---
description: Genuine ETA 7750-728 balance axle for Valjoux 7750. Swiss-made balance staff for shock-absorber system. Essential for chronograph movement repair.
title: ETA 7750 Movement Balance Axel | ETA Watch Movement Parts - Sofly
image: https://www.soflypart.com/wp-content/uploads/2019/06/7750ba.jpg
---
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- **ETA 7750-728 Movement Balance Axle**
[](https://www.soflypart.com/wp-content/uploads/2019/06/7750ba.jpg)
[](https://www.soflypart.com/wp-content/uploads/2019/06/7750bab.jpg)
# ETA 7750-728 Movement Balance Axle
$21.00
You Saved
| Brand | Choose an option ETA- 
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $21.00 |
| 3 - 4 | 5% | $19.95 |
| 5 - 9 | 7% | $19.53 |
| 10 - 14 | 10% | $18.90 |
| 15+ | 15% | $17.85 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $21.00 |
| 3 - 4 | 5% | $19.95 |
| 5 - 9 | 7% | $19.53 |
| 10 - 14 | 10% | $18.90 |
| 15+ | 15% | $17.85 |
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## Product Description
The **ETA 7750-728 Movement Balance Axle** is a genuine Swiss-made component for the ETA/Valjoux 7750 automatic chronograph movement. Known as the balance staff, this axle is the central pivot for the balance wheel, enabling its oscillation and playing a crucial role in timekeeping accuracy . This brand new original part is essential for watchmakers to restore correct amplitude and precision timing when the original balance staff becomes broken or worn.
## Features & Function
- **Genuine ETA part** – authentic Swiss-made component for the ETA 7750 movement
- **Balance staff** – central pivot for the balance wheel, enabling oscillation
- **Critical for timekeeping** – directly affects amplitude and rate stability
- **Shock-absorber compatible** – designed for use with Incabloc shock protection system
- **Direct replacement** – drop-in replacement for broken or worn balance staffs
## Specifications
- **Part Number**: 7750-728
- **Compatible Movements**: ETA/Valjoux 7750, 7751, 7753, 7754, 7760, 7765
- **Part Type**: Balance staff (balance axle) for shock-absorber and annular balance
- **Caliber Diameter**: 30.0 mm (13¼”’)
- **Caliber Height**: 7.9 mm
- **Jewels**: 25
- **Frequency**: 28,800 vph (4 Hz)
- **Lift Angle**: 49°
- **Power Reserve**: \~42–48 hours
- **Shock Protection**: Incabloc system
- **Origin**: Switzerland (ETA factory part)
- **Condition**: Brand new
## Applications
- **Service and overhaul** of ETA 7750-series movements
- **Balance staff replacement** – replacing broken, bent, or worn pivots
- **Timekeeping restoration** – restoring correct amplitude and rate when balance staff is damaged
- 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 7750-728), made in Switzerland. It is not an aftermarket or generic copy .
**2. Which movements is this balance axle compatible with?**
This balance axle is compatible with the **ETA/Valjoux 7750** and its variants, including 7751, 7753, 7754, 7760, and 7765. It is specifically designed for use with the Incabloc shock-absorber system and annular balance .
**3. What is the function of the balance staff?**
The balance staff is the **central axle** of the balance wheel. It allows the balance to oscillate freely and precisely, which is fundamental to the movement’s timekeeping accuracy. A broken or bent staff will cause erratic rate or complete stoppage.
## 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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Known as the balance staff, this axle is the central pivot for the balance wheel, enabling its oscillation and playing a crucial role in timekeeping accuracy\u00a0. This brand new original part is essential for watchmakers to restore correct amplitude and precision timing when the original balance staff becomes broken or worn. Features & Function Genuine ETA part\u00a0\u2013 authentic Swiss-made component for the ETA 7750 movement Balance staff\u00a0\u2013 central pivot for the balance wheel, enabling oscillation Critical for timekeeping\u00a0\u2013 directly affects amplitude and rate stability Shock-absorber compatible\u00a0\u2013 designed for use with Incabloc shock protection system\u00a0 Direct replacement\u00a0\u2013 drop-in replacement for broken or worn balance staffs Specifications Part Number: 7750-728 Compatible Movements: ETA/Valjoux 7750, 7751, 7753, 7754, 7760, 7765 Part Type: Balance staff (balance axle) for shock-absorber and annular balance\u00a0 Caliber Diameter: 30.0 mm (13\u00bc''') Caliber Height: 7.9 mm Jewels: 25 Frequency: 28,800 vph (4 Hz)\u00a0 Lift Angle: 49\u00b0 Power Reserve: ~42\u201348 hours\u00a0 Shock Protection: Incabloc system\u00a0 Origin: Switzerland (ETA factory part) Condition: Brand new Applications Service and overhaul\u00a0of ETA 7750-series movements Balance staff replacement\u00a0\u2013 replacing broken, bent, or worn pivots Timekeeping restoration\u00a0\u2013 restoring correct amplitude and rate when balance staff is damaged Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced repair technicians FAQs 1. 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Features & Function Genuine ETA part\u00a0\u2013 authentic Swiss-made component for the ETA 7750 movement Balance staff\u00a0\u2013 central pivot for the balance wheel, enabling oscillation Critical for timekeeping\u00a0\u2013 directly affects amplitude and rate stability Shock-absorber compatible\u00a0\u2013 designed for use with Incabloc shock protection system\u00a0 Direct replacement\u00a0\u2013 drop-in replacement for broken or worn balance staffs Specifications Part Number: 7750-728 Compatible Movements: ETA/Valjoux 7750, 7751, 7753, 7754, 7760, 7765 Part Type: Balance staff (balance axle) for shock-absorber and annular balance\u00a0 Caliber Diameter: 30.0 mm (13\u00bc''') Caliber Height: 7.9 mm Jewels: 25 Frequency: 28,800 vph (4 Hz)\u00a0 Lift Angle: 49\u00b0 Power Reserve: ~42\u201348 hours\u00a0 Shock Protection: Incabloc system\u00a0 Origin: Switzerland (ETA factory part) Condition: Brand new Applications Service and overhaul\u00a0of ETA 7750-series movements Balance staff replacement\u00a0\u2013 replacing broken, bent, or worn pivots Timekeeping restoration\u00a0\u2013 restoring correct amplitude and rate when balance staff is damaged Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced repair technicians FAQs 1. Is this a genuine ETA part? Yes, this is a\u00a0genuine ETA factory part\u00a0(reference 7750-728), made in Switzerland. It is not an aftermarket or generic copy\u00a0. 2. Which movements is this balance axle compatible with? This balance axle is compatible with the\u00a0ETA/Valjoux 7750\u00a0and its variants, including 7751, 7753, 7754, 7760, and 7765. It is specifically designed for use with the Incabloc shock-absorber system and annular balance\u00a0. 3. What is the function of the balance staff? The balance staff is the\u00a0central axle\u00a0of the balance wheel. It allows the balance to oscillate freely and precisely, which is fundamental to the movement's timekeeping accuracy. A broken or bent staff will cause erratic rate or complete stoppage. 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. 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