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happymech -- Micrometer locks have been known to tighten themselves just sitting in a tool box, so it would probably be a real good idea to make sure that the lock is released before you get too far into your micrometer. If the lock is loose and the spindle still doesn't want to turn, you'll want to get some penetrating solvent into the frame's bore and threads. You say you've already taken off the thimble, and that's a start. Have you got the adjustment wrench? If so, loosen the nut that tightens the female thread onto the spindle to make some room for the solvent. Although Kroil or PBlaster are fine penetrating fluids, they stink to high heaven and I'd be inclined to go with a less agressive solvent at first. A 4:1 mix of mineral spirits to hydraulic oil (or Dexron-spec ATF) would be my choice. Then I'd let it soak for a day or two, preferrably in a warm place. If, after soaking in a solvent lube, the spindle didn't turn freely, I'd work the spindle back-and-forth for a bit while holding the micrometer in the solvent lube and then let it soak another day or so. Since it does move a bit now, I'd be very surprised if it wouldn't free up with the solvent-and-lube soaking. John
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