Electric WW Rewinding ESA9162 T coils: success

Discussion in 'Watch Repair' started by Chris Radek, Dec 31, 2018.

  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  1. Chris Radek

    Chris Radek Registered User
    NAWCC Member

    Apr 13, 2014
    441
    135
    43
    Male
    Watchmaker (now accepting new customers)
    Lincoln, NE, USA
    Country Flag:
    Some of you might know I've been rewinding Accutron 214 coils for a while, but today I had my first success rewinding an ESA9162 T coil and it is running. These use much finer wire than the 214 coils. The winning formula is: sense coil 1260 turns giving 1.68kohm; drive coil 5040 turns giving 7.48kohm. I'm winding at about 0.17 cN tension (vs 0.34 for the Accutrons). Run current is about 8uA.

    9162t.jpg

    Yes that's 6300 turns of wire! If any of you know where I could find a pile of duds please let me know!
     
    SmithyMoarra likes this.
  2. David S

    David S Registered User
    NAWCC Member

    Dec 18, 2011
    7,095
    186
    63
    Male
    Professional Engineer - Retired
    Brockville, On Canada
    Country Flag:
    Region Flag:
    Nice going Chris. What gauge wire are you using?

    David
     
  3. Chris Radek

    Chris Radek Registered User
    NAWCC Member

    Apr 13, 2014
    441
    135
    43
    Male
    Watchmaker (now accepting new customers)
    Lincoln, NE, USA
    Country Flag:
    It's a little smaller than AWG #56 (12 micron or 0.00047 inch). The Accutron coils use 15 micron.
     
  4. itspcb

    itspcb Registered User
    NAWCC Member

    Aug 6, 2006
    540
    0
    16
    Retired
    UK
    Country Flag:
    Region Flag:
    That's a brilliant result. May I ask what tooling/setup you use?
    Peter
     

Share This Page