wheel is the 4th wheel with a 30/100 mm pivot. Arbor is 1.1mm OD. This had to be done this AM so I thought I would show how to do it with a WW lathe, carbide graver and carbide twist drill. This is a standard twist drill (50/100mm) but I could have broken off a smaller ckt board drill and choked up on the drill itself to reduce overhang and wobble. Took about 5 minutes; but remember this is my bread and butter. This can also be done with a pinvise but remember to control your pressure. Much easier if you have a matched tailstock. Sorry about the "through the looking glass" photos; did not want to set up the SLR. First photos show how I set up to cut the female center. AS you can see, a microscope gives much better working distance and you are not guessing at what you "see". Second series show the setup for actual drilling and how to setup for hole depth (1.5mm here; short pivot that is 30/100). Note the swarf. You need to see what is happening so you can withdraw the drill; if the swarf clogs it will break the drill. Also, high speeds can actually heat the setup so that the drill seizes. Crawling speeds. Second to last photo you may see a line in the eyepiece. This is a reticle that allows me to measure .025 mm increments directly. Makes turning lengths a pleasure. Although I have not really thought about it, I do not see how this work can be done on Sherline lathe.