Sometimes it is best to just get the 4 pack of double end keys we offer There are many sizes and combinations for the double end key and it may be tricky to get the right size. Without access to the front of the movement it is hard to measure exactly how wide the arbors are that the key is to go on. In order to get this measurement remove the clock movement or the dial. However, this is not easy because it requires a measurement of the post the double end key fits onto. This chart works for both the fast/slow regulator and also to wind the clock. Using the clock key size chart, get the right size that the clock requires. It is possible to regulate the clock another way with an adjustable bob instead of a fixed length bob. This is not easy to get and at the same time is the most lost part. An ideal double end key fits both the winding arbor to wind the clock and also fits the smaller time regulator aspect. This controls the timing of the clock and turning it to fast or advance makes time faster and the opposite for slow. The F/S represents fast or slow, and the A/R represents advance or retard. Some clocks have a small place that looks like a mini clock winding arbor at the 12. The following is a Double-End Clock-Key F-S Note that will be very handy. This is rarely the situation and usually the clock would have rust on it if the mainspring is so wound up it will not wind down. When the mainspring is stuck together to itself with rust and goo for so long it may stick that way. The only way a clock can be over wound is if its been wound up for so long that the mainspring stuck. Everyone winds it up and the clock does not work so the non working clock is always wound up. Of course any clock that is not working will be wound all the way up from trying to make it run. All the 31 day clocks with Asian movements and also US replicas made in India, all take size 7. This rule may not apply to Westminster (3 places to wind) or time only (one place to wind) clock movements. The number 7 keys fits the 8 day time / strike units pretty much every time and this is what USA made the most of. Keys for USA units 1900 - 1950Īmerican clocks made from around 1875 until after the second war almost always take the size 7 clock key. Some round ones will take a number 3 but if getting a 4 it will still fit and wind the clock either way. If the clock movement is round and made in Germany the key size is number 4. German made post WW2 movements that are square or rectangle will take a number 8 keys or crank. There will be a stamp with the country of origin on the back plate of the movement and this can help us get the key. The further back in time we go with clocks the more the key chart would need to be used instead. This is the fastest and most easiest way to get the clock key. The movement type includes if the clock is made in Germany or USA and when it was made. Between the key chart or by movement type information below, the chances are good of getting the perfect key. We have mechanical clock keys in all the sizes available. With the below information you can order a new key utilizing the clock key size chart. Once the clock key is no longer with the clock it always seems to end up missing. Mechanical clock keys is the clock part that is most frequently lost.
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