The following is a discussion on clock pendulum suspension-spring information. In summary, the clock pendulum components include the pendulum hanging on the leader and the leader hanging on the suspension spring. The top hook installation is by friction only. The first step to replace a lost leader is to visually match one to the old leader. The suspension spring is at the top of the movement. A shorter pendulum will make the clock run faster. If emailing pictures please include the back side of the clock movement where the markings are. Amazon.com: Clock Suspension Spring Certainly, narrowing it down requires a different method than just observation. The Urgos 32 series requires these components for the top section of the pendulum assembly where it interacts with the movement. Clock springs, also known as a power springs, are made by winding a pre-stressed flat strip of spring material on an arbor and into a retaining ring to create a compact power source. Moreover, some movements do not have an indication of the pendulum length on the back plate. No matter what situation it is we can surely find a solution. In this example, we see that it is a Urgos. Please email the movement numbers from the back plate, and explain what part you need. But. Sometimes all it takes is a leader that is a bit longer or shorter to correct an issue. Having said all that, 400-day clocks are terrible timekeepers and if you can get yours to within 5 (plus or minus) minutes per week you are doing well. At this point the suspension spring can be lifted into position as inserting the set screw. A thicker spring will speed up the clock, a thinner one will slow it down. It is very similar to the good one. You may or may not be able to correct this by raising the bob up or down. I need a pendulum spring for a Daneker Senator floor clock. Because there is so much room for adjustment, this measurement does not have to be exact. In the final analysis, visually inspect the pendulum hook style, the crutch on the back of the movement, and the suspension hook. If everything fails for one reason or another, the best chance for a pendulum is the wood stick style. ? Second, a leader is the part that the pendulum hangs onto when it is on the clock. Naturally, pendulum leaders vary depending on the manufacturer of the clock movement and they can also vary in length, as well as style. thanks, The 341-020 takes this suspension spring https://www.clockworks.com/product/mechanical-clock-suspension-spring. Single Strength Anniversary Clock Suspension Springs in a three pack. You may or may not be able to correct this by raising the bob up or down. Hi! After knowing the manufacturer, match the information to a leader shown on this page. Usually suspension spring A2 will fix the issue perfect. If the old suspension spring looks similar to this one then it is right. Whatever it is it is required in parts for that clock movement is no longer made or available. The suspension spring broke. It may say CM or PL and this stands for centimeter or pendulum length. From researching online I found it is the Mechanical Clock Pendulum Lead. If the movement is not in production anymore, then a movement restoration is the only option. Put the complete pendulum assembly on the clock and it is ready to go. Grandfather clocks by Kieninger take the 7 inch leader. It is more in depth than just matching up the broken pendulum part. Its a German grandmother wall clock. Its purpose is to suspend the leader and pendulum in the air. I have worked on similar models in the past and had left over Horolovar suspension springs of that size. If the clock runs slow, simply raise the pendulum bob with the rating nut at the bottom. Check the top of the pendulum leader and if there is a double hook on the end it will be style A required for the clock. Another way is to drill starter holes into the top hook and secure with screws or nails. If larger, use suspension A3. Here we calculate the theoretical length. What is the correct pendulum suspension spring for this clock? What size suspension spring do I need? 400 Day. First, a clock pendulum includes the bottom rating nut and threads, the pendulum bob, and top hook. It should run at 8 beats per minute. 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. All, or some, of these parts are what you need to order to replace lost pendulum parts. A picture is always helpful. The suspension is like a short grandfather clock suspension. 1/4" wide x 1-1/4" long x .0095" thick. Not all leaders have variable lengths and the ones that do are for Hermle and Kieninger clock movements only. If the leader is missing, however, there are some more steps to figure out what the leader length should be. The movement numbers indicate who the actually manufacturer is of the movement. Cutting the pendulum is the last resort. Well these old clocks are not that difficult to repair if you take your time and work carefully. I think I can manage the job now. The clock will slow down as the mainspring unwinds and therefore will run slower. Appreciate any help!!! )W 32/1A. I have several yards of spring and if you PM me I should be able to send you the few inches you need. You will need to cross reference The numbers on the back plate to the pendulum length that you need. ). The leader hooks to the suspension spring. This problem is solved by getting the customize and longer spring with the extended block installed. My second clock, first one was a Ingraham kitchen clock. This size can also be seen on Grandmother clocks with larger bob diameters. Thank you. Pics did not come out. Suspension spring are one of the easier parts to ascertain when replacing lost pendulum parts. The basis for this is on the smallest bob diameter. Suspension springs are the most common part you will need for a pendulum on a mechanical clock. Maybe you can ask and email pics instead clockworks@clockworks.com, James Stoudenmire 30yr Clockmaker Author of Clockworks.com. The bottom block has two pins to which the pendulum hangs. Hermle $8.95 For Hermle with wood stick This is the beginning step to identify a lost clock pendulum. Fine timing of the clock is easy as seen. Does pendulum length equal leader plus stick? The Mechanical Clock Pendulum Assembly - Clockworks Not a thicker spring but a thinner one. It is a Kundo anniversary clock made in the 1950s. So if you need leader G, a leader F can take its place with an alternate length. When I got the clock, the suspension rod was not attached to the suspension spring. There are also times where we have custom made leaders for customers. If the clock is timing slow, raise the pendulum bob by turning the nut at the bottom of the bob. This is based on a 4 1/2 inch bob diameter. Please email the movement numbers from the back plate, and explain what part you need. Second step, is to take this CM length and divide it by 2.54 to get the inch equivalent. This is the beginning step to identify a lost clock pendulum. This semi-automatic machine first straightens the wire from the coil it arrived in, re-setting the wire into a default straight line. The next section will describe the ones available. Can you help me find the correct suspension spring for my grandfather clock with an Urgos UW32/1A movement? I have several Anniversary clocks and made it a hobbie to restore them. Item #: 24634 UW32663-D The paper on back says 157 triple chime cable driven movement model no 610-199. Basically all I have is a pendulum. 1 3/4 inches is a good measurement to make one of these longer or shorter as needed, as this is the length of the threads at the bottom of the bob. The tube has two sections, the lower part (A) holds the suspension wire in position while the clock is in transit. Tall-Case Clock Suspension Spring for antique clocks. It involves a beat detecting device that counts out the beats per hour, or the beats per minute. In essence, the numbers will let us know or the stamp will clearly state the CM or PL number. Cut / bent / shape to fit the clocks needs https://www.clockworks.com/product/clock-pendulum-suspension-spring-rods. Ominous The Spirit is an artist that makes music, paints, and creates photography. Sometimes it takes a good guess on where the manufacturer meant to have the bob sit. Antique clock pendulums can use any one of these top hooks if it will do the job. There are two blocks, a bottom, and a top. May I use a weaker spring to adjust and is a weaker spring larger or small (.0030 or .0035)? It then in turn hooks to the suspension spring on the very top of the pendulum assembly. If the pendulum is too long, the clock will run slow. The A3 size is for grandfather clock units . Please help! French Suspensions Spring | NAWCC Forums Each time slowly cut an inch and half off of the sticks length and hang it back on. If the leader does not match up to any of the ones listed, please email us. Hope this helps. Next are the back spring cover and the locking guard. We do this by getting the numbers off of the back plate of the movement itself, right off of the brass. The measurement that is left is the length you need for leader F. There are 1 1/2 inches of thread at the bottom of the pendulum for fine adjustment. This is the first step in replacing a lost pendulum as well as replacing lost pendulum parts. There are cell phone apps out there these days that will tell the beat rate and the cell phone will listen and say if the clock will keep time with that pendulum. A Hermle floor or wall clock will always take leader D or G. leader E is for a low bridge to a high bridge conversion on a Hermle grandmother clock. It is not a manual one opens up regularly but when working on 400-day or anniversary clocks, as they are often called, it is an absolute necessity. The price would be about the same for a complete overhaul or a brand new one. Mechanical Clock Pendulum Suspension - Clock Parts - Clockworks Then keep adjusting the pendulum length until it keeps time. Seth Thomas #89 movt. If it is German, keep in mind the CM length is not the actual pendulum length. 9/72 RK 93cm , It appears the taper pin holes are precisely 3/4 apart. thanks Tom, Hi there I am looking for suspension spring for my hermle movement 261 080 B.It is version with long bridge I have part of it and the with is 5mm .I can not find the other part and i do not know how long it was can you help me please, Please order suspension spring A2 https://www.clockworks.com/product/mechanical-clock-suspension-spring. They click like a "cricket" (kids toy or WWII signalling device) when bent toward the convex side - the curve makes them act MUCH thicker than the steel actually is, and makes it bend MUCH more easily toward the concave side to allow them to be easily wound up on the reel. Please feel free to send an email with any questions. Then keep adjusting the pendulum length until it keeps time. Trademarks and brands are the property of their respective owners. 1 3/4 inches is a good measurement to make one of these longer or shorter as needed, as this is the length of the threads at the bottom of the bob. A1 = Mantle Clock 5/8 x 5/16, A2 = Wall / Floor Clock 13/16 x 5/16, A3 = Large Floor Clock 1in x 7/16, A4 = Large Floor Clock 1 1/4 x 11/16, One Each of A1 A2 A3, B1 = Urgos GrandFather 1 3/4 Long, B2 = Urgos GrandMother 1 1/8 Long, C1 = French 15/16 x 3/16, C2 = French 1 1/8 x 3/16, C3 = French 1 1/4 x 7/32, D1 = Antique 1 3/16 x 3/16, D2 = Antique 1 7/16 x 3/16, A1 = Mantle Clock 5/8 x 5/16, A2 = Wall / Floor Clock 13/16 x 5/16, A3 = Large Floor Clock 1in x 7/16, A4 = Large Floor Clock 1 1/4 x 11/16, B1 = Urgos GrandFather 1 3/4 Long, B2 = Urgos GrandMother 1 1/8 Long, C1 = French 15/16 x 3/16, C2 = French 1 1/8 x 3/16, C3 = French 1 1/4 x 7/32, 29mm x 5mm x 1 mm, 32mm x 5mm x 1mm, 37mm x 5mm x 1mm. Therefore, the elimination of this from the list of choices is viable if a conversion is not being done. COP872.14B . Use the above information to correctly identify the movement so it is possible to replace the pendulum part. Changing Suspension Springs Putting the Clock in beat Cleaning and Oiling Operating Instructions Setting up the Clock: First rule is to always move the clock with the pendulum balls either in the locked position or take them off completely. By far letter A is the most common sold and has size options. So its the suspension on the top, the leader hangs on it, then the pendulum hangs on the leader with the pendulum top hook. The movement numbers indicate who the actually manufacturer is of the movement. Moreover, some movements do not have an indication of the pendulum length on the back plate. Im not certain as to size since all that is left is the top and bottom portions. I have a Junghans Mantel Clock with a B20 movement. Copyright 2022 National Association of Watch and Clock Collectors Inc (A 501c3 non-profit corporation). There is no such thing as having a repair on a clock movement being better than a new movement. Suspension springs are the most common part to purchase for a pendulum on a mechanical clock. I need a pendulum suspension spring for a Seth Thomas regulator wall clock A206-014 8306 unadjusted. Suspension A4 is only for huge clocks with tubes hanging off the back of it (tubular bell units) with a very heavy pendulum. To clarify, CM stands for centimeter and PL stands for pendulum length. Making sure the spring is not bent during the process, unscrew the blocks (those little screws can be stubborn to move) then insert the suspension spring and tighten the screws. We will be glad to help. Please use this as a glossary for parts in a clock pendulum assembly. Just wanted to double check before ordering. Hello there! I purchased a clock with no leader nor pendulum. A spare spring is always a good idea to have on hand. For information on how to install a suspension spring click.
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