SCREW DOWN CROWN INSTALLATION TUTORIAL

Tools & Steps to Cutting and Fitting your Stem to your Crown!

Tools:

1. Pin Vise or Tweezers
2. Flat end blunt nose pliers for cutting stem
3. File
4. Calipers
5. Loctite threadlocker
6. Thin sharpie for marking stem

Installation Steps:

1. Screw in uncut stem to the crown with pin vise or tweezers
2. Place movement inside case
3. Insert the stem and crown into the movement to test that the stem is properly inserting into the movement, and the positions for day/date change
4. With the stem and crown still in the movement and stem is fully down in to the movement, measure the distance between the end of the crown tube and base of the crown head with your calipers (this is the amount we need to remove from the stem – write this down).
5. Remove the crown and stem from the movement, and remove the stem from the crown.
6. Measure the total length of the stem with the caliper, zero it out, and subtract the amount from Step 4. Mark the stem where you need to cut it at based on the removal amount in Step 4.
7. Once you have the cut stem, you need to de-bur the end of the cut section so the threads will screw in smoothly to the crown head. Use the file to smooth it out.
8. Screw in the stem to the crown, and insert it into the movement to check the length (based on preference, the crown base should be slightly above the top of the crown tube).
9. Remove the stem/crown from the movement, and remove the stem from crown. Apply a small amount of Loctite threadlocker to the stem, and then screw it into the crown head. Tighten the stem into the crown with tweezers or pin vise. Let the Loctite settle for at least a few hours before using in your final build.
10. All set! Cheers and happy modding!

Looking to watch this process? Here is a good video resource for this Screw Down Crown Installation Tutorial method.