mechanical digital micrometer repair?

Bob:

If all else fails, you can call these guys.

Yes... I figure that the cost would be more than I am willing to spend.

I guess nobody here knows anything about these things.

Thanks

Bob

You might try asking in a watch making group. This is probably more up their alley.

tion at a flea market, on the theory that I might be able to repair it and if not the price was low enough that I wouldn't care too much. It has two p roblems. The cylindrical knurled portion of the thimble is rattling complet ely loose on the main portion of the screw. I could glue it on, but it seem s like there is probably a more civilized repair. I haven't spotted a set s crew for it though. The other problem is that the upper two digits of the c ounter are not working properly. They often do not turn at all, though occa sionally the second digit will rotate one place. The screw does not simply unscrew from the body, as in an ordinary micrometer. I am guessing that I n eed to remove the nut that in an ordinary micrometer would be the tightness adjustment, but I figured I would ask if anyone had experience before I tr ied it. So far I have spotted two other opportunities. There is a plastic s crew at the end of the wide spot in the body above the digits. I don't know what it does. There is also what looks like a hole for a transverse peg or something that has been filled in with glue at the factory. Bob

I've got one of the mechanical digital mikes, finest chink, haven't tried t o dismantle it, though. Your lack of digit advancement is no doubt related to the looseness of the thimble. There's a gear on the anvil shaft that's coupled to a midget Veeder-Root counter for display. On my example, I can see a small segment of a keyway when the shaft is run all the way out(clos ed). I assume that the gear is fixed in position longitudinally and slides on the shaft. As to how it all comes apart, I haven't a clue, mine works. I think I paid like $10 for it off a scratch and dent counter. So probab ly not worth a whole lot of time invested except to answer the question of how it comes apart. The filled hole might be the way the counter is zeroed at the factory, similar to what you need to do to a mechanical dial calipe r to index the pointer on one of those. Poke a wire in and disengage the c ounter. Just speculation on that.

Stan