NOTES FROM THE BENCH

Clock Repair Archive - -     Cuckoo Clock chain fitting:

Determining the correct type of chain: If you have a cuckoo clock that does not have any chains or has chains that do not work correctly there is a way to determine what chain to use. First ,count the number of teeth on the sprocket PICTURE and measure the effective diameter of the sprocket. Keep in mind that most cuckoo clocks sprockets / chains use every other link , so the distance between sprocket teeth must match the distance between 3 centers of links. Use the formula to find the circumference of a circle; to find the distance around the sprocket exterior ; then divide that by the number of teeth to determine the required distance between every other link ie: the distance between sprocket tooth ends. The wire diameter must be such that the links will set in the saddle of the sprocket enclosure without climbing out as the sprocket turns as the clock is running or when the clock is being wound. The links should sit approximately 50% of the way down on the tooth. The final test, however, is whether or not the chain pulls through without any places that bind up. The chain must run though SMOOTHLY or the clock will not work. If the links climb up on the sprocket teeth when the chain is pulled though, then the chain is not the correct link per foot count or the wire diameter is wrong.


Back to Notes From The Bench index

Page by: Perpetual PC's
Copyright (c) 2002 David Tarsi. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with the Invariant Sections being no invariant sections, with the Front-Cover Texts being no Front-Cover Texts, and with the Back-Cover Texts being no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".


Valid HTML 4.01!


The content of this website and journal has been prepared to provide information on the authors experience. The information is not a complete source. Use at your own risk. Any advice given by the author also is covered by this statement. This website and journal is not endorsed by any manufacturers mentioned. This website and journal has no connection whatsoever to any of the manufacturers mentioned. Your use of this information and your use of any advice given by the author is your acceptance of responsibility for all consequenses resulting in such use. No legal liability attaches to the author, the website, or the isp for any inaccurate or misleading information contained on the website and journal at any time or for the consequences of any errors or omissions or for the use of said information. However if written notice is given to the webmaster of inaccuracies or omissions, the author will endeavor to establish the factual position and where necessary correct the content of the website and journal in an appropriate and timely manner.