GB Torsion in for repair

Discussion in '400-Day & Atmos' started by Les Sanders, Oct 5, 2019.

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

    Les Sanders Registered User
    NAWCC Member

    Apr 3, 2010
    631
    7
    18
    Clock Repairman
    Sahuarita Arizona
    Country Flag:
    Region Flag:
    A customer GB Torsion clock. A couple of quick questions Age and the anchor pin. The serial # is 2281995 Freiburg. The anchor pin appears to be broken off Dang it! best way to remove and replace the anchor pin.

    MVC-001L.JPG MVC-002L.JPG MVC-003L.JPG MVC-004L.JPG MVC-005L.JPG MVC-006L.JPG
     
  2. Les Sanders

    Les Sanders Registered User
    NAWCC Member

    Apr 3, 2010
    631
    7
    18
    Clock Repairman
    Sahuarita Arizona
    Country Flag:
    Region Flag:
    Well I have it apart and the anchor pin had been glued in at some point, why not I will remove the glue and go from there. The old anchor pin is not threaded. Gives me pause was it ever threaded?
     
  3. etmb61

    etmb61 Registered User
    NAWCC Member

    Oct 25, 2010
    2,186
    91
    48
    Retired Avionics Technician
    Mascoutah, IL
    Country Flag:
    Region Flag:
    #3 etmb61, Oct 5, 2019
    Last edited: Oct 5, 2019
    Hi Les,

    About half of my Beckers have the pin soldered in place. Those that have not been disfigured have no exposed threads I can find. I tried to turn the pins out on two of those clocks with a pin vise but they would not budge. I think they are pressed in.

    I would say 1913-1914 for that serial number.

    Eric
     
  4. tracerjack

    tracerjack Registered User
    NAWCC Member

    Jun 6, 2016
    754
    43
    28
    Female
    Lodi, CA
    Country Flag:
    Region Flag:
    I wonder why the anchor pins are factory pressed in so tightly? I wouldn't think there would be that much stress on it. The 400 day Guide book says they can be drilled out if not hardened. Doesn't say what is to be done if hardened.
     
  5. Les Sanders

    Les Sanders Registered User
    NAWCC Member

    Apr 3, 2010
    631
    7
    18
    Clock Repairman
    Sahuarita Arizona
    Country Flag:
    Region Flag:
    Well they are hardened, they were pressed in to a brass collar so I am going to make a collar out of brass rod stock put a .040 anchor pin in and see what I have when it is finished.
     
  6. etmb61

    etmb61 Registered User
    NAWCC Member

    Oct 25, 2010
    2,186
    91
    48
    Retired Avionics Technician
    Mascoutah, IL
    Country Flag:
    Region Flag:
    So I guess the alum bath method doesn't work on hardened steel?
     
  7. Les Sanders

    Les Sanders Registered User
    NAWCC Member

    Apr 3, 2010
    631
    7
    18
    Clock Repairman
    Sahuarita Arizona
    Country Flag:
    Region Flag:
    Not sure what the Alum Bath Method is?
     
  8. etmb61

    etmb61 Registered User
    NAWCC Member

    Oct 25, 2010
    2,186
    91
    48
    Retired Avionics Technician
    Mascoutah, IL
    Country Flag:
    Region Flag:
    If you make a saturated solution of hot water and pickling alum (from the market spice section) in a glass container, you can soak a brass part with an iron part stuck in it to dissolve the iron part. The alum and hot water makes a weak sulfuric acid solution that eats away the iron.

    Alum - Wikipedia

    You would need to remove the collar form the arbor and soak just the collar.

    Eric
     
  9. Les Sanders

    Les Sanders Registered User
    NAWCC Member

    Apr 3, 2010
    631
    7
    18
    Clock Repairman
    Sahuarita Arizona
    Country Flag:
    Region Flag:
    Thanks Eric, I am getting ready to remove the collar I will try this method. Added a picture!

    MVC-007L.JPG
     
  10. shutterbug

    shutterbug Moderator
    NAWCC Member

    Oct 19, 2005
    40,134
    604
    113
    Male
    Self employed interpreter/clock repairer
    Iowa
    Country Flag:
    Region Flag:
    Be careful. You don't want to expose the arbor or pivot to the alum.
     
  11. Les Sanders

    Les Sanders Registered User
    NAWCC Member

    Apr 3, 2010
    631
    7
    18
    Clock Repairman
    Sahuarita Arizona
    Country Flag:
    Region Flag:
    I understand I have removed the collar from the arbor, but I have one question how strong should I make the solution?
     
  12. KurtinSA

    KurtinSA Registered User
    NAWCC Member

    Nov 24, 2014
    3,082
    87
    48
    Aerospace Engineer (Ret.)
    San Antonio, TX
    Country Flag:
    Region Flag:
    I've never done this before, but found references to a "high" concentration of alum in water. Harry posted that he kept putting alum into the water until it wouldn't dissolve any more crystals:

    Kundo Pin Pallet Escapement

    Kurt
     
  13. etmb61

    etmb61 Registered User
    NAWCC Member

    Oct 25, 2010
    2,186
    91
    48
    Retired Avionics Technician
    Mascoutah, IL
    Country Flag:
    Region Flag:
    As Harry said in Kurt's link, keep adding the alum until no more will dissolve. Also keep the solution hot and it works faster. You should see bubbles forming on and rising from the iron part.

    Eric
     
  14. Les Sanders

    Les Sanders Registered User
    NAWCC Member

    Apr 3, 2010
    631
    7
    18
    Clock Repairman
    Sahuarita Arizona
    Country Flag:
    Region Flag:
    So I fixed the anchor pin parts of the base are brass colored or plated, how to make them look polished? It would need to be a tinted clear like a toner.
     
  15. etmb61

    etmb61 Registered User
    NAWCC Member

    Oct 25, 2010
    2,186
    91
    48
    Retired Avionics Technician
    Mascoutah, IL
    Country Flag:
    Region Flag:
    The top center pan of the base is brass plated steel, as are the centers of the support columns. The rest is all brass. If the plating isn't too damaged you can gently polish it. Yours really doesn't look too bad. Here is one I did some time ago that was much worse:

    before_n_after.JPG

    Eric
     
  16. Les Sanders

    Les Sanders Registered User
    NAWCC Member

    Apr 3, 2010
    631
    7
    18
    Clock Repairman
    Sahuarita Arizona
    Country Flag:
    Region Flag:
    The rim part were the dome sits is rusted so I cleaned it up masked the polished surface and painted the rim part it looks great!
     
  17. MartinM

    MartinM Registered User

    Jun 24, 2011
    2,944
    78
    48
    Male
    Medical Insurance Systems Analyst
    El Dorado, CA
    Country Flag:
    Region Flag:
    Nikolas makes a gold tinted lacquer that works well to give silver metals a brass look.
     
  18. Les Sanders

    Les Sanders Registered User
    NAWCC Member

    Apr 3, 2010
    631
    7
    18
    Clock Repairman
    Sahuarita Arizona
    Country Flag:
    Region Flag:
    Check out the finished product and let me know what you think!

    MVC-012L.JPG MVC-013L.JPG
     
    Wayne A likes this.
  19. shutterbug

    shutterbug Moderator
    NAWCC Member

    Oct 19, 2005
    40,134
    604
    113
    Male
    Self employed interpreter/clock repairer
    Iowa
    Country Flag:
    Region Flag:
    Looks good!
     
  20. etmb61

    etmb61 Registered User
    NAWCC Member

    Oct 25, 2010
    2,186
    91
    48
    Retired Avionics Technician
    Mascoutah, IL
    Country Flag:
    Region Flag:
    Excellent!
     
  21. Les Sanders

    Les Sanders Registered User
    NAWCC Member

    Apr 3, 2010
    631
    7
    18
    Clock Repairman
    Sahuarita Arizona
    Country Flag:
    Region Flag:
    Thanks Guys getting ready for assembly and testing & adjusting.
     
  22. KurtinSA

    KurtinSA Registered User
    NAWCC Member

    Nov 24, 2014
    3,082
    87
    48
    Aerospace Engineer (Ret.)
    San Antonio, TX
    Country Flag:
    Region Flag:
    Nice reflection of the columns in the surface of the base!

    Kurt
     
  23. Les Sanders

    Les Sanders Registered User
    NAWCC Member

    Apr 3, 2010
    631
    7
    18
    Clock Repairman
    Sahuarita Arizona
    Country Flag:
    Region Flag:
    Well back together but not running very well, I checked the suspension it is .0027 I thought it was around .004 anyone have that correct information?
     
  24. KurtinSA

    KurtinSA Registered User
    NAWCC Member

    Nov 24, 2014
    3,082
    87
    48
    Aerospace Engineer (Ret.)
    San Antonio, TX
    Country Flag:
    Region Flag:
    Yes, from memory the GB should be 0.004".

    Kurt
     
  25. Les Sanders

    Les Sanders Registered User
    NAWCC Member

    Apr 3, 2010
    631
    7
    18
    Clock Repairman
    Sahuarita Arizona
    Country Flag:
    Region Flag:
    Thanks Kurt. A .004 it shall be!
     
  26. shutterbug

    shutterbug Moderator
    NAWCC Member

    Oct 19, 2005
    40,134
    604
    113
    Male
    Self employed interpreter/clock repairer
    Iowa
    Country Flag:
    Region Flag:
    If it's running way slow, then the suspension spring is the issue. Otherwise it has no effect on the clock running or not running.
    In fact, it should run easier with the thinner spring.
    Save that change for last. Check for beat and over swing first.
     
  27. Les Sanders

    Les Sanders Registered User
    NAWCC Member

    Apr 3, 2010
    631
    7
    18
    Clock Repairman
    Sahuarita Arizona
    Country Flag:
    Region Flag:
    The .004 is working great, running a 2 week test, I did trim the .004 about 3/16" the disc was dragging on the back screw. The spring that was on the clock was a .0027 I knew that was not correct!
     

Share This Page