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The Omega 8500 Co-Axial Wheel (7228500A30040) is a precision replacement component designed for the Omega Caliber 8500 series Co-Axial escapement systems. As a critical element in the co-axial mechanism, it contributes to stable energy transfer and consistent timekeeping performance when restoring or servicing the movement. It is ideal for professional watchmakers performing repairs or overhauls where the original co-axial wheel is worn, damaged, or requires replacement to return the escapement to proper working condition.
Genuine Omega part – authentic component for Caliber 8500 Co-Axial escapement
Co-Axial escapement component – works with the co-axial escapement system for precise energy transmission
Reduced friction design – co-axial technology requires less lubrication and extends service intervals
Restores timekeeping performance – ensures stable energy transfer and consistent rate
Precision-engineered – manufactured to Omega’s factory specifications
Part Number: 7228500A30040
Compatible Movement: Omega Caliber 8500 series (8500A, 8500B, 8500G)
Movement Diameter: 29.00 mm
Movement Height: 5.5 mm
Jewels: 39
Frequency: 25,200 vph (3.5 Hz)
Power Reserve: 60 hours
Escapement Type: Co-Axial
Origin: Switzerland (Omega factory part)
Condition: Brand new
Service and overhaul of Omega Caliber 8500 series movements
Co-Axial escapement repair – replacing worn or damaged co-axial wheels
Timekeeping restoration – ensuring consistent rate and amplitude
Restoration of De Ville Hour Vision, Seamaster Aqua Terra, Constellation, and other 8500‑powered models
Suitable for professional watchmakers and authorized service centers
1. Is this a genuine Omega part?
Yes, this is a genuine Omega factory part (reference 7228500A30040), manufactured in Switzerland. It is not an aftermarket or generic component.
2. Which movement versions is this co-axial wheel compatible with?
This co-axial wheel is compatible with Omega Caliber 8500A, 8500B, and 8500G versions. Please verify your movement version before ordering.
3. What is the function of the co-axial wheel?
The co-axial wheel is part of the Co-Axial escapement system – a revolutionary technology developed by Dr. George Daniels and adopted by Omega. It reduces friction, improves long-term accuracy, and requires less frequent servicing compared to traditional lever escapements.
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