---
description: Genuine Omega 8500 oscillating weight bolt 7228500A52120 for Caliber 8500. Swiss original rotor screw for movement repair.
title: Omega 8500 Movement Oscillating Weight Bolt (Single Piece) - Sofly
image: https://www.soflypart.com/wp-content/uploads/2019/06/8500A52120.jpg
---
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- **Omega 8500 Movement Oscillating Weight Bolt 7228500A52120 (Single Piece)**
[](https://www.soflypart.com/wp-content/uploads/2019/06/8500A52120.jpg)
[](https://www.soflypart.com/wp-content/uploads/2019/06/8500A52120B.jpg)
# Omega 8500 Movement Oscillating Weight Bolt 7228500A52120 (Single Piece)
$33.00
You Saved
| Brand | Choose an option Omega- 
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $33.00 |
| 3 - 4 | 5% | $31.35 |
| 5+ | 7% | $30.69 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $33.00 |
| 3 - 4 | 5% | $31.35 |
| 5+ | 7% | $30.69 |
Omega 8500 Movement Oscillating Weight Bolt 7228500A52120 (Single Piece) quantity
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## 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 **info@soflypart.com** or WhatsApp **+86 18620212114**.
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This bolt is used to secure the oscillating weight (rotor) to the movement, ensuring proper rotor fixation, smooth winding efficiency, and long\u2011term movement reliability. Supplied as a single piece, it is ideal for professional repairs, rotor servicing, and OEM\u2011level restorations. Features & Function Genuine Omega part\u00a0\u2013 authentic Swiss-made component for Caliber 8500 Rotor fixation\u00a0\u2013 secures the oscillating weight (rotor) in place Ensures smooth winding\u00a0\u2013 proper fixation maintains efficient automatic winding Precision-engineered\u00a0\u2013 manufactured to Omega's factory specifications Single piece supply\u00a0\u2013 ideal for targeted repairs and rotor servicing Specifications Part Number: 7228500A52120 Compatible Movement: Omega Caliber 8500 (Co\u2011Axial automatic) Movement Diameter: 29.00 mm (12\u00be''') Movement Height: 5.5 mm Jewels: 39 Frequency: 25,200 vph (3.5 Hz) Power Reserve: 60 hours (two series\u2011coupled barrels) Origin: Switzerland (Omega factory part) Quantity: 1 piece Condition: Brand new Applications Service and overhaul\u00a0of Omega Caliber 8500 movements Rotor servicing\u00a0\u2013 replacing worn, stripped, or loose rotor bolts Restoration\u00a0of De Ville Hour Vision, Seamaster Aqua Terra, and other 8500\u2011powered models Suitable for\u00a0professional watchmakers\u00a0and\u00a0authorized service centers FAQs 1. Is this a genuine Omega part? Yes, this is a\u00a0genuine Omega factory part\u00a0(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\u00a0Omega Caliber 8500\u00a0automatic 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\u00a0info@soflypart.com\u00a0or WhatsApp\u00a0+86 18620212114.","image":"https://www.soflypart.com/wp-content/uploads/2019/06/8500A52120-150x150.jpg","offers":{"@type":"Offer","description":"Product Description The\u00a0Omega 8500 Movement Oscillating Weight Bolt (7228500A52120)\u00a0is a genuine Swiss-made component designed for the\u00a0Omega Caliber 8500\u00a0Co\u2011Axial automatic movement. This bolt is used to secure the oscillating weight (rotor) to the movement, ensuring proper rotor fixation, smooth winding efficiency, and long\u2011term movement reliability. Supplied as a single piece, it is ideal for professional repairs, rotor servicing, and OEM\u2011level restorations. Features & Function Genuine Omega part\u00a0\u2013 authentic Swiss-made component for Caliber 8500 Rotor fixation\u00a0\u2013 secures the oscillating weight (rotor) in place Ensures smooth winding\u00a0\u2013 proper fixation maintains efficient automatic winding Precision-engineered\u00a0\u2013 manufactured to Omega's factory specifications Single piece supply\u00a0\u2013 ideal for targeted repairs and rotor servicing Specifications Part Number: 7228500A52120 Compatible Movement: Omega Caliber 8500 (Co\u2011Axial automatic) Movement Diameter: 29.00 mm (12\u00be''') Movement Height: 5.5 mm Jewels: 39 Frequency: 25,200 vph (3.5 Hz) Power Reserve: 60 hours (two series\u2011coupled barrels) Origin: Switzerland (Omega factory part) Quantity: 1 piece Condition: Brand new Applications Service and overhaul\u00a0of Omega Caliber 8500 movements Rotor servicing\u00a0\u2013 replacing worn, stripped, or loose rotor bolts Restoration\u00a0of De Ville Hour Vision, Seamaster Aqua Terra, and other 8500\u2011powered models Suitable for\u00a0professional watchmakers\u00a0and\u00a0authorized service centers FAQs 1. 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