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This is a genuine Omega automatic wheel for Caliber 9300 automatic chronograph movement, part number 7229300A32038, Swiss‑made. The automatic wheel is a core component of the automatic winding system, working with the reversing wheels to convert the bidirectional motion of the oscillating weight into unidirectional winding force, transmitting energy to the mainspring barrel for efficient and stable automatic winding. When the original automatic wheel becomes worn, loses teeth, or has damaged pivots, causing reduced winding efficiency, replacing it with this genuine part is the ideal solution to restore the movement‘s winding function.
Genuine Omega Part – Swiss factory‑original for Caliber 9300, not a copy.
Automatic Winding Core – Works with reversing wheels for efficient bidirectional winding.
Precision Machined – Accurate gear teeth and pivots for smooth power transfer and low wear.
Essential for Service – Check/replace when automatic winding efficiency drops or rotor spins without winding.
Compatible Movement – Designed for Omega Caliber 9300, 9301, 9303 (9300 series automatic chronograph).
| Parameter | Details |
|---|---|
| Part Name | Automatic Wheel |
| Part Number | Omega 7229300A32038 |
| Compatible Movements | Omega Caliber 9300, 9301, 9303 (9300 series automatic chronograph) |
| Function | Transfers rotor power to the mainspring barrel for automatic winding |
| Material | High‑quality hardened steel |
| Origin | Switzerland |
| Condition | Brand new, genuine |
Omega Caliber 9300 series automatic chronograph movements (found in Speedmaster 9300, Seamaster 300 chronograph, Planet Ocean chronograph, etc.).
Repair of reduced automatic winding efficiency or rotor spinning without winding action.
Replacement of worn, broken‑tooth, or damaged‑pivot automatic wheels during movement service.
1. Is this a genuine Omega automatic wheel?
Yes. It is a Swiss factory‑original part (7229300A32038) for 9300 series calibers, not a copy.
2. What are the symptoms of a damaged automatic wheel?
Symptoms: rotor spins normally but automatic winding is very poor (low power reserve); manual winding works but automatic does not; unusual noise or grinding during automatic winding.
3. What should I pay attention to during installation?
The automatic wheel sits in the automatic module, typically working with reversing wheels. Clean the train and inspect the reversers before installation. Use recommended lubrication (special grease). Professional installation is strongly recommended.
4. Does this automatic wheel fit all 9300 series variants (e.g., 9301, 9303)?
Yes. The automatic module is identical across the 9300 family; the automatic wheel is fully interchangeable.
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