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Barrel Arbour Screws


Legarm

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I've had two consecutive watches, that on servicing, the barrel arbour screw has sheared off in the arbour, this is the first time this has happened. One of the movements had no identifying calibre, except the letter "M", the dial on the watch denotes it as a REGENCY. The second is an, AS 1123, I managed to purchase another arbour from cousins, but the first one is stuck fast. 

Any ideas......

Edited by Legarm
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I thought of using a watchmakers screw extractor. First you would have to soften the arbour by heating it, the drill through the pinion on the other side leaving enough wall thickness for the pinion still to function. You would now be able to use the extractor that grips the screw at both ends. A bit of a long shot, but it is a possibility.

If successful, you would then have to harden and temper the arbour before fitting to the watch.

http://m.youtube.com/watch?v=hQ7HWCCRATY

I saw this on another forum, it gives you three possibilities.

post-124-0-17178000-1411208044_thumb.jpg

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    • Now thats a real man's tool press 👍. I have one just like it in my back garden for when just CANT fix a watch . Its not something i have had to do yet, @Waggybut wouldn't any type of press be able to do this ? What about an adapted chain link  extractor work or a micrometer with some sleeve pushers made to slot over the ends. @Waggy Found something that could work Scott, comes with different size pins and pushers. Only bit that would need making is a round former to support the inside of the case, a piece of stout timber, bit of oak or mdf might do it. What i like about this one is the pin is pushed in, its in a sliding sleeve so it doesn't turn while its being driven. This has 4 pin sizes and 3 stumps as well so it will come in for other applications, the pins could be adapted to take other accessories from jewelling tools. I've just ordered one myself for some play time. 
    • So I purchased this one based on my case number being listed. (Unless my case number is incorrect. The last digits are faint)
    • I have the same tool from AliExpress and get the same anxiety when when using it. But you have to admit it looks awesome on your tool shelf. Makes you look like a pro. 🤣 Looking at the photo of the Horotec tool, it looks equally flimsy. It probably comes from the same factory. I was thinking of using the pushers supplied with the tool and making a hand tool from a cranked jeweller's punch. I'll grind off the tip of the punch and drill a hole at the end to fit the pusher in. The cranked shank would be able to clear the watch case give a straight in-line axis to exert force to tap the pendant tube out. Should be robust enough to last several lifetimes. I wonder why nobody makes it. 🤔
    • It reminds me of Ukrainian eBay sellers of Russian watches. More often than not the listings include the phrase "Serviced by Master Watchmaker". Of course, they never are, and it should be expected. It's the most corrupt country in Europe, definitely on par with Russia. Today our tiny country (Sweden) sent them another $1 232 255 518 with no accountability whatsoever for how the money will be used.
    • Now that is taking it a bit far. You are going to need a bloody big workshop.  
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