Ingraham 2nd arbor pivot wear.

Discussion in 'Clock Repair' started by Willie X, Nov 11, 2019.

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  1. Willie X

    Willie X Registered User

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    #1 Willie X, Nov 11, 2019
    Last edited by a moderator: Nov 12, 2019
    Much has beem said about how American clocks seldom wear out at the 2nd arbor pivots. Well, this one did. Willie X 20191111_134850.jpg
     
  2. Willie X

    Willie X Registered User

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    #2 Willie X, Nov 11, 2019
    Last edited: Nov 11, 2019
    I couldn't edit out the duplicate photo and also couldn't change pinion to pivot in the title. :???:
    WIllie
     
  3. R. Croswell

    R. Croswell Registered User

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    Amazing that it actually still running up to that point. Talk about over powered American movements.

    RC
     
  4. Willie X

    Willie X Registered User

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    The customer said it ran well but only 3 days per wind. Willie X
     
  5. shutterbug

    shutterbug Moderator
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    It looks like it tore up the pivot as well as the hole.
     
  6. lpbp

    lpbp Registered User
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    I've seen this often in steel plate movements.
     
  7. R. Croswell

    R. Croswell Registered User

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    Willie, how does that pivot hole compare with the other pivot holes in this movement?

    RC
     
  8. Willie X

    Willie X Registered User

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    RC,

    Nothing more than slight wear anywhere else ... I am going to rebush the escape wheel pivot for good measure and reface the pallets which are moderately rounded over.

    The pivot in that bad hole isn't that rough and also not hourglassed. Go figure. :) Willie
     
  9. woodlawndon

    woodlawndon Registered User
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    Haven't seen one that bad yet.
     
  10. Willie X

    Willie X Registered User

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    This is when a KWM bushing set will not be of any help. A Bergeon #48 @ 3.5 mm would barely cover the hole.

    It's on the shelf, running like a champ.

    WIllie X
     
  11. bkerr

    bkerr Registered User
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    It certainly is nice to have both sets, ran into the same type of thing last night. I have even bushed a B bushing with a K bushing. Does not happen often but nice to have both when needed.
     
  12. Bruce Alexander

    Bruce Alexander Registered User
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    #12 Bruce Alexander, Nov 13, 2019
    Last edited: Nov 13, 2019
    Whoa!

    Looks like you might need to custom turn a bushing for that. I don't think a #3 KWM Reamer/Bushing would have a large enough OD. A #4 Reamer/Bushing might work...

    I too am surprised that the clock still ran. It probably has some unusual wear patterns on the meshing teeth/pinons, yes?

    Does the mainspring look original?

    Edit: Nevermind. I see you're going (or went) with Bergeon instead.
     
  13. R. Croswell

    R. Croswell Registered User

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    It looks frightful but keep in mind that the wear is in the direction of the load, more or less tangent to the circle of the gear so the change in the distance between the wheel and pinion is actually less than the displacement of the pivot hole. Must have been a rough pivot or some abrasive dirt in just that one pivot hole.

    RC
     
  14. Bruce Alexander

    Bruce Alexander Registered User
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    That would make sense RC, but Willie observed...

    Maybe there was a defect in the Brass? Will the Horological Mysteries never cease? :chuckling: Helps to keep things interesting...
     
  15. JimmyOz

    JimmyOz Registered User

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    If that was a re-pivot sometime in the past it may not have been centred therefore it was not meshing properly and the strong spring plus the pressure from the cog started it on its merry way and it just kept going?
     

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