Please view these information tabs to learn more about the 351-020 and other Hermle Clock Movement 350/351 units
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 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 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.
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
About Hermle Clock Movements
Hermle clock movements are among the finest movements made in the modern times. The German made Hermle units typically work night and day for 30 years without much complaint.
To go and get it restored like normally would with any clock after a long time, it is found that is cost is high. This is for good reason as it can be a large task to restore it. But as seen, since its a modern day unit (Post War German) it can be available new for a very good price.
Get a new movement instead of a fixed up old one, get it in 3 days instead of 6 months. Save hundreds of dollars doing it also.
All the Hermle clock movements Clockworks offers is the best grade. In other words there are a couple styles some units have that are not as good as others. There are various movements that have more than one grade.
Some units can have plastic for the hour hand tube and the next wheel down, instead the better brass. Meanwhile the number is the same for both grades. In other words there is the economy grade and there is the full grade, on some movement series.
What will be received
Each one of the these fine Hermle clock movements come already oiled, will come with the hand nut also. If it is a pendulum style clock, it will come with the suspension spring and the pendulum hanger (leader).
Upon ordering Hermle Clock Movements
When placing an online order a receipt will be emailed provided the correct email address is entered. If no receipt, please check the spam folder for the receipt from us.
On the receipt is the link to click for the instructions for the product. The Hermle clock movements ships from Huntington, MA 01050 USA and sometimes from other locations also. The movements go out the next business day unless there is something we have to do to it such as a regear.
Hermle Clock Movement Identification
Most important is the identification of the Hermle clock movement and it requires locating the numbers on the back plate of the movement itself.
This can be done by removing access panels, sticking a phone inside and taking a picture, or even a mirror. Use any possible means to get the number of the Hermle clock movement. This information is not in the manual that came with the clock or on the wood case.
On the back plate of the Hermle clock movement there are numbers such as 451-050 94 cm. These numbers indicate everything there is to know about that particular mechanical Hermle clock movement.
Identification is the first step
In order to purchase a new Hermle clock movement, the old number has to match up with the new one. In short, the new movement will be exactly the same.
It is not a knock off. Generally speaking, all of the existing clock components will fit the new movement. Proper identification of the Hermle clock movement is important when troubleshooting, ordering parts, or discussing compatible components.
Thus, when contacting us it is imperative to correctly reference the number on the backplate of the movement. If there is any confusion, send us a picture of the back plate, as close and as clear as possible, and we can help identify which Hermle clock movement is needed.
A new Hermle clock movement is best
To clarify, as previously discussed in several sections, a new Hermle clock movement is always best. A new unit is a fraction of the price of an overhaul.
The clock will be up and running much faster than waiting months for an overhaul to be completed. The new Hermle clock movement will last another 30 years. This is not possible with a restored unit.
Mechanical Clock Movement Wear
By the time 20 or 30 years go by, the oil has solidified and is creating wear on the brass plates of the movement. So, when this happens, the clock movement will not run correctly. This is when the movement will need a cleaning at least, or be replaced. Of course, a brand new movement is always the best option.
What wear and where
Look at the old clock movement, and see holes in the brass plates where there are small pivot arbors sticking into these holes. These pivots are what the gears of the clock ride upon and as the pivots spin in the solidified oil, this makes the holes oblong instead of round.
With the pivot holes oblong, the holes are pinching the pivots and creating resistance in the gear train. With the solidified oil and the pinched pivots, the clock will eventually stop working or chiming.
Invisible clock movement wear
This wear takes place in the holes that are in the brass plates and is hard to identify sometimes. These holes in the brass plates become oblong instead of round and this pinches the pivot arbor going into it. Between this, and the solid oil, the clock ceases to function.
To have this repaired is an expensive and long process. To have a mechanical movement serviced can cost two times as much or even three times the amount of the new one. However, once the movement starts having problems due to the oblong pivot holes, something will need to be done. The clock will never stay running otherwise.
New Clock Movement Benefits
New clock movement benefits far outweigh the benefits of a restoration. This section will explain why that is and what the best course of action is to get your clock working.
Servicing the movement
Clocks need to have fresh oil after 10 years or so. Then, after 20 or 30 years, a full break down of the movement is necessary. This is all well and good and can be done with the old movement.
The movement will run for another 5 or 15 years with no issues but then it will be time to do it again. So obviously this is a new clock movement benefit.
Every time the movement needs to have work done on it or needs bushings, it will last less and less time before it needs attention again. So another new clock movement benefit is that this would not happen.
The repair process is expensive because it takes time to separate the plates, remove all the gears, do the necessary work, and then put them all back together again.
This process may need to be redone if not perfect the first time. The turn around time to complete an overhaul on a clock movement could be anywhere from 1 to 3 months, and in some extreme cases, a year.
It is a slow moving venture that costs twice as much as a new movement would. If a new clock movement is not available, then this is the best, and only, way to handle a clock repair.
Replacing with a new clock movement
If the clock movement is still in production, it is far better to just get the new clock movement. Mass production makes the movement so affordable it will cost a fraction of the price of the repair work.
The new clock movement will be the same one but brand new and ready to run 30 years without much complaint. There is absolutely no way to repair an old clock movement so that it is better than new.
Even the best clockmaker using the best equipment cannot make the clock movement better than a new one.
A new clock movement is a factory fresh restart. The clock will be like it was originally when you first made the purchase from the store. The new clock movement will be made by the same people, with the same machines, and the clock movement is the same.
It is not a close replica or made somewhere else besides Germany. It is the same movement. Not a knock off or replica. So wouldn't it make sense to get the new clock movement instead of chasing the old?
The choice is clear and obvious. The new movement will cost a fraction of the price and the clock is up and running in no time.
Movements That Would Need a Repair or an Overhaul
If a new clock movement is not possible, then a repair is most likely the only option. However we will try to convert it to a new clock movement that is close and easy to adapt.
If it is not an easy one to adapt, or would take too much case work, then the best solution is to have us work on it. Another clock movement to consider having restored instead of replacing it is the tubular bell, which is a high end movement.
The price of a tubular bell new clock movement makes an overhaul more attractive. This is due to the high price on the new clock movements which is over $1600.
We can charge a much lower amount for the complete overhaul on these units. Ultimately the choice is yours. There is a good argument in both directions that makes sense on these expensive new clock movements.
Clockworks = The best repair service
We would love to do the clock movement overhaul here at Clockworks and we do the best job. There are two ways to fix clocks; the easy way and the hard way. We only repair clock movements the hard way with no short cuts.
Even with new clock movements, we inspect them and make sure all is well before shipping them out. It is even more important for us to do your repair than another company because we do not go to your house. There is no one being intrusive in your home and possibly damaging your clock case.
The clock movement itself is the only item that gets sent to us. No components need to be sent since we have everything else here such as weights, dials and pendulums. It is a great advantage to have Clockworks work on your clock movement for this fact alone.
A clock supply depot such as us does not need to wait for parts. We possess everything we could possibly need to complete a thorough, professional clock repair right here. If a new clock movement is not possible, then this repair is your best and only option.
The new movement
New clock movement benefits usually do indeed outweigh the repair option. The movement will already have lubrication with clock oil so there is no need to oil it.
The new clock movement can then be put in by someone with experience in 10 or 15 minutes. A person with no experience will take longer, but the point is that it isn't hard to do. This is definitely a new clock movement benefit.
There are some instances where a clock case was made in an annoying way that makes it more difficult, but for clock movements that were in a mass production this is not the situation. This relates more to a few individual clockmakers who's design of the case makes it more tricky to get the new clock movement in or out.
Summary of New Clock Movement Benefits
It will also be on its way to the customer instantly instead of months later. A new clock movement will last the longest of any other choice.
Hermle Clock Movement Aliases
Hermle produces clock movements but the use of aliases is quite prevalent. The movement could have a stamp with any name but really it will be made by Hermle.
Some companies bought so many movements that they were able to get their name on the movement instead of Hermle. The following is only a partial list of names that could be on the clock movement.
The best Aliases in Disguise
Their stamp and number was on the movement instead of the Hermle number. Since it is not a Hermle number, the number would need to have a conversion to the real number. Correspondingly, this is done with the Mason and Sullivan chart, or the Seth Thomas conversion Chart.
However the Seth Thomas chart is not very accurate, please see instructions on that page.
Best to replace the movement
It is best to replace the clock movement if either of these names are on the movement automatically. Of course, do not have to think and decide if a repair is better, the answer is a simple no. These companies went out of business a long ago and the life of the unit is over.
Ordinarily, the lifetime is 25 - 30 years before it needs an overhaul or replacement. In fact, if ST or Mason Sullivan is on the movement that would indicate the clock is about 40 years old or more.
The other Hermle Clock Movement Aliases are easy
All in all, Hermle Clock Movement Aliases on other clocks use only their name, and not their own internal numbering system on the Hermle movements. So basically if the clock is of post war German origin just look at the number and forget the name.
Additionally, the numbers will indicate what movement it is. If it is a Hermle movement there are 3 or 4 digits then a hyphen, and then 3 more digits. For example, 1161-853 or 340-020 or 351-060. If the numbers look like this it is made by Hermle.
Other Names Used
- S. Larose
- Mason & Sullivan
- Tally Industries
- Seth Thomas
- Howard Miller
Hermle Number Examples
Below are some typical examples of the Hermle clock movement numbering system. If the clock numbers are similar to this, it is made by Hermle.
- 451-050 94cm
- 451-030 66cm
- 341-020 45cm
- 1151-050 114cm
- 451-053 94cm
- 1161-853 114cm
- 141-070 45cm
- 351-050 55cm
- 1161-850 94cm
- 241-070 94cm
Hermle Clock Movement Directory Explanation
Above all, a Hermle Clock Movement Directory is to get to the correct page that contains the clock movement. This is an important first step when ordering a new clock movement.
Thus, Hermle mechanical movements have numbers on the back plate starting with the below few numbers.
So, if the clock says something like 1161-053 drop the second half and click the 1161 button below. Then this will go to the page where the 1161-053 is as well as the rest of the 1161 series.
Hermle Clock Movement Directory, Number starts with.....
If Not Listed
If the Hermle clock movement is not found on these pages we may still have it as a conversion or we may be able to create it out of what exists. However, we need to know the movement number. So please email the movement number.
Of course a picture of the back plate is also helpful. Moreover, if the movement numbers do not look like the Hermle movement numbers it may be made by someone else. Additionally, the mechanical movement identification page will assist with determining who made the clock. In any event, this is for post WW2 modern mechanical clock movements made in Germany only.
Hermle Clock Movement
The numbers on the back plate of the 350 or 351 Hermle Clock Movement is everything one needs to get a replacement. If the numbers match then the movement will match. So if is says 350 or 351 and the rest of your numbers, it will be the correct one.
UW6/56 Mechanical Clock Movement
The spring driven Urgos UW6/56 mechanical clock movement is no longer available. However with a couple modifications the equivalent quality Hermle unit will fit in no problem. These two companies were competitors back at one time. Now Urgos is out of business and ultimately purchased by Hermle. The spring driven, westminster units such as the UW6/56 is obsolete but the Hermle 351-020 25cm is still available. This is the closest to the movement UW6/56 in production.
The dial winding holes are not in the exact same spot where the clock is wound through the dial. So what is required is to cover up the old holes with something and to drill new holes where they are needed. Or of course get a new dial if it can be found and have it drilled out to fit the 351-020/25. Often these units are used with a square 7 1/2 metal dial in a bracket clock case. So much of the time we offer a dial disk for this reason. The dial disk is 5 3/8 inches wide, made of thin metal, is mounted via peel and stick to the center of the old dial. Three new holes will be drilled on the customers end to be able to wind the new clock movement.
Pendulum fitting up
The old pendulum will not fit up to the new movement. The way in which it hooks up on the leader is different, the length is about right. So it is required to either get a new pendulum or modify the old one to adapt to the new hook up. The new hook up needs the top to be a double hook over instead of a hole in the top. The issue with adapting the old pendulum to fit the new movement is the following. By the time the top is cut down to be able to put the double hook with the hole top out of the way, it is then to short. The length is crucial to the proper time keeping of the clock. We offer the pendulum in this product bundle, please select the 25cm option on the 351-020 list, and also a pendulum for a 25cm movement to order.
About the new one
In the end the clock will be back up and running with a brand new movement. In 30 more years it can be an easy swap for the new movement as the Hermle 351-020 has a much better availability and many more were made. The new movement will come oiled already and with general installation instructions. We are a family of clock makers going back 100 years, please ask if there is a question.
Ordering a Hermle Clock Movement
Replacing the movement is a fraction of the price of a repair. It is also the fastest way to get the clock up and running again.
Clock movement removal and installation
Removing and installing the clock movement requires the most basic tools. All of the Hermle clock movements are in stock and ship immediately. We are full time clock makers and retailers.
This means we can help from start to finish. If needing assistance in picking out the correct Hermle clock movement, installation or troubleshooting, we can help. Please do not hesitate to ask.
Matching the CM when ordering a Hermle Clock Movement
The options in the drop down menu ultimately indicate stock items that are available. However, if there is a CM number that is needed and is not listed, we can usually create it by changing some gears. If this is the situation please give us a call. There is an extra fee for regearing the movement. Usually this is an additional fee of $100.
Replacing a clock movement is less costly than an overhaul. The movement will last another 25 years before needing any work. Since it is still in production, and offered at a very reasonable price, it makes sense to replace the movement. The clock will be problem free right away, instead of months.
Plus it will inevitably last longer than an even the best overhaul. There is no way to restore better than a brand new movement. So please make the wise decision of replacing whenever possible.