Friction fit balance staff

Discussion in 'American Pocket Watches' started by Tim Fitzgerald, Apr 16, 2018.

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  1. Tim Fitzgerald

    Tim Fitzgerald Registered User
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    Can someone tell me, is there a way to tell if a pocketwatch has a friction fit staff or riveted one. before tearing down a watch?
    Thanks
     
  2. Dr. Jon

    Dr. Jon Registered User
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    To answer your question; yes, someone can tell you.

    There are several ways. The balance arms with friction staffs often have 45 degree gussets at both ends, not always the case but often so.

    The hub is often blue but it is hard to see with the balance in place. The hub is the part of the staff on which the roller rests.

    Lastly, if it an American watch the maker's parts book will usually tell you (some models had both types) but it will show both balance types so you often use it successfully.
     
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  3. Tim Fitzgerald

    Tim Fitzgerald Registered User
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    Thanks,, I have the parts books downloaded , I will check them out .:)
     
  4. ben_hutcherson

    ben_hutcherson Registered User
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    #4 ben_hutcherson, Apr 16, 2018
    Last edited: Apr 16, 2018
    Hamilton 992B, 950B, 992E, 950E

    Waltham 1894, 1899, and 1908 models. I think there was a late Waltham 16 size model(1912 maybe?) that used them also.

    That about sums it up :)
     
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  5. Dave Coatsworth

    Dave Coatsworth Super Moderator
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    A slight correction, Ben? The '92 is riveted. I think you might have meant the 1894?
     
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  6. ben_hutcherson

    ben_hutcherson Registered User
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    You're right, Dave.

    I don't know of any 18 size watches with a friction staff.
     
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  7. 179

    179 Registered User
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    Keystone Howard series 11 rr chronometer and some smaller ones I think.
     
  8. 4thdimension

    4thdimension Registered User

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    Some 12s Waltham too.-Cort
     
  9. MrRoundel

    MrRoundel Registered User
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    Some Waltham 3/0's have a friction staff as well, Part numbers 20207-8, if I remember correctly (OK, I just restaffed one the other day.) . Like their big brothers, one number is for a tapered hub, one is straight. Granted, these are not technically pocket watches.
     

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