How to Replace the Suspension Spring on a Kundo 400 Day Clock
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- เผยแพร่เมื่อ 5 ต.ค. 2024
- Our website is: www.norkro.com
The introduction contains general information and history on 400 day clocks. It is followed by a demonstration on replacing the spring on a Kundo Anniversary clock with the "keeper" inside the upper portion of the pendulum.
You can view our 400 day clock parts here: norkro.com/col...
Awesome I’m looking at these clocks on eBay. Many are not working because of the torsion spring being broken. My grandma had one and was fascinated by it. Now I know I have a reference on repair or cleaning.
I have about a dozen of these, collected for the simple love of it... I tried to fix some of them, !!! But"" I .is to old to do it... Just love the history behind it... someone should be interested to take it over...
This is great. I bought a Kundo at a 2nd hand store. Now I know how to replace the torsion spring
Thanks for the video; you've confirmed that the pin on the bottom is a taper fit and now my spring has been replaced. Unfortunately, despite the old spring being severely kinked, it still won't run, but at least I've eliminated one thing.
Search TH-cam for a video on setting the beat on a 400 day clock. That’s the next thing to do after replacing the spring.
i don't think I will need to change my spring, but this is such a helpful video that I am sure that if I have to I will be able to do it with a bit more confidence. Thanks!
i got a Kundo (not sure of the model or year) at a thrift shop for $10.99. I am going to let it run overnight (hopefully) to see if the spring will power it. I have gotten my wife into mechanical clocks. I have always been intrigued by true mechanicals. I found a Korean striking wall clock several years ago. Its timing accuracy is annoying but it is fun to have anyway. It kinda adds life to this "empty nest" and I am sure will be part of our grandchildren's memories of the house.
I have one of those battery operated electromagnetic clocks. I had trouble getting it going, because I could not find parts. I am going to revisit it, because it is so pretty.
Thank you for taking the time to make this video. Appreciated !
Very helpful video as I am just about to do the same job. Without the book, unfortunately. The spring is in tacked until the bottom block, so hopefully I can work out the correct length.👍
Really good video. Information & pace is perfection. Thankyou.
he used the wrong fork for this clock on the suspension wire
I used a generic replacement fork. Considering the job that the fork does; its shape is not critical. The forks sold today (like the one I used) are about as universal as any clock part. I have never had a problem replacing a fork with one.
@@NorkroClockParts I got a lot out of this video 3 years ago. In the meantime I have collected ever more examples of these clocks with far too many of the Miniatures or Midget variety. I would like a tall version as I think the weights and the ratios involved better suit this torsion style of design. However the taller older clocks are much more expensive. I like your Gustav Becker with the disc pendulum. The ball clusters are pretty but often far too loose and flimsy.
My main problems have always centred on flutter. Its a weakness of these fascinating clocks and no matter what you do it waits in the shadows to jump out and bite you! I have been seeking an elegant cure. One that does not chop the original around and can be easily reversed. I am in fact testing one idea which shows promising results.
I agree with more frequent winding regime with the mainspring operating its mid-range which offers a more level output power.
Thanks again, Sincerely, BerryG (UK)
Interesting video, and many thanks for showing the correct procedure. I had to make a Corian jig to hold the bottom spring in the compressed position to drive the tapered pin out of the bottom clamp. Someone at some time had bent one of the bottom collars and made it very hard to even get at this pin. I have loved these clocks since I was a kid and now that I am retired I have the time to learn a new hobby. These are a blast to restore since most of the older 400 day clocks were very well made and can be found at very reasonable prices. I didn't know about the cut glass being only on the older clocks. Any idea of when they made the change to pressed glass with the smooth edge?
Fantastic simple clock
Great job
That electromagnetic/mechanical clock fascinates me. A kind of half-way house between the mechanical pendulum clocks and modern electronc quartz movements. I do love fixing pure mechanical clocks, though. Preferably weight-driven pendulum wall clocks and spring-driven anniversary clocks.
I still have that Pool electromagnetic clock and am interested in selling it. Condition is non-working.
Correction from a physicist:
It's not adjusting the centrifugal force, it's adjusting the moment of inertia which slows down or speeds up the lock.
Inertia in a way is the measure of how hard it is for something to change it's speed. Picture this, if I shot a 1 kilogram ball out of canon, you'd expect that there be come kick back. But if I shot a 10 kilogram ball out of the canon, you'd expect that there would be EVEN MORE kickback.
I love this explanation and thank you for it. Its the weirdest thing in some ways. I have always thought it was to do with the distance you are trying to move the weight but with no more available power. As in a larger circle has a longer circumference. Might be similar to the power to weight ratio in say a car.
BTW - whilst trying to be smart I noticed that you seem to have spelled "clock" as "lock" Am I right or am I right?
Thank s boss...appreciated your job 👍
I have a miniature Kundo from my parents dating back to the 1950s. It hasn't run in many years due to a broken suspension spring. I have all the parts still attached to the broken spring.
What's the best way to remove the pin from the bottom block in the pendulum?
I see I got a new 'like' on this comment. I'm happy to report the clock is fully working and keeping decent time! I was able to remove the pin by gently punching it out.
Sometimes if you do put a new spring with it's correct size. It sometimes go to fast or to slow even though you did everything right.
13:30...I can remember when you could buy those suspension spring assemblies ready made-!!!
Bottom block pin is stuck on my clock. I was hoping to see how you removed it.
Hola excelente explicación, dónde puedo conseguir el libro donde muestra diferentes medidas de suspensión. Saludos
Hi How can I find out the value of my anniversary clock? Where to look? Many thanks in advance
I suggest searching eBay for similar clocks that have sold or are selling.
Thank you for the well done video, ive learned a few things! I have a model 53 Schatz struggling to get more motion only 3/4 turn and overswing maybe 1/4 inch, it has a bracket to adj the fork deeper or more shallow, ive played with that a litte trying to set deeper to increase motion? and adjusted fork up but may be spread a littl far apart? any suggestions!
3/4 turn with 1/4” overswing might be all you can get out of it. If it keeps running I would leave it at that.
What is the purpose of the ones with the adjustable lever at the base under the pendulum?
I know this is a little off topic but I’ll ask the question because you briefly touched upon the beaded domes. I have four Kundo dome clocks. One is a 400-day clock with a glass dome that is cut at the edge and has a removable pendulum (so it was made circa 1950). The other three are quartz with a beaded glass dome. One is a quartz with a plastic dome, but it was advertised as vintage. Did Kundo ever make plastic domes or is it a cheap aftermarket replacement dome?
"Vintage" is a tricky description and designed to obfuscate reality. Quartz is modern and often plastic. They work better as a timekeeper but lack artistic merit and intrigue. Things that are too perfect ....... Yeah! I'm not sure when the plastic domes first arrived but they are much later. Glass is fragile & like fascinating art is easily spoiled. Originality is sought by some collectors who look for clues to spot deception. The cut glass domes are the way it was done. More lately the glass was cut by heat and this leaves a (safer) beaded edge. A true torsion regulated clock with brass & steel clockwork is much more likely to be of true vintage.
🙏❤️
I got a Benchmark anniversary clock that resembles the Kundo. It only has numbers on it, no model. How can a find the suspension spring needed for it?
How do I replace the wire on this one? Got it on e bay and pedelum is not swinging freely. It’s a kudo quartz made of wood. Can I send you a picture?
Great video. I have a 1960 Schatz anniversary clock. Its the same size as the small one you have. I have got the spring off and I am trying to work out the length I need. I have tried measuring the old spring, but it has a lot of twists in it. I have measured it and think I need a length of 7 centimetres. Does that sound about right ?
I'd suggest that you obtain a copy of "The Horolovar 400-Day Clock Repair Guide" by Charles Terwilliger.
This book has actual-size silhouette pictures of the suspension spring assemblies for these clocks.
@@daleburrell6273 is it really a good book ? i ant so badly to get it
@@brookebricks1053 YOU BETCHER LIFESAVERS- IT'S FULL OF IMPORTANT INFORMATION ON WIND-UP 400 DAY CLOCKS.
IT'S WELL WORTH THE MONEY.
@@daleburrell6273 Thank you so much. i will get it.
Some say made in Germany some say made in west Germany.
Is it safe to say made in Germany is pre WW2 or that distinction is not consistent.
Great video though
I have a schatz in the circle is the town in germany and 49r. Is this the referwnce to which identifies correct suspension spring or on left it says 8. 53
Hi i have a clock like this but without a key can somebody tell me what number a need and thanks very much for this video very helpfull
I have the same problem. I will look up the clock and find the key from there.
...your best bet is to measure the square winding arbor.
Hi, I just picked up a 400-day clock today and I noticed that the wire holding up the pendulum is quite twisted. Should it be straight and flat?
Yes, the spring should be straight and flat. If it has any amount of twist it needs to be replaced.
my supension spring broke but I cannot get the pin out of the pendulum it is like it is weld to it
You usually don't need to take the pin out. Just loosen the screws and the plates should separate enough for you to get the old spring out and the new one in
What's the name of that book please ?
I have just acquired a Kundo 400 day clock which needs a couple of things replaced. The back plate on mine, looks exactly like the one directly below the one you were pointing out in the book. if i'm correct, could you tell me what size kundo mine would be known as please?
Miniature Kundo clocks use a .0023" spring.
@@NorkroClockParts...that's a spring made by Horolovar.
I got my clock in Germany about 35 years ago and send it to my mom..it was about 3 years later she pass away and I got it back....it run by battery but the ball wasn't spinning when I got it back but it runs good to this day...what do I do since it run by battery
Battery powered clocks are TOTALLY different from wind-up clocks...and they are pretty much throw-away items.
@@daleburrell6273 Sad but true. Good timekeepers but they lack historical substance.
@@berryj.greene7090 ...that's another result of a "throwaway society".
What is the book you are using
My clock has a spring but clock still not working....also spring seem too long...I have a Kuno.... or Kono ...please help...I'd love to make it work...:)
If the name looks like Kono it's most likely a Koma. This clock can cause a lot of frustration for beginners. The miniature Koma clocks were not well designed and are hard to get running (even for professional clock repair persons). If the spring is too long the pendulum will bottom out and rub on the base of the clock.
@@NorkroClockParts ANOTHER consideration, is that if the suspension spring is the wrong length- the pendulum locking mechanism may not work!
Get yourself a copy of the '400 day clock repair guide' by Charles Terwilliger. I ended up buying my own copy because there was a waiting list for the book at the library.
I want replace the spring, but I do not know the size.
I might be able to identify it for you. Can you tell me who made it and the height and width of the back plate?
@@NorkroClockParts the clock is a WALT and the plate is :42x85 mm. I want send you a movie, please write me by email. I want say you that the clock, hava a spring of 0.07mm, but is very fast. Make 8 alternations in 50 seconds, and the swing is 270 degrees. Thanks
@@NorkroClockParts Sorry, I was wrong, an oscillation is done in about 50 seconds and the complete one is about 365 degrees and not 270. Please tell me how I can perform the setup. If possible, can you send me the drawing with the measures for the correct assembly of the suspension? Thanks again.
Get yourself a copy of the book by Charles Terwilliger!!!
It has all the information you need!!!
Very helpful Would anyone sell or rent me their guide
How do I remove the small pin in the pendulum preventing me from removing the spring?
You have to push or pull the pin through. I use a pair of parallel pliers: one jaw on one side of the pendulum top, the other jaw on the end of the pin. Squeeze the pliers and the pin will start moving through the hole. You can probably do the same thing with needle nose. Once you get it to move a little bit you should be able to grab it with the pliers and pull it the rest of the way out. They are in tight but you will be able to get it out.
找電風扇
Esa es una cochinada mejor no hagas nada ponlo de adrno. Cochino para trabajar