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  • Choosing a new hairspring - NAWCC Forums
    How does one choose the best replacement hairspring for a movement? I'm working on a mini Mauthe time only movement (a novelty style) The mainspring was completely destroyed; all that remained on the balance wheel was the collet and a shred of the old spring I used a copper hairspring from
  • Balance cock, hairspring, regulator and balance - NAWCC Forums
    If the hairspring is significantly outside the gap, or resists going into the gap, it needs work, and I curse my rotten luck!!! Lately I've taken to putting this all together dry, and putting just the balance and cock on the pillar plate before anything else
  • Hairspring Overcoil - NAWCC Forums
    Maintaining a hold on the hairspring lower the balance so the lower pivot rests on the upper end jewel on the running watch so that the balance sits horizontally (The hairspring should still be stretched some) Use an artists paint brush (camel hair is good) to brush the balance into motion Compare the rotations of the two balances
  • How to source a hairspring for a Waltham pocket - NAWCC Forums
    Finding a replacement hairspring that will be perfect in every way will be difficult You may have to go with a balance complete from a donor watch Estheticly, that process is flawed since most American watches had the movement serial number scribed under the balance arms But if it is possible to do, it might get the watch running for you
  • What size hairspring to order? - NAWCC Forums
    Flat hairspring use a regulator that is opened and closed with a small screw driver You turn the balance cock upside down and turn the screw 90 degrees and the regulator loop is opened up so the hairspring can come out On the overcoil, it's just two pins So now you choose the appropriate collet and hairspring and insert the collet
  • How do I flatten out a conical hairspring? - NAWCC Forums
    The hairspring assumes a conical shape when the cock balance is installed, which rubs on the balance When the cock balance is out of the watch, the spring is flat The 'at rest' position of the balance is exactly right when out of the watch, i e the pin corresponds to the center of the lever travel But it becomes conical when installed
  • Hairspring -2 tweezers twist method. . . ? | NAWCC Forums
    Hello all Just been mulling over how to improve hairspring bending methods This has more to do with how to handle "true in the flat" Say for example you have a hairspring that has a couple of coils off the flat plane and they need to be twisted back by typical method of 2 tweezers twist
  • Vibrating A Hairspring - NAWCC Forums
    This is done to fit a new hairspring to a watch The new spring is attached to the balance and caused to swing back and forth as it is compared with another balance of known correctness They should swing the same number of times, or vibrations and the same degree All of which is an
  • hairspring collet - NAWCC Forums
    hi, i have a hairspring which matches one which is broken, the trouble is the the collect is to small in diameter to fit the balance staff, what is the best method to enlarge the inside diameter , without removing hair spring, as it looks rubbed in and most likely break or do i turn down the
  • Reattach hairspring to balance cock - NAWCC Forums
    Hey all I’m new to repairs and have a Medana watch with an MST 359 movement and the balance wheel and spring are disconnected from the balance cock Is it a difficult thing to reattach or fairly easy?





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