TPD, or Turns Per Day, refers to how many rotations a watch winder performs within 24 hours. Correct TPD settings are essential for keeping a mechanical watch properly wound.
If TPD is too low, the watch may stop due to insufficient power reserve. If too high, unnecessary wear can occur over time. Different movements require different settings depending on winding efficiency and direction.
For example, many Rolex movements perform well around 650–900 TPD, while other calibers may require bidirectional rotation. Sunyung provides precise TPD programming options from 300-2500, allowing users or brands to match settings accurately.
Clear control panels, stable motors, and reliable logic ensure each rotation serves a purpose—not excess motion.