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rodabod

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Everything posted by rodabod

  1. rodabod

    Question about jeweling

    1. You’ll struggle to get the end-shakes correct and potentially push too far if you just use a staking set. The only time when it can be ok is when you insert a jewel which is to sit absolutely flush with a plate/bridge/cock as you just use an oversized punch. Note that you need different tools for “rubbed in” jewels (setting opener / closer). 2. It’s worth getting hold of scrap movements. Otherwise job lots of jewel selections appear on eBay. Apparently you can buy Chinese-made synthetic jewel selections but the colour may not look correct on your antique pieces. 3. A reamer is just a cutting broach, but in the case of a Seitz it will look short and have a fitting such that it can be held in the tool. A pusher is the end-piece which fits the plunger and is chosen to suit the jewel size. Have a look at an online scan of a Seitz accessories catalogue or similar.
  2. rodabod

    What Could Be Causing Low Amplitude

    Is that entry pallet stone chipped, or am I just seeing oil?
  3. rodabod

    Omega cal.t17 help

    That looks pretty good. You escape wheel may be a bit eccentric, or worn, but if it keeps good time, then it keeps good time!
  4. rodabod

    Omega cal.t17 help

    Well, the rate of oscillation is drastically increased, so if it's not knocking then I would inspect the hairspring for touching anything as it breathes open and closed. Is it very sudden when the rate increases? If re-banking then it usually suddenly happens at a given maximum angle of rotation which will be in the region of 330 degrees. Is your lift angle set correctly too?
  5. rodabod

    Omega cal.t17 help

    Looks like it could be re-banking. Does it sound like a galloping horse when it runs really fast like this?
  6. rodabod

    What Could Be Causing Low Amplitude

    The end shake in the video does not immediately appear bad. However, I’d be more interested to see the balance rim moving rather than the end of the pivot as it’s difficult to judge by looking at the pivot.
  7. rodabod

    Question about balance problems

    My heart sinks when I see marks underneath the balance cock. They are also called “pigs’ ears” sometimes. Very common on anything pre-1960.
  8. rodabod

    Jewelling question

    One thing to check (which you may have already done) is the hole size (which then corresponds to side-shake) when you selected the new jewel. You can simply take the relevant wheel and sit its pivot in the new jewel hole and observe the angle which the pivot is permitted to move from side to side. You can judge this by eye.
  9. rodabod

    Jewelling question

    The action of the punch (pusher) is possibly best shown by Seitz' own drawing:
  10. rodabod

    Jewelling question

    I think the "fake chatons" and general attempts to show off generally dates to earlier in the century when customers were more likely to see the watch movement in the shops, especially if it was a shop-built watch made to order. It was common back then to choose a particular movement and have it mounted in a standard caselike a Dennison model, for example. One other thing you sometimes see is an enlarged cap jewel which is visible when looking at the balance cock, yet the cap jewel fitted to the plate is much smaller. Purely cosmetics to "wow" the customer. Then in the 1970's we have the fight for maximum jewel count, with superfluous cap jewels everywhere.
  11. rodabod

    Jewelling question

    I'd use Nickelsilver's suggestion of closing using a domed pusher in your jewelling set.
  12. rodabod

    What Could Be Causing Low Amplitude

    With crappy amplitiude, I usually start looking at the fast end of the train, and test the balance wheel for freedom and end-shake first: Remove pallets and excite the balance until it starts to oscillate. Does it take a reasonably long time to gradully stop oscillating? Then, with a fine oiler or tweezers, push the balance wheel while static upwards and downwards and judge the amount of shake by eye. If that all looks ok, then remove the balance and inspect the locking/unlocking of the lever.
  13. This is good advice, and a simple test to confirm if the train is stopping rather than an issue with the motion works and the friction coupling for hand setting.
  14. rodabod

    IWC 66 Finger piece.

    Make sure you polish the “beak” on the edges where it interacts with the Maltese cross.
  15. rodabod

    Help needed for some advice....

    Oh, and remember to make it stainless! Most of the material I work with is carbon steel as it’s more common for clock making work.
  16. rodabod

    Help needed for some advice....

    You shouldn’t have much difficulty in getting someone to do this if you can find the right person. If I had more time then I’d offer to do it, but I certainly don’t. It would be quite simple to make on the lathe with some rod.
  17. rodabod

    Help needed for some advice....

    Is the pendant tube threaded inside for the crown to screw down onto, or does it screw against the small stud? Should be easy to turn on a lathe.
  18. rodabod

    IWC 66 Finger piece.

    That dial and hand set are stunning. Personally, i’d wait for a scrap movement if you can.
  19. rodabod

    Loose roller on new balance staff

    I had this same issue last week when replacing an Omega staff with a Ronda replacement. The roller just didn’t grip. So, as Busakaz suggests, tap it with a domed punch. I tapped the narrower side and this gave a firm grip. Just do it gradually, and give the punch a twist to make sure it is centred over the hole ok. Regarding the punch, what matters is the radius of the dome. It’s likely that one which is a little larger than the hole should be ok.
  20. rodabod

    Venus 170 Watch Hands

    On seconds and sub-dial hands, you can sometimes just use a needle to broach the pipe open.
  21. rodabod

    Venus 170 Watch Hands

    Ranfft lists them as: 2.05 x 1.30 x 0.22 / 0.28 x 0.20mm the ones after the "/" are the sub dial hands.
  22. rodabod

    Venus 170 Watch Hands

    You need the hole sizes. And then you need to know the length measured from the hole to tip. Hole sizes can be adjusted slightly using broaches and a jewelling set.
  23. rodabod

    Large variations in rate

    I should have also added to check that the hairspring and movement are not magnetised. The only other time I can remember experiencing an extreme gain in rate other than "knocking the bankings" (due to excess amplitude) was when I had a safety roller which wasn't playing ball with the pallet that caused a similar effect by causing the balance wheel to immediately bounce back every time it swung in one direction.
  24. rodabod

    Large variations in rate

    +900s? I'd be looking at the hairspring first. Make sure it is clean and that none of the coils foul each other or anything else.
  25. rodabod

    Where can I get such a crystal?

    That is excellent. Thanks.
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