Jump to content

Best method to flatten and "coned" hairspring

rduckwor

By rduckwor
in Watch Repairs Help & Advice

 Share

Recommended Posts

yankeedog Distinguished Member

yankeedog

Posted
Posted

ooooh…..I hate that.it's bent….. you're going to have to remove it from the balance cock and see how and where. then you are going to have to correct it. hopefully  without damaging it further ,there are videos on this.its a very ticklish operation.

Link to comment
Share on other sites
BUSAKAZ WRT Addict

BUSAKAZ

Posted
Posted
Looks like someone got a bit ham-fisted with the balance and the hairspring is now "coned" rather than flat.  How do you deal with that issue?
 
Thanks,

RMD

Take the hair spring off the balance wheel and pull it in the opposite direction baby steps as you go.


Sent from my iPhone using Tapatalk
Link to comment
Share on other sites
clockboy Distinguished Member

clockboy

Posted
Posted

As oldhippy states this is a difficult task and all have their issues. I have had a lot of success by removing the hairspring and then putting it on a balance tac and gently pushing down the HS it the raised area. I have found that very often it is the most inner part of the HS that has bent.

Link to comment
Share on other sites
Nucejoe Distinguished Member

Nucejoe

Posted
Posted

Best method to flatten a coned H/S is to replace it with a new one.

You work on coned h/s,  in five years time you can,t see the spring without a loup,

Within ten years you will need a loup to get in your car and within fifteen two loups to see your house.

 Joe

  • Like 1
Link to comment
Share on other sites
 Share
Go to topic listing


  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • Endeavor
      New balance staff not riveting to balance

      By Endeavor · Posted

      The whole process and the progress are closely observed, it's hand-driven and very controlled. I can't see the "danger", unless you are watching the TV while doing it. As you could have read, and in this quote "wheel" is the balance-wheel.
    • Mercurial
      AS2063 - hand setting

      By Mercurial · Posted

      Have you got the pallet fork installed in the movement when you see the train move when using the setting works? As nevenbekriev said, without the pallet fork to lock the train, the behaviour you are describing is normal. If this is happening with the pallet fork installed, you have a problem in the gear train, it should be immobile when the pallet fork is locking the escape wheel.  The fit of the circlip above the pinions on that wheel is crooked in your pictures, it should sit flat up against the upper pinion as in Marc’s picture.  Hope that helps, Mark
    • Khan
      Stem broken - can it be rescued?

      By Khan · Posted

      Hi I got a Jaeger LeCoultre K911 movement, where one of the stems was broken. Part no. Should be 401.  Im based in Europe and tried Cousins but its discontinued. They except to get stem in stock for cal. K916 but will that work? Or Is there a way out to join the ends?
    • Bonefixer
      AS2063 - hand setting

      By Bonefixer · Posted

      The part was how it fell out of the movement - the train wheel bridge wasn’t screwed in.    I’ll probably dismantle the part, if I can, to work it out.    The train of wheels ran fine - it was only once the keyless works were installed I noticed the problem. 
    • mthomas828
      Balance staff sourcing?

      By mthomas828 · Posted

      Hello, I am about 5 months into watchmaking and I love it!   The attention to precise detail is what really attracts me to it. (and the tools!) I am working on a 16 jewel 43mm pocket watch movement.   There are no markings besides a serial number (122248) .  The balance staff needs replacement. The roller side pivot broke off.  I successfully removed the hairspring using Bergeon 5430's.  I successfully removed the roller using Bergeon 2810.   Did i mention I love the tools?! I removed the staff from the balance wheel using a vintage K&D staff removal tool  with my Bergeon 15285 (that's the one that comes with a micrometer adjustment so it can be used as a jewel press as well as a traditional staking tool...it's sooooo cool...sorry..  can you tell i love the tools?) No more digressing..  I measured the damaged staff in all the relevant areas but I have to estimate on some because one of the pivots is missing. A = Full length  A= 4.80mm  (that's without the one pivot...if you assume that the missing pivot is the same length as the other pivot (I'm sure it's not)  then A = 5.12 mm...(can I assume 5.00mm here?) F=  Hair spring collet seat  F=  .89mm   (safe to assume .90 here? .. I am sure that my measurement's would at least contain  .01 mm error ?) G = balance wheel seat  G = 1.23 mm  (1.20mm?) H  =  roller staff  H =  .59mm  (.60 mm?) B  = bottom of the wheel to roller pivot   B  = 2.97mm  (3.00 mm?)     here I am estimating  again because this pivot is missing. So my friends, and I thank you profusely,  can you point me in the right direction as to how to proceed? Do i buy individual staffs?  or an assortment?   Since I don't know exactly the name of the manufacturer, will that be a fatal hindrance?   Tbh, I'm not even sure what country of origin this movement is. Thank you!    
×
×
  • Create New...