HERMLE DATE CODES AND YEARS

Discussion in 'Clock Repair' started by doc_fields, Apr 4, 2019.

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  1. doc_fields

    doc_fields Registered User

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    #1 doc_fields, Apr 4, 2019
    Last edited: Apr 4, 2019
    I got tired of using fingers and toes to figure out the Hermle date codes and years, so I quickly made one up so I wouldn't have to remove my shoes and socks to count anymore. I've enclosed a Microsoft Word document for easy printout, hope you find it useful!.............................gary

    Post Script: Noticed two things I should've done after posting this: Should have posted a little credit with my name on it, and if I knew how to do MS Excel or some other high falutin program, I could've made it visibly a little more pleasing to the eyes with even spacing and such. Oh well...........
     

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    NEW65 likes this.
  2. TEACLOCKS

    TEACLOCKS Registered User
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    Thank you I can use this.

    Lloyd Watson
     
  3. doc_fields

    doc_fields Registered User

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    You're most welcome!......................gary
     
  4. Clocks In The Grove

    Clocks In The Grove Registered User
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    doc_fields, I opened my Timesavers catalog #43 to page 174 and the following is the last part of the table listing Hermle Year of Manufacturing:
    X 2011
    Z 2012
    AA 2013
    BB 2014
    CC 2015
    DD 2016
    Doc, why the difference, am I missing something?
    ..Bob..
     
  5. MARK A. BUTTERWORTH

    MARK A. BUTTERWORTH Registered User
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    The Timesavers Catalog is incorrect
     
  6. Clocks In The Grove

    Clocks In The Grove Registered User
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    Thank you Mark for the letting us know that Timesavers is incorrect. Is doc_fields table correct?
    ..Bob..
     
  7. MARK A. BUTTERWORTH

    MARK A. BUTTERWORTH Registered User
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    Yes
     
  8. Steven Thornberry

    Steven Thornberry User Administrator
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    Apparently Timesavers does not believe in the letter “Y”.
     
  9. doc_fields

    doc_fields Registered User

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    #9 doc_fields, Apr 6, 2019
    Last edited: Apr 6, 2019
    Hey everyone; I got a pm from David S., and he has graciously converted the chart to MS Excel .xls format, and also in .pdf format. I told him to go ahead and post it in this thread, we could all use it I'm sure in whatever formats we prefer. Thumbs up to you David!..........................gary
     
  10. David S

    David S Registered User
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    You did all the heavy lifting Gary. So here are some formats. Folks can use the Exel to edit and add to for their own records, AND we can always keep it as a living document if other additions are appropriate.

    Thanks Gary,

    David
     

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    disciple_dan and doc_fields like this.
  11. doc_fields

    doc_fields Registered User

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    Maybe this should become a sticky?:lightbulb:............................gary
     
  12. Steven Thornberry

    Steven Thornberry User Administrator
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    So, when were stainless steel pivots introduced? 1993, 2006, or 2019? And, howzabout the use of numerical date codes prior to 1988? There are some who do not recognize them for what they are.
     
  13. doc_fields

    doc_fields Registered User

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    See my posted thread here: Hermle Stainless Steel Arbors and Pivots

    I'm surprised you missed this, it wasn't very long ago (December 2, 2018) when it was posted.:):).........................gary
     
  14. MARK A. BUTTERWORTH

    MARK A. BUTTERWORTH Registered User
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    Movements before 1988 were identified by their two digit year code ABOVE THE NAME. E.g 81=1981
    The stainless steel arbors are on all movements manufactured in 2019 and after. Thus beginning with the date code AF
     
  15. Bruce Alexander

    Bruce Alexander Registered User
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    Does Hermle use any special brass or bronze alloy bushings around their Stainless Steel Arbor/Pivots? Do they have any special service recommendations or should these SS pivots just be routinely maintained?
     
  16. MARK A. BUTTERWORTH

    MARK A. BUTTERWORTH Registered User
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    Nothing has changed otherwise. Routine cleaning and oiling with 859 oil.
     
  17. Bruce Alexander

    Bruce Alexander Registered User
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    Thank you. Stainless can be some pretty hard stuff to work with. I imagine that the pivots will hold up well if the movement is properly maintained.
     
  18. David S

    David S Registered User
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    It seems to me that most often the pivot holes are the weak link. I am curious why Hermle decided to change the pivot material to stainless steel. Corrosion resistance for movements shipped all over the place and held in inventory for awhile?

    David
     
  19. David S

    David S Registered User
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    Gary's sheet updated with the above information REV2
     

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  20. bangster

    bangster Moderator
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    Good on doc and David! I'll look into getting a link to this thread in Hints & How-Tos
     
  21. Bruce Alexander

    Bruce Alexander Registered User
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    That begs the hard vs. soft question as far as bushings are concerned but have you ever tried to machine Stainless David? I recently tried to reduce the diameter of a SS Fender Washer and that stuff would not cut well even with a carbide tipped tool. It didn't grind easily either. I eventually used my bench grinder on it and gradually got it down to the desired size.
     
  22. Bruce Alexander

    Bruce Alexander Registered User
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    Mark, what might be very helpful on these references to us "clock fixers" would be an indication of when Hermle (and others) used plated pivots. Those are the movements we're most likely going to be looking at for major maintenance in the near future. The Stainless Pivots are going to be under warranty for a couple of years and probably won't cause the same types of problems anyway. Can we get that info added to the reference charts Mark, Gary, David? Thanks!
     
  23. David S

    David S Registered User
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    Bruce yes I have machined stainless steel. Unfortunately alot of my stainless is "mystery metal" that I have taken from discarded equipment and hence no idea what grade. There are so many grades and some are not machine friendly. I have machined some that have brittle chips like a bronze or cast aluminum, or real stringy, and like you, on one occasion I used the tool post grinder in the lathe to machine the feature.

    David
     
  24. David S

    David S Registered User
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    Yes re updating the chart. As info is obtained we can do that. And I like the idea of adding the plated pivot era.

    David
     
  25. MARK A. BUTTERWORTH

    MARK A. BUTTERWORTH Registered User
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    Yes, corrosion resistance the primary factor although it is believed they will be much longer lasting. Not only are the pivots made of stainless, but the entire arbor will be a single piece of stainless
     
  26. David S

    David S Registered User
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    And REV3 to add Mark's latest info and improve formatting. Can provide PDF when changes are done.

    David
     

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  27. Bruce Alexander

    Bruce Alexander Registered User
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    Well, it's touched on elsewhere in the Archives in much greater detail but I think it would be helpful to note in the reference doc/spreadsheet/pdf

     
  28. MARK A. BUTTERWORTH

    MARK A. BUTTERWORTH Registered User
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    For Hermle the played pivot era affecting the 2nd wheels mostly from mid 1970’s to 1992
     
  29. David S

    David S Registered User
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    Marks comments added as Note 2 , Rev4

    David
     

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  30. Bruce Alexander

    Bruce Alexander Registered User
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    I was reviewing your book Mark. They changed their steel alloy and eventually stripped the nickel plating from the pivots, while still leaving it on the arbors for corrosion resistance. They then went to the ball bearing steel "plugs" for second wheels in 92, right?
    I assume that they must be using some type of stainless alloy which is still machinable and which doesn't quickly dull their tooling.
    If newly manufactured replacements are available, something from the early 70's is probably toast any way one slices it.
    Since pivot alloy has been such a focus of innovation for Hermle, I think as much pivot detail as possible could be helpful.

    Edit: Thanks David.
     

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