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This is a genuine Swiss-made ETA sliding pinion (part no. 407) , a critical component in the keyless works of the ETA 2824, 2834, 2836 and their automatic movements. It is the primary torque transmitter between the winding stem and the clutch wheel. It engages the setting train for hand-adjustment and the winding train for mainspring charging. Replacing this part is the best solution to restore manual winding and time-setting functions.
Genuine ETA Part – Swiss-made, not a copy or generic component.
Compatible Movements – Fits ETA 2824, 2834, 2836 series and their automatic variants (e.g., 2824-2, 2836-2).
Keyless Works Core – Transmits torque between winding stem and clutch wheel; switches between winding and hand-setting modes. Prone to wear.
Brand New – Unused factory stock, perfect teeth and smooth sliding.
Restores Function – Replacing a worn sliding pinion fixes slipping stem, inability to wind or set time.
| Parameter | Details |
|---|---|
| Part Name | Sliding pinion |
| Part Number | ETA 407 |
| Compatible Movements | ETA 2824, 2834, 2836 series automatic |
| Material | Hardened steel |
| Function | Transmits stem torque to clutch wheel; switches winding/setting modes |
| Origin | Switzerland |
| Condition | Brand new, genuine |
1. Is this a genuine ETA sliding pinion?
Yes. It is clearly marked as a genuine Swiss ETA part, number 407, for 2824/2834/2836 calibers.
2. What are the symptoms of a worn sliding pinion?
Symptoms include: the crown spins freely without winding; pulling the crown does not engage hand-setting; time-setting does not move the hands; vague or sticky keyless feel.
3. Does this part fit other movements like the Sellita SW200?
The SW200 keyless works are largely identical to ETA 2824, so the sliding pinion is often interchangeable. However, dedicated SW200 parts are recommended for best fit. Not compatible with ETA 7750 or other non-2824 based calibers.
4. What should I pay attention to during installation?
Clean the keyless works before installing the sliding pinion onto the stem. After assembly, check smooth mode switching and proper gear engagement. Refer to the ETA technical guide and seek professional help.
5. Do I also need to replace the clutch wheel or setting lever?
Often replacing only the sliding pinion resolves wear issues. However, if the clutch wheel teeth or yoke are also visibly worn, replace them together for optimal keyless performance.
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