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Clock Need a mainspring

B. J. Taylor

NAWCC Member
Dec 7, 2019
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I have one of the dreaded German Time Bombs that has the problem of the mainspring is trying to tear along the edge, something I don't believe to be repairable, at least not with my expertise.
I have been unable to locate a mainspring for it. Yes I have looked at horolovar for help and could not identify one. If anyone knows the part number and where it can be found, or has an extra one laying around it would be greatly appreciated.

Thanks in advance.
 

etmb61

NAWCC Member
Oct 25, 2010
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While there are a lot of these clocks extant almost nobody repairs them, so there are probably no new spares laying around. You're looking for a very specific "constant force spring." Unlike a typical mainspring it resists being unwound. Constant force springs are popular for a lot of applications in industry. You may be able to find a suitable replacement from a spring supplier, but it might cost more than the clock is worth.

Eric
 

B. J. Taylor

NAWCC Member
Dec 7, 2019
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While I partially agree with you, I was thinking as many clock guys can't be bothered with repairing these that they may have pieces of one laying around and I might get lucky and find one since they can't all be bad and no good clock person throws out possibly good parts. This being a 1 inch wide spring I know it is unique and would be kept. If for nothing but to know you had one if needed.
 

B. J. Taylor

NAWCC Member
Dec 7, 2019
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Still looking, the one I have has a tear in it and I don't care to have it break on me.
 
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