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This is a genuine Hublot reversing wheel designed for Caliber 1242. As a critical component of the automatic winding system, the reversing wheel converts the bidirectional motion of the oscillating weight into unidirectional winding force, efficiently powering the mainspring. This original factory part is essential for servicing and restoring the automatic winding function of the Hublot Caliber 1242 automatic chronograph movement.
Genuine Hublot Part – Swiss factory-original, perfect fit for Caliber 1242.
Automatic Winding Core – Works with a second reversing wheel for efficient bidirectional winding.
Precision Machined – Accurate gear teeth and sliding surfaces for smooth power transfer and low wear.
Essential for Service – Replace when automatic winding efficiency drops, rotor spins freely, or unusual noises occur.
Compatible Movement – Designed for Hublot Caliber 1242 automatic chronograph (e.g., Big Bang Unico).
| Parameter | Details |
|---|---|
| Part Name | Reversing Wheel |
| Compatible Movement | Hublot Caliber 1242 automatic chronograph |
| Type | Genuine original |
| Function | Converts bidirectional rotor motion into unidirectional winding force |
| Origin | Switzerland |
| Condition | Brand new, genuine |
Hublot Caliber 1242 automatic chronograph (e.g., Big Bang Unico 42mm)
Repair of reduced automatic winding efficiency or rotor spinning without winding
Replacement of worn, broken, or damaged reversing wheels during movement service
Troubleshooting unusual noises or grinding in the automatic winding system
1. Is this a genuine Hublot reversing wheel?
Yes. It is a Swiss factory-original part for Caliber 1242, not a copy.
2. What are the symptoms of a damaged reversing 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?
Reversing wheels work in pairs. Clean the train and inspect the other reverser. Use recommended lubrication (special grease). Professional installation is strongly recommended.
4. Does this part fit other Hublot calibers like 1280?
Different calibers may have different automatic module designs. Verify with the parts diagram.
5. Should I replace both reversing wheels at the same time?
It is recommended to replace them as a pair. If one is worn, the other is likely near the end of its life. Replacing both ensures long-term reliability.
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