SEIKO (SII) NH35/NH36/NH38 Cannon Pinion #0225420

Product Description

The SEIKO (SII) NH35/NH36/NH38 Cannon Pinion (#0225420) is a genuine Japanese-made component for the popular NH35, NH36, and NH38 automatic movements . As a core part of the motion work, the cannon pinion (also known as the minute wheel) drives the minute hand and connects to the center wheel to ensure precise minute tracking . This brand new original part is essential for watchmakers restoring proper hand function when the original cannon pinion becomes worn or damaged.

Features & Function

• Genuine Seiko/SII part – authentic Japanese-made component for NH35, NH36, and NH38 movements

• Motion work component – drives the minute hand for accurate time display

• Connects to center wheel – ensures precise minute tracking and power transmission

• NH family compatibility – designed for the most popular NH series calibers

• Direct replacement – drop-in replacement for worn or damaged cannon pinions

Specifications

• Part Number: 0225420

• Compatible Movements: Seiko NH35, NH36, NH37, NH38, NH39 (also known as 4R35/36/37/38/39) 

• 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 cannon pinions in NH35/NH36/NH38 movements

• Motion work restoration – ensuring smooth and accurate hand alignment

• Minute hand repair – resolving issues with loose, slipping, or irregular minute hand operation 

• 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).

2. Which movements is this cannon pinion compatible with?

This cannon pinion is compatible with Seiko NH35, NH36, NH37, NH38, and NH39 movements . These are based on the same architecture, with differences in complications: NH35 is date-only, NH36 adds day-date, NH37 adds a 24-hour indicator, NH38 is no-date open-heart, and NH39 adds a 24-hour subdial .

3. What are the signs that the cannon pinion needs replacement?

Common signs include minute hand not advancing correctly, slipping when setting the time, loose minute hand, or visible wear/damage during inspection. As noted by watchmakers, damage to the cannon pinion can prevent proper hand installation . A qualified watchmaker can diagnose these issues.

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.

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• Personalized sourcing support via [email protected] or WhatsApp +86 18620212114.