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What is a Clock Pendulum Suspension Spring?

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Clock Pendulum Suspension Spring Information

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Clock Pendulum Suspension Spring



Naturally, suspension springs do not have to be exact in length. If the clock runs slow, simply raise the pendulum bob with the rating nut at the bottom. Likewise, if the clock is running fast then turn the rating nut to lower the pendulum bob.

Most common springs



By and large, suspension spring A is the most common style suspension spring. Of course, it is most likely the one by default. If the old suspension spring looks similar to this one then it is right. As a general rule of thumb, small mantle clocks take suspension A1, wall clocks and small grandmother units will take suspension A2. The A3 size is for grandfather clock units with a larger pendulum bob diameter. This size can also be seen on Grandmother clocks with larger bob diameters. The larger A3 is used with large bob diameters so the bob will not wobble front to back. If using a pendulum with a bob of 8 1/2 inch diameter or larger please order Suspension A3 for this reason.

Not as common



Urgos uses the single hook style as seen in picture suspension B. However suspension A was the very most common to use. Very old antique round movements mainly use Suspension C and Suspension D. These are mainly French clocks and US made units made prior to 1945.

The content of this website is copyright by Clockworks and written by James Stoudenmire in year 2020

Last Updated: 2 months ago in

Updated on: 05/08/2022

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