---
description: "Genuine Seiko NH35/NH36/NH38 fourth wheel and pinion #0241010. Gear train component restores accurate timekeeping. Japanese quality."
title: "SEIKO (SII) NH35/NH36/NH38 Fourth Wheel And Pinion #0241010 - Sofly"
image: https://www.soflypart.com/wp-content/uploads/2019/05/NH36S.jpg
---
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- **SEIKO (SII) NH35/NH36/NH38 Fourth Wheel And Pinion #0241010**
[](https://www.soflypart.com/wp-content/uploads/2019/05/NH36S.jpg)
# SEIKO (SII) NH35/NH36/NH38 Fourth Wheel And Pinion #0241010
$2.00
You Saved
| Brand | Choose an option SEIKO- 
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $2.00 |
| 3 - 4 | 5% | $1.90 |
| 5 - 9 | 7% | $1.86 |
| 10 - 14 | 10% | $1.80 |
| 15+ | 15% | $1.70 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $2.00 |
| 3 - 4 | 5% | $1.90 |
| 5 - 9 | 7% | $1.86 |
| 10 - 14 | 10% | $1.80 |
| 15+ | 15% | $1.70 |
SEIKO (SII) NH35/NH36/NH38 Fourth Wheel And Pinion #0241010 quantity
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## Product Description
The **SEIKO (SII) NH35/NH36/NH38 Fourth Wheel and Pinion (#0241010)** is a genuine Japanese-made component for the popular NH35, NH36, and NH38 automatic movements. As a critical part of the gear train, the fourth wheel connects to the escape wheel, transmitting power to regulate the movement’s timekeeping accuracy. The integrated pinion ensures precise power transmission, making this brand new original part essential for watchmakers restoring proper movement function when the original component becomes worn or damaged.
## Features & Function
- **Genuine Seiko/SII part** – authentic Japanese-made component for NH35, NH36, and NH38 movements
- **Gear train component** – connects to the escape wheel for regulating timekeeping accuracy
- **Integrated pinion design** – ensures precise and efficient power transmission
- **Direct replacement** – drop-in replacement for worn or damaged fourth wheels
## Specifications
- **Part Number**: 0241010
- **Compatible Movements**: Seiko NH35, NH36, NH38 (also known as 4R35/4R36/4R38)
- **Movement Family**: NH Series (Basic Mechanical Series)
- **Movement Frequency**: 21,600 vph (3 Hz)
- **Jewels**: 24
- **Power Reserve**: \~41 hours
- **Hacking**: Yes
- **Hand-Winding**: Yes
- **Origin**: Japan
## Applications
- **Service and overhaul** – replacing worn or damaged fourth wheels in NH35/NH36/NH38 movements
- **Gear train restoration** – ensuring proper power transmission to the escapement for accurate timekeeping
- Suitable for **professional watchmakers** and **experienced repair technicians**
## FAQs
**1. Is this a genuine Seiko/SII part?**
Yes, this is a **genuine Seiko (SII/TMI) factory part** made in Japan. The NH series is manufactured by Seiko Instruments Inc. (SII) and distributed by Time Module Inc. (TMI). The NH prefix indicates the movement is sold without Seiko branding for use by third-party watch manufacturers and the mod community.
**2. Which movements is this fourth wheel compatible with?**
This fourth wheel is compatible with **Seiko NH35, NH36, and NH38** movements. The NH35 is date-only, NH36 adds day-date, and NH38 is a no-date open-heart version . The gear train components are shared across these calibers.
**3. What are the signs that the fourth wheel needs replacement?**
Common signs include **irregular timekeeping, low amplitude, or visible wear/damage** to the teeth or pinion during movement inspection. A qualified watchmaker can diagnose these issues during servicing.
## 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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The integrated pinion ensures precise power transmission, making this brand new original part essential for watchmakers restoring proper movement function when the original component becomes worn or damaged. Features & Function Genuine Seiko/SII part\u00a0\u2013 authentic Japanese-made component for NH35, NH36, and NH38 movements Gear train component\u00a0\u2013 connects to the escape wheel for regulating timekeeping accuracy Integrated pinion design\u00a0\u2013 ensures precise and efficient power transmission Direct replacement\u00a0\u2013 drop-in replacement for worn or damaged fourth wheels Specifications Part Number: 0241010 Compatible Movements: Seiko NH35, NH36, NH38 (also known as 4R35/4R36/4R38) Movement Family: NH Series (Basic Mechanical Series) Movement Frequency: 21,600 vph (3 Hz) Jewels: 24 Power Reserve: ~41 hours Hacking: Yes Hand-Winding: Yes Origin: Japan Applications Service and overhaul\u00a0\u2013 replacing worn or damaged fourth wheels in NH35/NH36/NH38 movements Gear train restoration\u00a0\u2013 ensuring proper power transmission to the escapement for accurate timekeeping Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced repair technicians FAQs 1. 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