FAQ: Mechanical Clock Movements


This post will cover frequently asked questions and their answers about mechanical clock movements. If you question isn’t listed in the post below, leave us a comment and we’ll make sure to answer it. Let’s get started!

QUESTION: My clock chimes 5 minutes early/late on the quarter hour chimes. How do I fix this?

ANSWER: When the clock is chiming, remove the minute hand from the clock. On the back of the hand is a bushing. With a pair of pliers turn the bushing on the back of the hand so that when the hand is put back on, it’s pointing directly at the number 3, 6, 9 or 12. Make sure you don’t turn anything on the hand shaft while doing this.

QUESTION: The hand nut falls off and if I tighten it down, it stops the clock. What can I do?

ANSWER: Remove the hand nut and minute hand from the clock. Then check the hour hand to ensure it’s pushed far enough next to the dial that at least 1/8″ of the brass shaft it is on is coming through the top of the hour hand. Do not count the threaded part at the tip of the shaft as part of the 1/8″.

Once you have the hour hand in the correct position, you can put the minute hand and nut back on. If the hour hand is too tight to go on any further, remove the hour hand and file out a small amount of the hole on the hour hand. There may be excess paint in the hole making it too small to fit correctly. Be careful not to file too much out of the hour hand; it still needs to be a snug fit.

QUESTION: Why does the middle weight drop faster than the outer two?

ANSWER: There could be several reasons why this is happening. Let us ask you this: are the chimes ever turned off? If so, when the chimes are off, the two outside weights do not move down until the chimes are turned back on.

It could also be that there may be something wrong inside the clock movement. In that case, you will need to talk to a mechanical technician. Klockit’s mechanical technician can be reached at 1-800-556-6474.

QUESTION: What does each of the weights do?

ANSWER: The left weight (as you are standing in front of the clock) runs the hour strike. The center weight runs the time and pendulum. The right weight runs the 15 minute melodies. This is also true for wind up clock movements.

QUESTION: I have a mechanical clock movement reads ’94cm’ on the back, but I want to use a longer pendulum. Is this possible?

ANSWER: Unfortunately not. If you put a 114cm long pendulum on a clock that is meant to take a 94cm pendulum, it will run hours slow by a day and won’t keep accurate time. It’s the same as if you were to put a short pendulum on a movement that needs a long pendulum; it would run too fast.

QUESTION: Where does the heaviest weight go?

ANSWER: On the right-hand side as you face the front of the clock. This is true for all of the Hermle mechanical clock movements we carry. However, the Kieninger 13049 places the heaviest weight in the center because it features an automatic sequence option.