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This is a genuine Rolex original part, the 3135-0915 shock absorber for the balance bridge (upper shock absorber), a critical protection component on the balance bridge of the Rolex Caliber 3135 and its derivatives (3155, 3185, 3186, etc.). This part utilizes the KIF shock protection system, specifically designed 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 through the conical seating geometry before automatically recentering. As an authentic Rolex part, it is an essential replacement component for the service and repair of the 3135 movement.
Genuine Rolex Part – Swiss factory-original, perfect fit for Caliber 3135 and derivatives.
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 | Shock Absorber for Balance Bridge (upper) |
| Part Number | Rolex 3135-0915 |
| Compatible Movements | Rolex Caliber 3135, 3155, 3185, 3186, 3187, 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 3135 (Datejust, Submariner Date, Sea‑Dweller)
Rolex Caliber 3155 (Day‑Date)
Rolex Caliber 3185/3186 (GMT‑Master II, e.g., 16710, 116710)
Rolex Caliber 3187 (Explorer II 216570)
Replacement of aged, deformed, or damaged shock absorbers during movement service, or repair of balance staff breakage caused by impact
1. Is this a genuine Rolex shock absorber?
Yes. It is a Swiss factory-original part (3135-0915) for Caliber 3135 and derivatives, 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 other calibers beyond 3135?
It fits 3135 and its derivatives (3155, 3185, 3186, 3187). Not for Caliber 3235 (uses Paraflex) or 3035 (different KIF part number).
5. Why does the shock absorber need replacement periodically?
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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