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What do the different shaft masurements mean?
How do I know which clock movement I need?
What do the different shaft masurements mean?
Most shafts are measured in two measurements. The first measurement of the shaft is what fits through the clock dial from the back. The overall shaft length is measurement from the front of the movement to the end of the shaft. The shaft needs to be long enough to fit through the dial and hold the hands. If the clock has class or is in a case, care needs to be taken that the shaft is not so long that it hits the glass or causes the hands to hit. We can send you diagrams and examples if you have more questions.
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How do I know which clock movement I need?
When choosing a clock movement, there are several things to consider. The following will cover the basics of choosing a battery quartz movement.
Movement size: Measure your old movement and find one that matches those measurements closely.
Shaft Diameter: The shaft has to be able to fit through the clock dial from the back.
Shaft length: Movement shafts are measured in tow lengths. The shaft or threaded shaft length is the length need to fit through the dial so that there is enough clearance for mounting. The overall shaft length is the total length of the shaft. This is the measurement from the front of the movement to the end of the shaft. The shaft needs to be long enough to fit through the dial, but not too long to protrude to far. In cases where the clock has a glass front, if the shaft is too long it or the the hands may hit the glass.
Torque: If your clock runs hands over 6" a high torque movement is needed.
Ticking: Many clock movements running a sweep (second hand) will have a ticking sound. We also have movements with a quieter step sweep and silent continuous sweep motion. Continuous sweep means a sweep will run smoothly around the dial without the classic step motion of a sweep.
Please let us know if you need more assistance.
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