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This is a genuine Cartier rotor screw for Caliber 1847, a Swiss‑made original component designed to secure the oscillating weight (rotor) to the automatic module bridge. This screw ensures stable rotor rotation and is a critical fastener for the proper functioning of the automatic winding system. This original factory part is the ideal choice for watchmakers to replace worn, stripped, or lost original screws during service or repair.
Genuine Cartier Part – Swiss factory‑original for Caliber 1847 MC, not a copy.
Rotor Securing Core – Firmly locks the oscillating weight to the movement bridge for stable automatic winding.
Precision Machined – Accurate thread profile and heat‑treated for secure, vibration‑resistant fastening.
Essential for Service – Check/replace when the rotor feels loose, makes noise, or automatic winding efficiency drops.
Compatible Movement – Designed for Cartier Caliber 1847 MC automatic.
| Parameter | Details |
|---|---|
| Part Name | Rotor Screw |
| Compatible Movement | Cartier Caliber 1847 MC automatic (found in Santos, Ballon Bleu, Tank collections) |
| Type | Genuine original |
| Function | Secures the oscillating weight (rotor) to the automatic module bridge |
| Material | High‑quality hardened steel |
| Origin | Switzerland |
| Condition | Brand new, genuine |
Cartier Caliber 1847 MC automatic movement (found in Santos, Ballon Bleu, Tank collections with in‑house calibers).
Replacing lost, stripped, or damaged original rotor screws.
Repairing rotor looseness, unusual noise, or reduced automatic winding efficiency caused by a loose screw.
1. Is this a genuine Cartier rotor screw?
Yes. It is a Swiss factory‑original part for Caliber 1847 MC, not a copy.
2. What are the symptoms of a damaged or loose rotor screw?
Symptoms: the rotor feels loose (detectable by gentle shaking); unusual noise when the rotor spins; significantly reduced automatic winding efficiency; even scraping between the rotor and the movement bridge.
3. What should I pay attention to during installation?
Use a properly fitting precision screwdriver. Apply even, moderate torque (a torque‑controlled screwdriver is recommended). Professional watchmaker assistance is strongly advised.
4. Should I use threadlocker?
Usually not. The original Cartier screw has sufficient self‑locking properties. If it feels loose after multiple reuses, a tiny amount of low‑strength threadlocker (e.g., Loctite 222) may be applied.
5. Does this screw fit other Cartier calibers like 1904 MC?
No. Different calibers have different rotor screw dimensions and thread specifications – not interchangeable.
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