Making a steel click spring

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  • #49627
    willofiam
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    There are many types and styles of click springs for our mechanical clocks. This particular one is for a Gustav Becker P-42 time and strike wall clock movement. Notice the previous repair on the left and the right one was pretty rough, though they both functioned, I found it enjoyable to remake both pieces to look as original as possible.

    #62986
    willofiam
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    I know I could have sourced a spring from a supplier but I found it a great learning experience to fabricate one myself, not only that but some styles you cannot find the style needed. Here is the original that is in rough shape. I used this one as a template




    #62987
    willofiam
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    A good way to hold my template to the steel

    Traced out, rough cut and ready for filing or grinding to size and shape.

    #62988
    willofiam
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    Using the watchmakers lathe the small cutoff disk was perfect for grinding out the slot for the tab, and some other areas. I just used a paper towel to cover the headstock

    #62989
    willofiam
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    Final filing, using the top of the vise as a straight edge works well.

    Finding where the screw hole goes I drilled those out. Mounted in the vise I used a very careful tapping with a hammer and large punch, the bend does not have to be a sharp angle but it does have to be in the right spot. What I mean is when it is sitting on the plate the spring will have a bit of clearance so it doesnt rub the plate.

    #62990
    willofiam
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    Before moving forward I checked the clearance of the spring and the tab and hole alignment.

    Using a round nose pliers I bent the shape to be similar to the original. I say similar because the original was tweaked a bit out of shape.

    A quick test of function before hardening.

    #62991
    willofiam
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    Wrapping in iron binding wire I wanted to make sure that when I heated it up it would not expand too far.

    After polishing, heat treating, a careful test to see if the spring was in the right spot (so I didnt break them), tempered and ready for the movement.

    #62992
    willofiam
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    A test before working on the movement.

    Looks alot nicer than before doesn’t it? The customer really like the fact that I did this for his clock.

    #62993
    namonllor1953
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    Sweeeet!!!
    I love good craftsmanship!

    Ren

    #62994
    jim1228
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    Great job on the click springs William, they look original. Also really like the step by step how to pics.

    Jim

    #62995
    willofiam
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    Thank you Ren and Jim. Have fun, William

    #62996
    bernie weishapl
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    Click springs look great William. I have had to do a few of those that were jury-rigged in movements.

    #62997
    brianw
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    Thanks William, keep up the good work. Brian.

    #62998
    willofiam
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    Thanks Bernie and Brian, your comments are encouraging. Have a great day, William

    #62999
    gerene
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    Nicely done, thanks for the explanation!

    Jan

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willofiamMaking a steel click spring