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This genuine Rolex center jewel (jewel bearing) is an original Swiss-made component specifically designed for Caliber 2230 and 2235 automatic movements. Serving as a low-friction bearing for the center wheel, it is a critical element in the gear train that ensures smooth power transmission from the barrel to the escapement. As an authentic Rolex factory part, it is the ideal replacement when the original center jewel becomes cracked, chipped, or worn, restoring the movement’s reliable timekeeping and preventing further damage to the center wheel pivot.
Genuine Rolex Part – Swiss factory‑original, not a copy or generic substitute; guarantees perfect fit and Rolex‑level durability.
Center Wheel Bearing Core – Supports the center wheel pivot and ensures smooth rotation with minimal friction, directly affecting power transmission efficiency.
High Hardness & Wear Resistance – Made of synthetic ruby (corundum), second only to diamond in hardness, providing exceptional wear resistance for long-term stability.
Essential for Service – Replace when the center jewel is cracked, chipped, worn, or dislodged to prevent pivot damage and restore gear train reliability.
Compatible Movements – Designed for Rolex Caliber 2230 (no‑date) and Caliber 2235 (date) automatic movements, commonly found in Oyster Perpetual and ladies‘ Datejust series.
| Parameter | Details |
|---|---|
| Part Name | Center Jewel / Jewel Bearing for Center Wheel |
| Part Numbers (Reference) | Often listed in Rolex parts catalogs under numbers such as 2000, 2001, 2002; confirm via official documentation |
| Jewel Material | Synthetic ruby (corundum) |
| Hole Shape | Round with oil retention feature (oil sink) |
| Mounting | Press‑fit into the mainplate or bridge |
| Compatible Movements | Rolex Caliber 2230, 2235 (and possibly other 2230‑platform calibers) |
| Movement Base | ETA‑based architecture; 31 jewels total |
| Beat Rate | 28,800 vph (4 Hz) |
| Power Reserve | Approx. 42 hours |
| Origin | Switzerland |
| Condition | Brand new, genuine |
Rolex Caliber 2230 (no‑date) automatic movements found in Oyster Perpetual 31mm (e.g., 77080, 76080) and various midsize/ladies‘ references.
Rolex Caliber 2235 (date) automatic movements found in ladies’ Datejust 31mm and 28mm models (e.g., 178240, 178271).
Suitable for professional repair or restoration of 2230/2235 calibers requiring center jewel replacement due to damage or wear.
Also applicable to other 2230‑platform calibers that share the same movement architecture.
1. Is this a genuine Rolex center jewel?
Yes. It is an authentic Swiss factory‑original part for Caliber 2230/2235, not a generic or third‑party substitute.
2. What are the symptoms of a damaged center jewel?
A damaged or worn center jewel can cause the center wheel pivot to run off‑center, leading to erratic power transmission, sluggish hand movement, loss of amplitude, and increased timekeeping errors. In severe cases, the damaged jewel may score the pivot, requiring replacement of both components.
3. How do I know if the center jewel needs replacement?
During movement service, inspect the jewel under magnification. Replace if you observe cracks, chips, an ovalized worn hole (indicated by an off‑center pivot), or if the pivot shows excessive radial play. Also replace if the jewel has been dislodged from its setting.
4. What should I pay attention to during installation?
Center jewel replacement requires specialized tools (jewel press) and expertise. The jewel must be pressed straight into the mainplate or bridge without tilting, and its seating depth must be precise to ensure proper endshake. After installation, inspect the pivot fit and apply a very small amount of appropriate lubricant (e.g., HP 1300) to the oil sink.
5. Does this part fit other Rolex calibers like 2130 or 2135?
No. The 2230/2235 platform is a distinct movement architecture from the 2130/2135 family. Center jewel dimensions and mounting positions differ between these calibers and are not interchangeable. Always verify compatibility using the official Rolex parts catalog for your specific caliber.
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