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Hi all; a fellow watch tinkerer

Fred48

By Fred48
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Fred48 New Member

Fred48

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Posted

Hi all, I took Mark's courses about a year ago, and am hooked. Frustrating yes, but I've learned so much (most of all, what I don't know!). I love to acquire watches not running well or not at all, and try to revive them.

 

Now here's my latest problem:

It's a vintage Ernest Borel that I just can't get out of the case. I've removed the back and the crystal, hands, crown/stem, and all the parts accessible from the back, but the movement will not budge.

 

Any suggestions greatly appreciated.

 

Thanks much

 

Fred

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      By Neverenoughwatches · Posted

      I didn't think pulling to set position would work harden the spring, in that position it is stressed where the arm starts. By work hardening i meant rapid polishing at that point, a bit like polishing a pivot work hardens as it compresses the steel. I doubt polishing by hand would achieve much in that respect though. Its finished, arm polished up mostly at the join to the bridge's main body. I'm ok with it, the screw holes aren't great as i had to open them up by redrilling and positioning it was difficult, I'm not much use with a loupe, opening up with a file might be a better option for me or i could just use the correct drill size 😅. And the detent is way too deep, i had to guess that with the stem release out of position and sat on top, but i only took one measure and went for it, no slowly slowly catch your monkey 😅. First go I'm happy , well sort of, it works and thats a big thing for me, next one will have a bit more finesse.  Anyone thats interested, after filing, i used a 2000 grade home made diamond  micro file and then 20 micron film, the film is much better than wet and dry, more stable to use and doesn't shed cheap grade grit everywhere , then auto polish on a sponge pad.
    • RichardHarris123
      Setting lever spring

      By RichardHarris123 · Posted

      I'm assuming that every time you set the watch you are work hardening the detent spring, maximum hardening is  where it meets the plate due to maximum deflection.   That's why it snaps there.  The Young's modulus may be the same but after it's reached its maximum yeid strength it breaks.  My mechanic engineering is very rusty, correct me if I'm wrong. 
    • Neverenoughwatches
      Setting lever spring

      By Neverenoughwatches · Posted

      Ah ok yes that makes sense to polish it where the arm starts to form from the body of the bridge, i thought you meant the underneath of all the arm.
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