---
description: Generic Rolex 4030 mainspring, 1.24×12.5×0.146mm, fits Zenith Daytona automatic chronograph, 31 jewels, 28,800 bph, approx. 50-hour power reserve.
title: Generic Rolex 4030 Mainspring - Sofly
image: https://www.soflypart.com/wp-content/uploads/2020/12/DSC05891.jpg
---
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- **Generic Rolex 4030 Mainspring**
[](https://www.soflypart.com/wp-content/uploads/2020/12/DSC05891.jpg)
# Generic Rolex 4030 Mainspring
$13.00
You Saved
| Brand | Choose an option ROLEX- 
|
| --- | --- |
| Caliber | Choose an option Caliber 4130/4030Clear |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 | — | $13.00 |
| 2 - 4 | 5% | $12.35 |
| 5 - 9 | 7% | $12.09 |
| 10 - 14 | 12% | $11.44 |
| 15+ | 15% | $11.05 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 | — | $13.00 |
| 2 - 4 | 5% | $12.35 |
| 5 - 9 | 7% | $12.09 |
| 10 - 14 | 12% | $11.44 |
| 15+ | 15% | $11.05 |
Generic Rolex 4030 Mainspring quantity
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## Product Description
This is a **generic mainspring for Rolex Caliber 4030**, designed for the **Rolex 4030 automatic chronograph movement** (Zenith Daytona series). This is a **brand new replacement part**, not a Rolex original, measuring **1.24 × 12.5 × 0.146 mm**, suitable for movement repair and servicing .
## Specifications
- **Compatible Movement**：**Rolex Caliber 4030** (Zenith Daytona)
- **Part Number**：**771**
- **Mainspring Size**：**1.24 × 12.5 × 0.146 mm** (height × diameter × thickness)
- **Type**：**Automatic mainspring**
- **Origin**：**Switzerland**
- **Quality**：**Generic replacement** (non-original)
- **Movement Specs**：**31 jewels**, **28,800 bph**, approx. **50-hour power reserve**
## FAQ
**1. Is this mainspring an original Rolex genuine part?**
**No**. This is a **generic replacement**, not a Rolex original, but specifically sized for the 4030 movement.
**2. Which movements is this mainspring compatible with?**
It fits the **Rolex 4030 automatic chronograph movement** (Zenith Daytona series, produced 1988-2000). This movement was based on a modified Zenith El Primero and was Rolex’s last outsourced chronograph caliber .
**3. What tools are needed for mainspring installation?**
A **mainspring winder** and **barrel tools** are required. The 4030 is a precision movement—pay attention to the **sliding attachment** seating. Work should be performed by a **qualified watchmaker**.
## Why Choose SOFLY Watch Parts?
**Fast Worldwide Shipping** – Orders are dispatched within 3 business days.
**Competitive Pricing** – Great value across watch movements, replacement parts and watchmaking tools.
**Extensive Selection** – More than 3,000 watch movements, parts and accessories available.
**Trusted Worldwide** – Trusted by watchmakers, repair professionals and watch enthusiasts worldwide.
**Personalized Sourcing** – Can’t find the part you need? Contact **info@soflypart.com** or WhatsApp **+86 18620212114.**
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