Hermle clock 351 – 350 movement
Hermle clock 351 - 350 movement
Hermle clock 351 - 350 movement is a popular movement for the bracket style shelf mantle clock. Its basically the same clock movement as the 341 series except the plate size is 20mm bigger. Such as the 341-020 compared to the 351-020. Or the 340-020 compared to the 350-020 are the same unit, but the plate size. The 351 and 350 has larger outer plates overall. However they are not cross compatible because the winding arbors are not quite the same. So the dial on one will not fit a the other movement.
The movement
The 351 - 350 movement Hermle clock series has Westminster chime and with a 120mm square outer plate size. It comes in a pendulum version such as the 351-020 or the non pendulum balance wheel version like the 350-020. The balance kind just has a balance wheel more like a watch on the top of the movement that acts as the escapement.
This is beneficial in that it cant be out of beat and its fine to be off level. Also to move from here to there with no reset up of the clock. All of these Hermle clock 351 - 350 movements take a key size 8 to wind them up and the run time is 8 days in a single wind. These units are all spring driven with the exception being the 351-830 and 351-850. Those units are special as they have two springs and one weight for the center. Often the center weight will be split into two weights on a yoke.
The hammers
The hammer locations are variable on this series. The 5 hammer bottom strike 351-020 pendulum, or 350-020 balance units are the most used, the movement does not take much depth and so it can be put into a shallow clock case no problem. Same with the side strike 5 hammer units like the 351-030, it fits into a shallow depth well. Other hammer locations are the back 4 on one side and 4 on the other like the 351-050 unit. Then lastly as in the 351-060 unit it can have 5 hammers diagonally on the back instead.
The chime
This is a Westminster chime unit. What this means is it will play Westminster progressively as it runs through the quarter hours. On the top of the hour we get to celebrate with the entire song and then it will strike out whatever hour it is.
Placing an order
The movement come as the movement itself with its hand nut, comes with the suspension spring and leader if its the pendulum style Hermle clock 351 - 350 movement. The movement will come already oiled and ready to go. It will come with instructions by email, if stuck, just ask us to help if there are issues beyond the instructions. This family has been working on clocks for literally 100 years, if questions, just ask us! And it does not matter if the clock movement is out of warranty either, even years after it does not matter. The factory warranty on this unit is 3 years.
- Less cost than a cleaning in most cases
- Should last 25-30 years, a repair would not
- Easy to install, we can help if needed
- Ships same day as order
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I have installed the face and made adjustments for alignment. The clock seems to be running and chiming well. The chime happens though 5 minuets before the hour. (and 1/4, 1/2, 3/4). How do I adjust the chime to happen 5 minuets later?
Mechanical Clock Chime On Time
These are the directions to get a German mechanical clock to chime on time. This means having the clock hands point to the right spot when the clock chimes. When replacing a clock movement , or getting new clock hands , either one, you will notice it will chime 5 minutes before it is supposed to, or 10 min after, something like this. This page explains how to correct this situation. It is unbelievably fast and easy to do.
Working with the minute hand
After a new mechanical movement is installed, or if you are just installing a new set of hands , it maybe noticed the clock will not chime at the time it’s supposed to. To correct this, take the minute hand off of the clock. This is the longer of the two hands.
With this minute hand off of the clock, turn it upside down and look that it has a square hole where it attaches to the clock. This square hole is in a bushing that will rotate WITHIN the minute hand itself.
The correction
So, all to be done is just use needle nose pliers to turn this bushing ever so slightly. Put the hand back on the clock and see if it’s pointing to the correct place where it chimed. If it is, then it all set and it will point to the exact place it is supposed too. If it is still not right, take the hand off and try again. Once you get the minute hand to point where it just chimed you then set to the correct time.
The conclusion
It is really that easy, there is nothing to do with the clock itself, only the minute hand. In other words, to put it in a silly way, take the minute hand off of the clock and walk to the garage with it. Take it far, far away from the clock. When in your garage take needle nose pliers and turn the bushing within the hand itself. Then walk back to the clock and put it on.
See if it’s now pointing to the right spot.