---
description: Genuine ETA 7750-8290 friction spring for Valjoux 7750. Swiss-made chronograph wheel component for automatic chronograph movement repair.
title: ETA 7750 Movement Friction Spring | ETA Watch Movement Parts - Sofly
image: https://www.soflypart.com/wp-content/uploads/2019/06/7750fs.jpg
---
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- **ETA 7750-8290 Friction Spring**
[](https://www.soflypart.com/wp-content/uploads/2019/06/7750fs.jpg)
[](https://www.soflypart.com/wp-content/uploads/2019/06/7750fsb.jpg)
# ETA 7750-8290 Friction Spring
$6.00
You Saved
| Brand | Choose an option ETA- 
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $6.00 |
| 3 - 4 | 5% | $5.70 |
| 5 - 9 | 7% | $5.58 |
| 10 - 14 | 10% | $5.40 |
| 15+ | 15% | $5.10 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $6.00 |
| 3 - 4 | 5% | $5.70 |
| 5 - 9 | 7% | $5.58 |
| 10 - 14 | 10% | $5.40 |
| 15+ | 15% | $5.10 |
ETA 7750-8290 Friction Spring quantity
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## Product Description
The **ETA 7750-8290 Friction Spring** is a genuine Swiss-made component designed for the ETA/Valjoux 7750 automatic chronograph movement. Pre-assembled for the chronograph wheel, this spring compensates for play in the chronograph wheel teeth, ensuring smooth and precise chronograph hand movement. It is typically replaced when chronograph hand irregularities or excessive amplitude drops are observed.
## Features & Function
- **Genuine ETA/Valjoux part** – authentic Swiss-made component for the ETA 7750 movement
- **Chronograph mechanism component** – pre-assembled for the chronograph wheel
- **Compensates gear play** – ensures smooth and precise chronograph hand movement
- **Direct replacement** – drop-in replacement for worn or damaged friction springs
- **Precision-engineered** – manufactured to ETA’s original specifications
## Specifications
- **Part Number**: 7750-8290
- **Compatible Movements**: ETA/Valjoux 7750, 7751, 7753, 7754, 7760, 7765
- **Function**: Friction spring for chronograph wheel (compensates gear play)
- **Movement Diameter**: 30.0 mm
- **Movement Height**: 7.9 mm
- **Jewels**: 25
- **Frequency**: 28,800 vph (4 Hz)
- **Power Reserve**: \~44–48 hours
- **Origin**: Switzerland (ETA factory part)
- **Condition**: Brand new
## Applications
- **Service and overhaul** of ETA 7750-series movements
- **Chronograph mechanism repair** – replacing worn or damaged friction springs
- **Chronograph hand irregularity correction** – resolving jumping or unsteady chrono hand movement
- **Amplitude restoration** – addressing excessive amplitude drop during chronograph operation
- Suitable for **professional watchmakers** and **experienced repair technicians**
## FAQs
**1. Is this a genuine ETA part?**
Yes, this is a **genuine ETA factory part** (reference 7750-8290), made in Switzerland. It is not an aftermarket or generic copy.
**2. Which movements is this friction spring compatible with?**
This friction spring is compatible with the **ETA/Valjoux 7750** and its variants, including 7751, 7753, 7754, 7760, and 7765.
**3. What is the function of the friction spring?**
The friction spring compensates for play in the chronograph wheel teeth. Insufficient tension can cause irregular chronograph hand movement, while excessive tension can lead to amplitude drop and reduced power reserve.
## 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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Pre-assembled for the chronograph wheel, this spring compensates for play in the chronograph wheel teeth, ensuring smooth and precise chronograph hand movement. It is typically replaced when chronograph hand irregularities or excessive amplitude drops are observed. Features & Function Genuine ETA/Valjoux part\u00a0\u2013 authentic Swiss-made component for the ETA 7750 movement Chronograph mechanism component\u00a0\u2013 pre-assembled for the chronograph wheel Compensates gear play\u00a0\u2013 ensures smooth and precise chronograph hand movement Direct replacement\u00a0\u2013 drop-in replacement for worn or damaged friction springs Precision-engineered\u00a0\u2013 manufactured to ETA's original specifications Specifications Part Number: 7750-8290 Compatible Movements: ETA/Valjoux 7750, 7751, 7753, 7754, 7760, 7765 Function: Friction spring for chronograph wheel (compensates gear play) Movement Diameter: 30.0 mm\u00a0 Movement Height: 7.9 mm\u00a0 Jewels: 25\u00a0 Frequency: 28,800 vph (4 Hz)\u00a0 Power Reserve: ~44\u201348 hours\u00a0 Origin: Switzerland (ETA factory part) Condition: Brand new Applications Service and overhaul\u00a0of ETA 7750-series movements\u00a0 Chronograph mechanism repair\u00a0\u2013 replacing worn or damaged friction springs Chronograph hand irregularity correction\u00a0\u2013 resolving jumping or unsteady chrono hand movement\u00a0 Amplitude restoration\u00a0\u2013 addressing excessive amplitude drop during chronograph operation\u00a0 Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced repair technicians FAQs 1. 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Personalized sourcing support via\u00a0info@soflypart.com\u00a0or WhatsApp\u00a0+86 18620212114.","image":"https://www.soflypart.com/wp-content/uploads/2019/06/7750fs-150x150.jpg","offers":{"@type":"Offer","description":"Product Description The\u00a0ETA 7750-8290 Friction Spring\u00a0is a genuine Swiss-made component designed for the ETA/Valjoux 7750 automatic chronograph movement. Pre-assembled for the chronograph wheel, this spring compensates for play in the chronograph wheel teeth, ensuring smooth and precise chronograph hand movement. It is typically replaced when chronograph hand irregularities or excessive amplitude drops are observed. Features & Function Genuine ETA/Valjoux part\u00a0\u2013 authentic Swiss-made component for the ETA 7750 movement Chronograph mechanism component\u00a0\u2013 pre-assembled for the chronograph wheel Compensates gear play\u00a0\u2013 ensures smooth and precise chronograph hand movement Direct replacement\u00a0\u2013 drop-in replacement for worn or damaged friction springs Precision-engineered\u00a0\u2013 manufactured to ETA's original specifications Specifications Part Number: 7750-8290 Compatible Movements: ETA/Valjoux 7750, 7751, 7753, 7754, 7760, 7765 Function: Friction spring for chronograph wheel (compensates gear play) Movement Diameter: 30.0 mm\u00a0 Movement Height: 7.9 mm\u00a0 Jewels: 25\u00a0 Frequency: 28,800 vph (4 Hz)\u00a0 Power Reserve: ~44\u201348 hours\u00a0 Origin: Switzerland (ETA factory part) Condition: Brand new Applications Service and overhaul\u00a0of ETA 7750-series movements\u00a0 Chronograph mechanism repair\u00a0\u2013 replacing worn or damaged friction springs Chronograph hand irregularity correction\u00a0\u2013 resolving jumping or unsteady chrono hand movement\u00a0 Amplitude restoration\u00a0\u2013 addressing excessive amplitude drop during chronograph operation\u00a0 Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced repair technicians FAQs 1. 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