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This is a genuine ETA 2824-242 cannon pinion with driving wheel, an original Swiss-made component for the ETA 2824-2 automatic movement. As the official part number 33 in ETA’s technical documentation, this integrated assembly transmits power from the center wheel to the hour wheel while incorporating a friction clutch that allows the hands to be set independently of the running movement.
This precision component is essential for restoring proper timekeeping functionality when the original part exhibits wear or insufficient friction.
Genuine ETA Part – Swiss factory-original for Caliber 2824-2.
Integrated Cannon Pinion & Driving Wheel – Dual-function assembly simplifies movement construction.
Built-in Friction Clutch – Allows independent time setting while the movement runs, preventing gear damage.
Precise Torque Transfer – Ensures synchronized hour and minute hand motion for accurate timekeeping.
Essential for Service – Replace when hand-setting feels loose, sticky, or timekeeping is inconsistent due to clutch wear.
| Parameter | Details |
|---|---|
| Part Name | Cannon Pinion with Driving Wheel |
| Part Number | ETA 2824-242 |
| Compatible Movement | ETA 2824-2 automatic (and some variants) |
| Function | Transmits power from center wheel to hour wheel; provides friction clutch for time setting |
| Origin | Switzerland |
| Condition | Brand new, genuine |
ETA 2824-2 automatic movement (common in Tissot, Mido, Hamilton, Longines, etc.)
Repair of slipping or loose hands when setting time, inaccurate time after setting
Replacement when friction clutch wear causes abnormal hand-setting resistance during movement service
1. Is this a genuine ETA part?
Yes. It is a Swiss ETA factory-original part (2824-242), not a copy.
2. How do I know if the cannon pinion needs replacement?
Symptoms: the crown feels too loose (no resistance) or too tight when setting time; the minute and hour hands do not align after setting; the hands wobble after setting despite normal running.
3. What should I pay attention to during installation?
Clean the center wheel arbor and the inside of the cannon pinion. Press it vertically without tilting. Follow the ETA technical guide. Professional installation is recommended.
4. Does this part fit the Sellita SW200 movement?
The SW200 is similar but not identical. Dimensions may differ slightly. Use a dedicated SW200 part for best results. This genuine ETA part may not guarantee perfect fit.
5. Does it require lubrication?
Do not apply regular oil between the cannon pinion and center wheel – it would reduce friction. Only a tiny amount of special grease may be applied to the pivots. Strictly follow the technical guide.
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