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This is a genuine Rolex balance shock absorber for Caliber 2230 and 2235, part number 2230/2235-0915, Swiss‑made. Utilizing the KIF shock protection system, this absorber is mounted on the upper balance bridge to protect the upper balance staff jewel. When the watch receives an external impact, the shock absorber allows the balance staff pivot to shift slightly, absorbing the shock before automatically recentering, effectively preventing staff breakage or jewel damage. This original factory part is the ideal choice for replacing aged or damaged shock absorbers during movement service.
Genuine Rolex Part – Swiss factory-original for Caliber 2230/2235, not a copy.
KIF Shock Protection – Classic KIF system offering superior impact resistance.
Protects Upper Balance Jewel – Specifically guards the upper balance staff pivot jewel from breakage.
Shock Absorption & Self‑Centering – Conical seating allows pivot to shift and automatically recenter after impact.
Essential for Service – Replaces deformed, cracked, or worn shock absorbers to restore balance protection.
| Parameter | Details |
|---|---|
| Part Name | Balance Shock Absorber |
| Part Number | Rolex 2230/2235-0915 |
| Compatible Movements | Rolex Caliber 2230, 2235 automatic (ladies‘ Datejust, etc.) |
| Shock Protection System | KIF (Typical KIF 1 type) |
| Function | Protects upper balance staff jewel against shocks |
| Origin | Switzerland |
| Condition | Brand new, genuine |
Rolex Caliber 2230 (no‑date ladies‘) and 2235 (date ladies’) automatic movements.
Replacement of aged, deformed, or damaged shock absorbers during movement service.
Repair of movements with broken balance staff or cracked jewels caused by impact.
1. Is this a genuine Rolex shock absorber?
Yes. It is a Swiss factory‑original part (2230/2235-0915) for Caliber 2230/2235, not a copy.
2. What are the symptoms of a damaged shock absorber?
Symptoms: after an impact, the watch runs very inaccurately or stops; a broken balance staff or cracked jewel; excessive balance play due to deformed spring; rattling noise when shaking.
3. What should I pay attention to during installation?
Special tools (shock absorber setting tools and anvil) are required. Ensure the spring is fully seated, and the jewel cup and endstone are correctly oriented. Professional installation is strongly recommended.
4. Does this shock absorber fit both 2230 and 2235?
Yes. Both calibers share the same balance shock protection system; the part is fully interchangeable.
5. Why does the shock absorber need periodic replacement?
The internal spring may fatigue over time, losing elasticity; the jewel cup may crack or wear. It is not always replaced at every service, but if shock protection is compromised or parts are damaged, replacement is necessary.
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