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Sizing a Cuckoo Clock Pendulum Hanger Wire

Wynot

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Dec 16, 2016
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I picked up an old cuckoo clock last week. It is missing the pendulum hanger wire. These are available in many lengths. The movement is a Regula-25. How do I know which length to buy? Thanks.
 

Willie X

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Feb 9, 2008
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Most will hang about 1/4" below the bottom of the house. Just enough so you can easily hang the pendulum. There are exceptions. Willie X
 
Last edited:

Wynot

Registered User
Dec 16, 2016
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Most will hang about 1/4" below the bottom of the house. Just enough so you can easily hang the pendulum. There are exceptions. Willie X
The measurement from the top hook to the bottom of the case is 3 inches. The options I've seen are 3 1/8" and 3 5/8". Looks like I'll be trying 3 5/8". That's more than the 1/4" you mentioned but, I don't see anything in the middle. Thanks!
 

shutterbug

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Oct 19, 2005
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These are fairly easy to make, so you could experiment to find the right length. Most repairmen have a few of them laying around. If you PM me your address, I'll send you one.
 

Willie X

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Feb 9, 2008
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Details: the leader's flattened wire top hook always hooks on right to left. The lower "D" shaped loop also needs to be adjusted so that the pendulum hangs exactly straight on the leader wire. This is best done before the leader is installed, just hold a little tension at the hook to leader junction and sight down the assembly. The leader/pendulum assembly should be as straight as an arrow, from top to bottom. If not, adjust the lower loop of the leader to make it so.
The pendulum should swing as an assembly, not as two separate parts. If the pendulum hook is teetering on the leader it won't run as well as it should.
Willie X
 

Wynot

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Dec 16, 2016
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Thanks to you both. As I progress here, I will certainly follow your advice. Until then, it's back to rebuilding the bellows.
 

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