I still can’t believe that one of the most common repairs I perform on watches is to replace a broken crown. The crown is the little round winder on the side of the watch, typically it is on the right side of the watch, however, sometimes the crown is located in different locations.
Here is a video of the process of replacing the sleeve and crown…
Here are the tools you’ll need to perform this procedure…
- Micrometer or millimeter gauge
- Drill bits that measure the outer diameter of the new sleeve
- Flex-shaft machine
- Parts Tray(s)
- Ultrasonic Cleaner and Solutions
- Watch Rinse Solutions
- Rawhide or Rubber hammer
- Watch Holder
Parts you’ll need
- New Crown
- New Sleeve
- New Stem (Maybe if the original was broken and is now too short
How to Measure the Sleeve and Crown – Standard Crown
There are several things you need to know about measuring the sleeve and crown. here is a list that should make it easy. Remember that all measurements are to be taken in millimeters.
- Outer Diameter of the crown
- Outer Diameter of the sleeve
With these three measurements, you’ll be able to replace almost all crowns or sleeves
How to Measure the Sleeve and Crown – Screw Down Crown
As with the standard crown and sleeve, with a screw down crown, you’ll need one extra measurement… You will have to know the tap size of the crown.
In some cases, if you’re not replacing the sleeve, then the outer diameter of the crown, and the tap size of the sleeve, whether it is an outside thread or inside thread is enough.
Match it, and then you can order and install it.
How to find the Right Stem
The one thing about stems you should know, is that are manufactured for specific watches. Stems can be tough to find, however, you can always contact the manufacturer and order one for a specific model. However, you must take note that after a certain period of time, even the manufacturer will stop supporting most of their models. This can make it a bit more difficult.
This is usually much more difficult if you are trying to restore vintage or antique watches, because these parts are almost never available, and you’ll almost always need to find New old stock, or used parts to do your repair.
Many of the step repairs I perform also involve the replacement of the crown. Keep this in mind, and follow the procedures to measure the correct crown from above.
If you are replacing the step, then you’ll also have to shorten it. this means that you’ll have to take the time to fit the step in the watch, make sure it is long enough, and if too long, shorten it a bit until you reach the correct length. Take too much off, and you’ll have to order a new stem, so be careful when doing this.
Thats it… If you have any questions, then please feel free to ask.
Good luck and happy watch Repair!