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  1. R

    Positional error

    As I have said previously, I'm a hacker. I didn't have the benefit of going through a watch repair school or having a long working career swapping parts in a manufacturers service facility with regular training and updates/materials/guidance. You, and a lot of others here as well, obviously...
  2. R

    Removing a Hairline Crack

    Hide it underneath a very large and heavy object? I'm thinking a 40 lb solid gold brick would do it, nobody would notice the crack then.
  3. R

    American PW Elgin Balance Staff Replacement

    Since I made the tweezer, I've yet to bork a hairspring when removing it from the staff on any balance from 18s down to 6s. The tweezer shown doesn't fit balances smaller than 6s because the tips are too long to allow it to fit inside the rim. I have another tweezer that's similar with shorter...
  4. R

    American PW Elgin Balance Staff Replacement

    DON'T PULL THE PIN!!! Loosed the screw on the balance bridge and push the triangular stud out the bottom. The hairspring should slip out from between the pins on it's own or with a little manipulation of the pins to separate them. Use a single edged razor blade between the pins to open them...
  5. R

    American PW Waltham 1890 'Strange' Balance Wheel Behavior

    Looked at your photos. The balance has obviously been cleaned because there's no visible crud on it any longer. Good. The pics in "photo E" show the fork and the roller jewel. Sticking up from the fork is a brass pin. That's the safety dart and it prevents the fork from moving except when...
  6. R

    American PW Waltham 1890 'Strange' Balance Wheel Behavior

    And another thing; verify while the balance and jewels are out that the pivots fit the jewels.
  7. R

    American PW Waltham 1890 'Strange' Balance Wheel Behavior

    I finally had some time to watch your video. Check the safety dart / roller table clearance. It might be too close.
  8. R

    Positional error

    I do have more amplitude in the dial positions (270*+) but I get decreased amplitude AND rate in the pendant positions. Which is backward. With decreased amplitude I should get a higher rate unless the balance speed is also way down. There's enough drag in the pendant positions that it won't...
  9. R

    American PW Waltham 1890 'Strange' Balance Wheel Behavior

    I would pull the hairspring and verify it's centered and flat. One of your pics make it appear that it's not centered over the bridge jewel. that will "pull" the balance off center and cause a lot of drag. It is dirty, and there's visible dirt under the cap jewel in the 1 pic, but it should...
  10. R

    Positional error

    I used my truing calipers and truing tool. The noise is gone but there's still drag in there somewhere, the numbers haven't improved at all. I'm going to pull it totally apart and see what I can find.
  11. R

    Positional error

    Your math is correct. I started digging and I found that if all the dominoes were aligned right, one tip of the balance rim at the split would *just barely* touch the edge of the barrel after everything shifted from the change in position and clearances altered. I could see light flash in the...
  12. R

    Positional error

    I'm not going to touch the balance because it doesn't need it. There is a "tonal change" from dial up/down to pendant positions. I'm not musical but to me it sounds like a wood block or cowbell being struck with a drumstick when pendent up/down/sideways. Tunk tunk tunk tunk. It's in time...
  13. R

    Positional error

    I'm sure I read about how to reduce positional error but I can't remember. I'm asking because I have an 18s 15J Elgin which, dial up or down, has a rate around 18020+. All pendant positions return a rate around 17975+/-. How do I close that gap?
  14. R

    My Dresser Top secret drawer

    Or so you think... The cat likes Rodico so much I can't leave it on the workbench even when I'm working on a watch. I'll need it and reach for it and it won't be there. Glance over the shoulder and there goes the cat with a blue / green blob in it's mouth. Anyway, back on topic. I'm...
  15. R

    Bow Pliers

    The pliers you show in your pic are designed to (re) shape the bow. They're not the tool for installing one. For that you need something like these: You can buy new bows for your Bunn Sp.
  16. R

    My Dresser Top secret drawer

    I figured it was cheaper to blame the cat than rent space on the side of a milk carton... have you seen this watch?
  17. R

    Post some of your project watches

    Some of mine: This is my main drawer of things to be fixed. Lots of busted stuff in there all waiting patiently for me to break them some more. Drawer #2. Most of these have been serviced but need something like a case or crystal or something. There's a Bunn Sp in there that needs...
  18. R

    Question for the collective wisdom of the board

    Well at this point it doesn't matter since I just snapped the hairspring. Sucks but I'll fix it. I can do this. I've done it before, I can do it again.
  19. R

    Question for the collective wisdom of the board

    But what's the likely cause? It's obvious that dial up there's enough drag to slow amplitude and make it run fast. Yet the pivots are fine. Although the balance comes in a couple of hundred thou short from spec, there's no excessive end shake. The jewels are perfect and I checked them on the...
  20. R

    Question for the collective wisdom of the board

    I have a zero size 15J Elgin that's driving me nuts. Dial down, I get a smooth and consistent 18020 - 18025. It's fast but I can deal with that. The problem is as follows: Pendant up - 17855 Pendant 3, 6 9 o'clock - 17885 to 17915 fluctuating in each position. Dial up - 18255 Nothing is...
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