Measuring quartz post lengths

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Measuring quartz post lengths

Above all, when replacing a quartz movement it means measuring quartz post lengths. Subsequently, the post will stick out through the front of the clock dial. Of course, there needs to be enough threads sticking out for the hex nut to be put on. Hence, the movement will be held in place to the back of the dial (clock face) and will not move. Sometimes if the clock has glass over the face it is possible for the post to hit it. Therefore it is important to measure the quartz post length correctly. In other words, if the post hits the glass, the hands will not be able to move. Thus making the clock not work.

Use the chart if building a clock

With that being said, find the correct quartz post length by using the chart below. So remember, the threads on the post need to be at least 2/16 longer than the thickness of the clock dial. To clarify, a clock dial is the face (also called the thing with the numbers on it). As always, email us if there is any question.

Measuring quartz post lengths if replacing a clock

If replacing a movement and not building a clock, it is easier to measure the quartz post length of the old movement. Before measuring, remove the movement first by taking off the hands and then the hex nut. Next, measure the length of the post that has the threads that the hex nut was on. In short, only measure the fat part of the hand shaft that we call a post. Also, never include the part that the hands go on when you measure the post length. All in all, the new unit needs to be the same post length as the old movement. Overall, this applies to all quartz clock movements available on Clockworks such as chiming quartz and time only quartz.

Dial Thickness

  • 1/16 inch thick
  • 3/16 inch thick
  • 5/16 inch thick
  • 9/16 inch thick
  • 3/4 inch thick

Size Post Needed

  • 3/16"
  • 5/16"
  • 7/16"
  • 11/16"
  • 15/16"
How to measure quartz clock movement post
The content of this website is copyright by Clockworks and written by James Stoudenmire in year 2020

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