SEIKO (SII) NH05/NH06 Automatic Wheel

Product Description

The SEIKO (SII) NH05/NH06 Automatic Wheel is a genuine Japanese-made component for these compact automatic movements. As part of the movement’s self-winding mechanism, this wheel works with the rotor to convert wrist motion into energy for the mainspring, ensuring efficient and reliable automatic winding. This brand new original part is essential for watchmakers restoring proper automatic winding function when the original component becomes worn or damaged.

Features & Function

• Genuine Seiko/SII part – authentic Japanese-made component for NH05 and NH06 movements

• Automatic winding system component – works with the rotor for efficient self-winding

• NH family compatibility – designed for the compact 7¾”’ NH05 and NH06 calibers 

• Direct replacement – drop-in replacement for worn or damaged automatic wheels

Specifications

• Compatible Movements: Seiko NH05 (date), NH06 (day-date)

• Movement Family: NH0 Series

• Movement Size: 7¾”’ (approx. 17.5mm)

• Movement Height: 5.92mm

• Jewels: 21

• Frequency: 21,600 vph (3 Hz)

• Power Reserve: >40 hours

• Rotor Winding Direction: Bi-directional (Magic Lever) 

• Origin: Japan

Applications

• Service and overhaul – replacing worn or damaged automatic wheels in NH05/NH06 movements

• Automatic winding restoration – resolving issues with reduced self-winding efficiency

• 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 NH05 and NH06 are manufactured by Seiko Instruments Inc. (SII) and distributed by Time Module Inc. (TMI) .

2. Which movements is this automatic wheel compatible with?

This automatic wheel is designed for Seiko NH05 and NH06 movements. The NH05 features a date display while the NH06 adds a day-date complication, but both movements share the same automatic winding system architecture .

3. What are the signs that the automatic wheel needs replacement?

Common signs include reduced winding efficiency, poor power reserve, noisy rotor operation, or visible wear/damage during 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 [email protected] or WhatsApp +86 18620212114.