Day-Date 40 TPD & Winder Settings | Swiss Watch Store

The Rolex Day-Date 40 is an automatic watch: it winds itself from the motion of your wrist, but on the days it sits unworn a watch winder keeps the mainspring topped up. This model carries reference 228235. It is powered by the Calibre 3255 movement. Below you'll find the exact TPD setting and winding direction the Day-Date 40 needs.

TPD and Winding Direction

The correct setting for the Day-Date 40 is 800 turns per day, bidirectional: 800 turns per day with the rotor turning in both directions.

Turns per day (TPD)	800
Rotation direction	Bidirectional
Movement	Calibre 3255

Why the Correct Setting Matters

Too few turns and the Day-Date 40 stops between wears; the right figure keeps the mainspring in its sweet spot, where the movement runs most consistently. And there is no risk in experimenting: a modern automatic cannot be overwound on a winder, because the mainspring's slipping bridle releases excess tension. Getting the setting right is about convenience and accuracy, never about avoiding damage.

Choosing a Watch Winder for the Day-Date 40

For the Day-Date 40, look for a programmable winder offering a 800 TPD bidirectional programme. One watch? A single winder. Two or more automatics? A double or triple winder keeps the whole rotation ready. You'll find suitable models in our watch winder collection — check the programme list before you buy.

Day-Date 40 Winder FAQs

What's the correct TPD setting for the Day-Date 40?

The Day-Date 40 is specified at 800 turns per day. Most programmable winders offer this as a standard preset.

Which winding direction should I use?

Bidirectional — the winder should rotate in both clockwise and anticlockwise directions.

Can I use any watch winder for my Day-Date 40?

Yes — provided it's programmable. Verify the winder offers 800 turns per day with bidirectional rotation before buying; fixed-setting winders may not match.