Omega 8500 Movement Oscillating Weight Bolt 7228500A52120 (Single Piece)

Product Description

The Omega 8500 Movement Oscillating Weight Bolt (7228500A52120) is a genuine Swiss-made component designed for the Omega Caliber 8500 Co‑Axial automatic movement. This bolt is used to secure the oscillating weight (rotor) to the movement, ensuring proper rotor fixation, smooth winding efficiency, and long‑term movement reliability. Supplied as a single piece, it is ideal for professional repairs, rotor servicing, and OEM‑level restorations.

Features & Function

• Genuine Omega part – authentic Swiss-made component for Caliber 8500

• Rotor fixation – secures the oscillating weight (rotor) in place

• Ensures smooth winding – proper fixation maintains efficient automatic winding

• Precision-engineered – manufactured to Omega’s factory specifications

• Single piece supply – ideal for targeted repairs and rotor servicing

Specifications

• Part Number: 7228500A52120

• Compatible Movement: Omega Caliber 8500 (Co‑Axial automatic)

• Movement Diameter: 29.00 mm (12¾”’)

• Movement Height: 5.5 mm

• Jewels: 39

• Frequency: 25,200 vph (3.5 Hz)

• Power Reserve: 60 hours (two series‑coupled barrels)

• Origin: Switzerland (Omega factory part)

• Quantity: 1 piece

• Condition: Brand new

Applications

• Service and overhaul of Omega Caliber 8500 movements

• Rotor servicing – replacing worn, stripped, or loose rotor bolts

• Restoration of De Ville Hour Vision, Seamaster Aqua Terra, and other 8500‑powered models

• Suitable for professional watchmakers and authorized service centers

FAQs

1. Is this a genuine Omega part?

Yes, this is a genuine Omega factory part (reference 7228500A52120), manufactured in Switzerland. It is listed in the official Omega 8500 spare parts list under “Screw for oscillating weight”.

2. Which movement is this bolt compatible with?

This bolt is specifically designed for the Omega Caliber 8500 automatic movement. Please verify your movement caliber before ordering.

3. How many bolts does the Caliber 8500 rotor require?

The Caliber 8500 rotor is secured using a single bolt that passes through the rotor’s centre hole and threads into the movement’s rotor axle. This listing is for one single bolt.

Why Choose SOFLY Watch Parts?

• Fast worldwide shipping within 3 business days.

• Competitive pricing on Seiko/Hattori calibers.

• 3,000+ watch movements and parts in stock.

• Trusted by watchmakers worldwide.

• Personalized sourcing support via [email protected] or WhatsApp +86 18620212114.