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This is a genuine Rolex 2235-204 winding pinion, a Swiss‑made original component for the Rolex Caliber 2235 automatic movement. As a critical part of the keyless works, the winding pinion works with the crown and clutch wheel to transmit rotational force from manual winding or time‑setting to the movement’s gear train, ensuring proper manual winding and time‑setting functions. This original factory part is the ideal choice for restoring manual winding and setting functions when servicing the 2235 caliber.
Genuine Rolex Part – Swiss factory‑original for Caliber 2235, not a copy.
Keyless Works Core – Sits between the crown stem and clutch wheel, switching between winding and time‑setting modes.
Precision Machined – Accurate gear teeth and sliding surfaces for smooth mode switching and reliable engagement.
Essential for Service – Replace when manual winding slips, crown spins freely, setting fails, or keyless positions are vague.
Compatible Movement – Designed for Rolex Caliber 2235 automatic (ladies‘ Datejust, etc.).
| Parameter | Details |
|---|---|
| Part Name | Winding Pinion |
| Part Number | Rolex 2235-204 |
| Compatible Movement | Rolex Caliber 2235 automatic (ladies‘ Datejust 28mm, etc.) |
| Function | Manual winding torque transmission, mode switching |
| Origin | Switzerland |
| Condition | Brand new, genuine |
Rolex Caliber 2235 automatic (e.g., ladies’ Datejust 28mm ref. 179160, 179171)
Repair of manual winding failure, crown spinning without effect, or slipping
Troubleshooting of non‑functional time setting or vague crown positions
Replacement of worn or damaged winding pinions during movement service
1. Is this a genuine Rolex winding pinion?
Yes. It is a Swiss factory‑original part (2235-204) for Caliber 2235, not a copy.
2. What are the symptoms of a damaged winding pinion?
Symptoms: the crown spins freely when winding (no resistance); cannot wind the mainspring; hands do not move or slip when setting time; vague or sticky keyless feel.
3. What should I pay attention to during installation?
The winding pinion sits on the stem. Clean the keyless works before assembly. Test smooth winding and setting mode switching after installation. Professional help is recommended.
4. Does this part fit other Rolex calibers like 2230?
Caliber 2230 (no‑date) shares a similar keyless works, so it is likely compatible. Verify with the parts diagram.
5. Does the clutch wheel need to be replaced at the same time?
Not always. If the clutch wheel teeth are also visibly worn (rounded), replace both. Inspect both components.
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