Aqara U200 Adapter for Swiss Cylinders

⚠ Note

I don't know how standardized these Swiss cylinders are. If yours doesn't have screws in the same places as mine, this model might not work for you and may need to be adapted.

What You Will Need

• A print of the door plate model
• 4 x M3 nuts, with a height of less than 2.5mm
• 4 x M3 screws (6mm length is ideal; I used 8mm screws)
• N prints of the 2mm spacer model, where N = (screw length - 6mm) / 2

The spacers prevent screws from extending through the printed door plate and into the cylinder. For example, with 10mm screws, you’ll need 4mm of spacing, so two spacers. Alternatively, you can scale the spacer model to add more thickness if needed.

Installation

Refer to the official installation instructions in addition to the following as you install the lock.

1. Insert the M3 nuts into the designated slots on the printed door plate.
2. Attach the door plate to the cylinder by:
   • Removing the screws from the cylinder.
   • Positioning the printed door plate on top, with the nut slots facing the door.
   • Adding the cylinder screws back, securing the door plate to the cylinder.
3. Place the metal lock plate over the door plate. If you need spacers, add them on top of the lock plate. This keeps the spacers inside the lock, creating a lower profile for the lock.
4. Use the M3 screws to secure the lock plate and spacers to the door plate.
5. Complete the rest of the lock installation as outlined in the official instructions.

Printing Specifications

I used PLA on a Bambu Lab P1S, with default Bambu Studio parameters: a layer height of 0.2mm and 15% infill.