Mechanical Clock Weight Installation

May 7, 2019 8:07 pm Published by Leave your thoughts

Mechanical Clock Weight Installation

The weights may or may not all weigh the same, usually they do not. In fact the only movement that I know of that take the same weights across the board is the three weight chain driven Jauch floor movements that are now obsolete anyway. So with that said, we need to know what weights goes on what chain for most floor clocks in existence.

Most typically there is differences in the weights from left to right on a mechanical floor clock. In this section what clocks that are being referred to is the post WW2 modern floor clocks of German origin.

If you weigh the weights on the bathroom scale you will see you will either have two heavy and one light, or two light weights and one heavier. Why this is true is because the chime side will always take the heavy weight and the strike side will always take the light weight. The middle time train is left to be variable dependent on the pendulum bob diameter. The pendulum bob is the round disk at the bottom of the pendulum. If it is a wide bob or if the pendulum is heavy for other reasons, it will take more weight. If more weight is required on the center time train, it will be the same weight as the chime side instead of the strike side. Did that make sense?

Mechanical Clock Weight Installation - The heavy one

Ok it goes like this, the chime weight will always be heavy. This is the weight that goes on your right as you face the clock. So if you have a weight that is heavier than the rest, put it on the chime side. What is meant by chime side is the side that makes the songs go every 15 minutes. If the wrong weight is on this chime side, the clock will chime very slow and may stop in mid chime.

The Variable

The next one is the time train. This is the one that goes in the center of the three weights on the clock. If it is a heavy pendulum or the bob diameter is larger at 8 1/2 inches or 10 1/2 inches wide, its best with another heavy weight equal to the chime side. There are alot of clocks in the world running with the lighter weight when it should really be heavier and the clock runs fine for 30 years. So its not that big of a deal, but to be correct this is what it calls for. If the pendulum is heavy and the light weight is on there instead of the heavy one, the clock may or may not stop randomly.

The Light one

The lightest weight if there is one, goes on your left as you face the clock. This is the strike train side and this makes the clock bong out whatever hour it is. If the wrong weight is on this side, it may bong out the hours faster than what is intended. This will not be bad for the movement in anyway, its just what is comfortable to listen too.

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