![]() However, if you have small children, keep the key on its caddy so as to be out of their reach. Mantel clocks that have key caddies are a hassle because the clock must be moved to open the back door to access the key. Keys should be kept either beside the clock, within the front access door of a wall clock, or on a caddy inside the case. Some clock keys will also have a number stamped on them indicating their size. 30-hour weight-driven Ogee clocks require a #4, #5 or #6 crank key. Insert the crank into the arbour and s.l.o.w.l.y wind the weights up to the top of the clock so that they are still fully visible. For those with weight cables, a winding crank is used to bring the weights up. Many tall-case (grandfather clocks) require a #10 or #11 winding crank and should not be wound with a key. Many American-made mantel clocks use a #5 or #6 key. In general, most larger German movements take a # 8 key but some take a #7.ģ1-day clocks, or a Korean/Chinese-made clock, usually takes a number 6 or 7 key. Speed adjustment arbour requires the small end of a two-ended key The small end is used to advance the minute hand and the large end fits onto the mainspring arbour. ![]() The key on the right is for a time-only carriage clock. Many clocks have a smaller arbour used for adjusting the speed of your clock and will have “S” and “F” (Slow/Fast) inscribed on the dial generally near the 12 o’clock position. The large end fits into the winding arbour while the small end is for adjusting the speed of your clock. The one on the left is used for winding a typical American clock. In the photo below you can see two types of double-ended keys. eBay, online for-sale sites and antique stores are other sources for clock keys. The two-pronged keys (4 and 5 prongs) are available at any clock supply house such as Perrin or Timesavers and will fit many clock winding arbours. ![]() In the photo below are keys from German and American movements. Using a micrometre to check pivot diameter this tool can be used to measure the thickness of a winding arbour 4 and 5 prong keys and singles Measure for a precise fit and order one online. However, this often means taking the movement out of its case. If you have other mechanical clocks in your house you can try those keys and one will usually work.Ī micrometre is useful to determine the thickness of the winding arbours (or shaft). #1950s swing clock mini grandfather how to#If you want to know how to wind a mechanical clock check out this articleĪ clock without a key means searching for the correct one. Clock keys often go missing in the life of a clock and the key you get when you buy a clock is likely a replacement and it usually fits well. With the exception of the smaller regulating arbour found on some clock faces all winding arbours or winding points on the clock face are the same size and one key will fit them all. A key that fits well should not be tight or difficult to insert but it should have a snug fit. Most mechanical clocks require that a key be inserted into a winding hole located on the dial face. A few run 14 days and anniversary clocks will run up to 400 days. ![]() Some must be wound once a day (30-hour clocks) but most are wound once per week (8-day clocks). Mechanical clocks require periodic winding. It also contains a chart to determine the correct size key for your clock. This article will help explain what the clock key is for and why the correct size for your clock is important. ![]()
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