Crutch Length

Deco10

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Mar 29, 2021
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Hello all! This question has likely been asked and answered for centuries, but I cannot seem to find a clear answer buried in the forum.

On American mantle clocks, and perhaps on many others, what is the correct length of the crutch wire? I struggle on this point with each strip escapement I replace where the original has been lost. The most helpful answer I have found was that the loop of the crutch should align with the lateral deflection of the pendulum spring, though I suspect in truth there is more trial and error involved.

What has experience shown you? I feel foolish when I hit this bump-in-the-road, as I'm sure there is a very elemental answer. I typically am working on Ingrahams and STs, though this is more of a general inquiry.

Any words of wisdom would be greatly appreciated and remembered forever.

Thank you!

Best wishes,

Nate
 

shutterbug

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I have done quite a bit of experimentation on crutch length, and have concluded that it doesn't make a bit of difference. As long as the pendulum moves freely within the crutch but is not too tight, any length will be fine.
 

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