Posted November 13, 2017 by Will Heller
In this article, we will show you how to find the height measurement for a watch movement, so you know exactly what to look for if you need a replacement.
In order to get a proper measurement, you will need to have your old watch movement on hand and removed from the case. For a step-by-step guide, check out our how-to video on removing watch movements.
We strongly recommend that you remove the watch hands so the post can be accessed and measured properly. While it isn’t required, you may also first remove the dial, so it doesn’t get damaged during measurement.
Once you have your old movement ready, all you’ll need is a measuring gauge.
Measuring the Movement
Use your gauge to measure the height of the movement. This is the distance from the bottom of the movement to the top of the center post, not just the thickness of the movement itself.
Quick Tip: The Post is also referred to as the Hand Shaft, the Pinion or the Canon Pinion.
A digital micrometer is suggested as the results are accurate and easy to read.
Be careful to avoid protrusions such as screws, outer rings or batteries. This can unnecessarily add to the height and result in an inaccurate measurement.
Be extremely careful around the coil, as this can be easily damaged by even a light touch.
Round your measurement to the nearest one tenth of a millimeter. For example, because the height of this movement measured 4.43mm, we would round to 4.4mm.
One more thing to keep in mind is the date position. If your movement has a date ring, find the date number on the movement that is properly oriented. It should also align with the date window on the dial. Most watches have the date at the 3 o’clock position, but there are also 6 o’clock, 9 o’clock, 12 o’clock or even 5 o’clock positions.
Ordering a Movement
Once you have all of the information you need, head to Esslinger.com to find the right movement.
Watch movements come in various heights and increment sizes depending on the model, so not every height size is available.
Because of the precision mechanics and design of a watch, you need to find the exact measurement. Being off by even the slightest amount will usually not work.
To learn more about watch repair, check out other videos on our YouTube channel.