--- description: Genuine Seiko NH05/NH06 third wheel for compact automatic movement. Gear train component restores accurate timekeeping. Japanese quality. title: SEIKO (SII) NH05/NH06 Third Wheel - Sofly image: https://www.soflypart.com/wp-content/uploads/2019/05/NH05T.jpg --- [Skip to content](#content) * [ Home ](https://www.soflypart.com "Home") * [Products](https://www.soflypart.com/shop/ "Products") * [Watch Movement Parts](https://www.soflypart.com/product-category/watch-parts/movement-parts/ "Watch Movement Parts") * [Watch Parts](https://www.soflypart.com/product-category/watch-parts/ "Watch Parts") * **SEIKO (SII) NH05/NH06 Third Wheel** [![SEIKO (SII) NH05/NH06 Third Wheel](https://www.soflypart.com/wp-content/uploads/2019/05/NH05T.jpg.webp)](https://www.soflypart.com/wp-content/uploads/2019/05/NH05T.jpg) # SEIKO (SII) NH05/NH06 Third Wheel $1.50 You Saved | Brand | Choose an optionSEIKO![SEIKO](https://www.soflypart.com/wp-content/uploads/2023/06/42.jpg)[Clear](#) | | ----- | ---------------------------------------------------------------------------------------------------- | ### Discount | Quantity | Discount (%) | Price | | -------- | ------------ | ----- | | 1 - 2 | — | $1.50 | | 3 - 4 | 5 % | $1.43 | | 5 - 9 | 7 % | $1.40 | | 10 - 14 | 10 % | $1.35 | | 15+ | 15 % | $1.28 | ### Discount | Quantity | Discount (%) | Price | | -------- | ------------ | ----- | | 1 - 2 | — | $1.50 | | 3 - 4 | 5 % | $1.43 | | 5 - 9 | 7 % | $1.40 | | 10 - 14 | 10 % | $1.35 | | 15+ | 15 % | $1.28 | SEIKO (SII) NH05/NH06 Third Wheel quantity Add to cart x [ Checkout ](https://www.soflypart.com/checkout/) * repair Covers 99% of Repair Needs * Wholesale Discounts * Fast Global Shipping * 24/7 Customer Support ## Product Description The **SEIKO (SII) NH05/NH06 Third Wheel** is a genuine Japanese-made component for these compact automatic movements, measuring 7¾”’ (approx. 17.5mm) in diameter . As a key part of the gear train, the third wheel transmits power from the center wheel onward to the fourth wheel and escapement, playing a critical role in maintaining stable amplitude and accurate timekeeping . This brand new original part is essential for watchmakers restoring proper power transmission and timekeeping accuracy when the original gear train component becomes worn or damaged. ## Features & Function * **Genuine Seiko/SII part** – authentic Japanese-made component for NH05 and NH06 movements * **Gear train component** – transmits power from the center wheel to the fourth wheel and escapement * **21-jewel movement** – part of the 21-jewel NH0 series architecture * **NH0 family compatibility** – designed for the compact 7¾”’ NH05 (date) and NH06 (day-date) calibers ## 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 * **Crown Positions**: Normal (manual winding), 1st click (date/day setting), 2nd click (time setting) * **Origin**: Japan ## Applications * **Service and overhaul** – replacing worn or damaged third wheels in NH05/NH06 movements * **Gear train restoration** – ensuring stable power delivery 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 NH05 and NH06 are manufactured by Seiko Instruments Inc. (SII) and distributed by Time Module Inc. (TMI) . **2\. Which movements is this third wheel compatible with?** This third 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 share the same basic gear train architecture . **3\. What are the signs that the third wheel needs replacement?** Common signs include **worn or damaged teeth, irregular timekeeping, low amplitude**, or **visible wear** 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**. ##### Our Popular Items [ ![Rolex 4130 Mainspring](https://www.soflypart.com/wp-content/uploads/2020/12/DSC05891.jpg.webp) ](https://www.soflypart.com/product/generic-rolex-caliber-1220-1225-mainspring/) ### [Generic Rolex Caliber 1220/1225 Mainspring ](https://www.soflypart.com/product/generic-rolex-caliber-1220-1225-mainspring/) [ ![Rolex 4130 Mainspring](https://www.soflypart.com/wp-content/uploads/2020/12/DSC05891.jpg.webp) ](https://www.soflypart.com/product/generic-rolex-4030-mainspring/) ### [Generic Rolex 4030 Mainspring ](https://www.soflypart.com/product/generic-rolex-4030-mainspring/) [ ![Rolex 4130 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Gear train component restores accurate timekeeping. Japanese quality.","sku":"100202","category":"Watch Parts > Watch Movement Parts","mainEntityOfPage":{"@id":"https://www.soflypart.com/product/tmi-seiko-nh05-movement-third-wheel/#webpage"},"image":[{"@type":"ImageObject","url":"https://www.soflypart.com/wp-content/uploads/2019/05/NH05T.jpg","height":"580","width":"580"}],"url":"https://www.soflypart.com/product/tmi-seiko-nh05-movement-third-wheel/","productGroupID":"100202","hasVariant":[{"@type":"Product","sku":"100202","name":"SEIKO (SII) NH05/NH06 Third Wheel - SEIKO","description":"Product Description The\u00a0SEIKO (SII) NH05/NH06 Third Wheel\u00a0is a genuine Japanese-made component for these compact automatic movements, measuring 7\u00be''' (approx. 17.5mm) in diameter\u00a0. As a key part of the gear train, the third wheel transmits power from the center wheel onward to the fourth wheel and escapement, playing a critical role in maintaining stable amplitude and accurate timekeeping\u00a0. This brand new original part is essential for watchmakers restoring proper power transmission and timekeeping accuracy when the original gear train component becomes worn or damaged. Features & Function Genuine Seiko/SII part\u00a0\u2013 authentic Japanese-made component for NH05 and NH06 movements\u00a0 Gear train component\u00a0\u2013 transmits power from the center wheel to the fourth wheel and escapement 21-jewel movement\u00a0\u2013 part of the 21-jewel NH0 series architecture\u00a0 NH0 family compatibility\u00a0\u2013 designed for the compact 7\u00be''' NH05 (date) and NH06 (day-date) calibers\u00a0 Specifications Compatible Movements: Seiko NH05 (date), NH06 (day-date)\u00a0 Movement Family: NH0 Series Movement Size: 7\u00be''' (approx. 17.5mm)\u00a0 Movement Height: 5.92mm\u00a0 Jewels: 21\u00a0 Frequency: 21,600 vph (3 Hz)\u00a0 Power Reserve: >40 hours\u00a0 Crown Positions: Normal (manual winding), 1st click (date/day setting), 2nd click (time setting)\u00a0 Origin: Japan Applications Service and overhaul\u00a0\u2013 replacing worn or damaged third wheels in NH05/NH06 movements Gear train restoration\u00a0\u2013 ensuring stable power delivery to the escapement for accurate timekeeping\u00a0 Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced repair technicians FAQs 1. Is this a genuine Seiko/SII part? Yes, this is a\u00a0genuine Seiko (SII/TMI) factory part\u00a0made in Japan. The NH05 and NH06 are manufactured by Seiko Instruments Inc. (SII) and distributed by Time Module Inc. (TMI)\u00a0. 2. Which movements is this third wheel compatible with? This third wheel is designed for\u00a0Seiko NH05 and NH06\u00a0movements. The NH05 features a date display, while the NH06 adds a day-date complication, but both share the same basic gear train architecture\u00a0. 3. What are the signs that the third wheel needs replacement? Common signs include\u00a0worn or damaged teeth, irregular timekeeping, low amplitude, or\u00a0visible wear\u00a0during 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\u00a0info@soflypart.com\u00a0or WhatsApp\u00a0+86 18620212114.","image":"https://www.soflypart.com/wp-content/uploads/2019/05/NH05T-150x150.jpg","offers":{"@type":"Offer","description":"Product Description The\u00a0SEIKO (SII) NH05/NH06 Third Wheel\u00a0is a genuine Japanese-made component for these compact automatic movements, measuring 7\u00be''' (approx. 17.5mm) in diameter\u00a0. As a key part of the gear train, the third wheel transmits power from the center wheel onward to the fourth wheel and escapement, playing a critical role in maintaining stable amplitude and accurate timekeeping\u00a0. This brand new original part is essential for watchmakers restoring proper power transmission and timekeeping accuracy when the original gear train component becomes worn or damaged. Features & Function Genuine Seiko/SII part\u00a0\u2013 authentic Japanese-made component for NH05 and NH06 movements\u00a0 Gear train component\u00a0\u2013 transmits power from the center wheel to the fourth wheel and escapement 21-jewel movement\u00a0\u2013 part of the 21-jewel NH0 series architecture\u00a0 NH0 family compatibility\u00a0\u2013 designed for the compact 7\u00be''' NH05 (date) and NH06 (day-date) calibers\u00a0 Specifications Compatible Movements: Seiko NH05 (date), NH06 (day-date)\u00a0 Movement Family: NH0 Series Movement Size: 7\u00be''' (approx. 17.5mm)\u00a0 Movement Height: 5.92mm\u00a0 Jewels: 21\u00a0 Frequency: 21,600 vph (3 Hz)\u00a0 Power Reserve: >40 hours\u00a0 Crown Positions: Normal (manual winding), 1st click (date/day setting), 2nd click (time setting)\u00a0 Origin: Japan Applications Service and overhaul\u00a0\u2013 replacing worn or damaged third wheels in NH05/NH06 movements Gear train restoration\u00a0\u2013 ensuring stable power delivery to the escapement for accurate timekeeping\u00a0 Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced repair technicians FAQs 1. Is this a genuine Seiko/SII part? Yes, this is a\u00a0genuine Seiko (SII/TMI) factory part\u00a0made in Japan. The NH05 and NH06 are manufactured by Seiko Instruments Inc. (SII) and distributed by Time Module Inc. (TMI)\u00a0. 2. Which movements is this third wheel compatible with? This third wheel is designed for\u00a0Seiko NH05 and NH06\u00a0movements. The NH05 features a date display, while the NH06 adds a day-date complication, but both share the same basic gear train architecture\u00a0. 3. What are the signs that the third wheel needs replacement? Common signs include\u00a0worn or damaged teeth, irregular timekeeping, low amplitude, or\u00a0visible wear\u00a0during 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\u00a0info@soflypart.com\u00a0or WhatsApp\u00a0+86 18620212114.","price":"1.5","priceCurrency":"USD","availability":"http://schema.org/InStock","itemCondition":"NewCondition","priceValidUntil":"2027-12-31","url":"https://www.soflypart.com/product/tmi-seiko-nh05-movement-third-wheel/?attribute_pa_brand=brand-seiko"}}],"@id":"https://www.soflypart.com/product/tmi-seiko-nh05-movement-third-wheel/#richSnippet"}]} ```