Model 2 Dial

September 14, 2024

The new Model 2 dial is a hand guilloched silver with 3 patterns, 18k gold angular chapter rings with pad printed markers, and 18k gold hour indices with superlume.

This was a particularly challenging project. The main dial has 4 zones for 3 different guilloche patterns. After the hand guilloche, the recess for the chapter rings were machined to a depth of 0.2 mm and a tolerance of 0.005 mm.

The chapter rings were machined, circular grained on a lathe, and then pad printed on our custom built pad printer. This also required making a new cliche for the pad printer. The chapter rings are angular (not flat), meaning that the inside diameter has a height of 0.25 mm whereas the outside diameter has a height of 0.4 mm. This improves the reflection in the light and creates a more dramatic 3D appearance to the dial.

The hour indices were machined with a 2 mm endmill, then the pockets were machined with a 0.05 mm and 0.01 mm endmill (see the photo with a mechanical pencil). The indices were polished and then superlume added to the pockets using an oilier. The indices measure 1.2 mm x 0.9 mm x 0.2 mm (L W H), the pocket for the superlume is 0.1 mm deep, and the feet are 0.3 mm.

Finally, everything was assembled and the result is striking.

Close-up of a luxury watch dial with gold accents and multiple subdials, held in a watchmaker's holder on a green background.
Close-up of a penny with four precision tools (airbrush, chisel, and two other fine-tipped instruments) pointed at Lincoln's head.
Close-up of a 2015 U.S. copper penny with tiny metal pieces placed on top.
A dark scene with a glowing clock face showing the time as approximately 12:09.

4th Axis Fixture

March 17, 2023

The Roysdon Model 2 is well underway, but there are some specialized fixtures that are needed. For example, while the top and bottom of the bracelet is machined on an Elara CNC mill, a 4th axis operation is required to drill the holes for the screws that connect each link. This 4th axis fixture is used for the following operations:

  • ball-mill and endmill finish-pass on the right and left side of each link

  • endmill finish-pass on the front and back of each link

  • drill the holes for the screws that connect each link (top video)

  • drill the holes for the spring bars in the clasp (middle video)

  • drill the holes in the clasp retainer (the part that keeps the clasp closed)

  • mill the holes for the clasp release buttons (bottom video)

This fixture took 2 months to design in Fusion 360, and 90 hours to machine on the NS CNC Elara 4-axis Mill.

In the videos, the bracelet parts are prototypes made in tool wax. The final bracelet is made of either 18k gold or 316L stainless steel.

Close-up of a CNC milling machine with a metal workpiece, coolant spray, and a blue flexible coolant hose.
A metal mold with multiple cavities and gold and black components on a wooden surface.