Why one pivot on the entire movement

Discussion in 'Clock Repair' started by Rockin Ronnie, May 13, 2018.

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  1. Rockin Ronnie

    Rockin Ronnie Registered User
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    Nov 18, 2012
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    Every pivot on this Gilbert time and strike (1906) movement is in very good condition except for this, the second wheel on the strike side, front pivot.

    Why?

    I have never replaced a pivot but I am thinking that this will be one that should be replaced.

    Ron

    RS Gilbert movement (16).jpg RS Gilbert movement.jpg
     
  2. shimmystep

    shimmystep Registered User

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    probably down to a combination of reasons, i.e. it being the second wheel and so being under more axial load, and probably a contaminated pivot hole, detritus embedded. I'd def re-bush the hole.
     
  3. wow

    wow Registered User
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    Yes, like Shimmy said, just turn down the pivot and polish it. It looks like from the photo that there is enough steel left to use it after it is turned down. Then install a new bushing to fit the new pivot size. Easier than re-pivoting
     
  4. Uhralt

    Uhralt Registered User
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    Yes, definitely. there must be something very abrasive in that pivot hole. A new bushing will change that.

    Uhralt
     
  5. Rockin Ronnie

    Rockin Ronnie Registered User
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    Never thought of turning down the pivot and yes, I think there's enough left. thanks.

    Ron
     
  6. Rockin Ronnie

    Rockin Ronnie Registered User
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    Did the repair and installed the new bushing. Looks like I saved a lot of work, thanks Shimmy.

    Ron
     
  7. shimmystep

    shimmystep Registered User

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    Glad you have it sorted, nasty bit of wear that.
     
  8. MARK A. BUTTERWORTH

    MARK A. BUTTERWORTH Registered User
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    It is possible that pivot was never polished properly in the first place.
     
  9. claussclocks

    claussclocks Registered User
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    #9 claussclocks, May 15, 2018
    Last edited: May 15, 2018
    I just did one like that this morning on a Sessions. If you laid them side by side you would think they were the same thing. I just turned it down with an Arkansas stone, polished, and re-bushed the hole. Works just fine. Those American movements can spare quite a bit of pivot material and still be good.

    You might consider checking your mainspring. If you don't mind the investment going from a .018 to a .0165 spring might help. Those old springs really over powered some of those systems. Don't get an Indian made spring if you can help it. Not very consistent in manufacture.

    I got a clock in one time from a lady who had moved from Tucson. Almost every hole and every pivot were near a third to a half gone. All that sand had just ground out holes and it was like putting the pivots on a grinding wheel
     
  10. Rockin Ronnie

    Rockin Ronnie Registered User
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    I was thinking the same thing. Like you I ground it down on my lathe and polished it. The movement doesn't have a case. I picked it up at a flea market for $10 to basically practice on. It had been worked on before, new bushings, solder etc. and I suspect the mainwheel had a replacement (perhaps overpowered) mainspring owing to the unusual wear on the second wheel. As I mentioned every other pivot was in great shape.
     

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