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This is a genuine Omega Caliber 8500 barrel bridge (Part Number: 7228500A1004118), an original Swiss‑made component for the Omega Caliber 8500 and 8501 Co‑Axial movements. As a critical structural part of the movement, it secures the mainspring barrel and the gear train, ensuring precise alignment of the wheels for stable power transmission. Replacing this component is essential when the original bridge shows signs of wear, deformation, or stripped thread holes, helping to restore the movement‘s reliability and accuracy.
Genuine Omega Part – Swiss factory‑original for Caliber 8500/8501, not a copy.
Core Barrel & Train Bridge – Houses the jewels and pivot holes for both the mainspring barrel and the gear train, ensuring precise wheel alignment.
Precision Machined – Jewel holes, screw threads, and locating pins are manufactured to tight tolerances for consistent assembly.
Essential for Service – Replaces worn jewel holes, stripped threads, or deformed bridges to restore movement stability.
Compatible Movement – Designed for Omega Caliber 8500, 8501, and other 8500 series platform calibers.
| Parameter | Details |
|---|---|
| Part Name | Barrel Bridge |
| Part Number | Omega 7228500A1004118 |
| Compatible Movements | Omega Caliber 8500, 8501, and other 8500 series platform calibers |
| Function | Secures the mainspring barrel and gear train, maintains wheel alignment |
| Material | High‑strength alloy (precision machined) |
| Origin | Switzerland |
| Condition | Brand new, genuine |
Omega Caliber 8500, 8501 Co‑Axial automatic movements (found in Seamaster, De Ville, Constellation collections).
Replacing barrel bridges with worn jewel holes that cause unstable amplitude or timekeeping errors during service.
Repairing gear train binding or poor power transmission caused by stripped threads or a deformed bridge.
1. Is this a genuine Omega barrel bridge?
Yes. It is a Swiss factory‑original part (7228500A1004118) for Caliber 8500/8501, not a copy.
2. How can I tell if the barrel bridge needs replacement?
Common signs: worn jewel holes causing excessive gear endshake; stripped screw threads that cannot be tightened; visible bridge deformation causing gear train binding.
3. Does this bridge fit the 8501 precious metal version?
Yes. The 8500 and 8501 share the same bridge geometry (only the rotor and some bridges are 18K red gold on the 8501; the barrel bridge is identical).
4. What should I pay attention to during installation?
Clean all jewel holes and screw threads before assembly. Ensure all wheel pivots drop into their respective jewels. Use a proper precision screwdriver, tighten screws in a crossing pattern, and follow the torque specifications in the Omega technical guide. Professional installation is strongly recommended.
5. Does the new bridge require lubrication after installation?
Yes. After installing the new bridge, apply the correct amount of dedicated lubricants (e.g., Moebius 9010, HP 1300) to the jewel holes following Omega‘s lubrication specifications.
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