Crystal Boule Grinder Spindle
A high-precision spindle assembly for crystal grinders that shape semiconductor boules to exact wafer diameters and grind orientation flats. It is a part of the crystal grinding machines of tariff item 8479.89.10, essential for diameter control and flat marking per conductivity specifications.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the spindle is a general-purpose transmission shaft
General transmission shafts are classified in heading 84.83, not as parts of specific machines.
If imported with the grinder as a complete machine
When shipped together with the grinder, the spindle may be considered part of the complete machine.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Classify as a part of the crystal grinder (8479.89.10) and provide technical specifications showing its exclusive use
• Be prepared to demonstrate that the spindle is not a general-use item, as such parts may fall under Section XV
• Keep records of the grinder model it is designed for
Related Products under Tariff item 8479.90.90
Boule Grinder Diameter Gauge
An in-process laser diameter measurement gauge used with crystal boule grinders, providing real-time feedback to CNC controls to ensure wafers cut from boules meet SEMI diameter tolerances of ±0.5 mm. It is a part of the crystal grinding machines of tariff item 8479.89.10, as it contributes to the machine's individual function of shaping semiconductor boules.
Crystal Grower Crucible Rotation Mechanism
A motorized rotation drive for quartz crucibles in Czochralski crystal pullers, ensuring uniform dopant distribution during silicon ingot growth. It is a part of the crystal pulling machines of tariff item 8479.89.10, critical for consistent resistivity across the boule diameter.
Crystal Puller Seed Clip Holder
A high-temperature seed crystal holder for Czochralski pullers that dips the seed into silicon melt to initiate controlled boule growth, made from specialized molybdenum alloys. It is a part of the crystal pulling machines of tariff item 8479.89.10.
Czochralski Crystal Puller Heater Assembly
A replacement heater coil assembly for Czochralski crystal pullers used in growing monocrystalline silicon boules for semiconductor wafers, maintaining precise temperatures during the crystal growth process. It is a part of the crystal pulling machines of tariff item 8479.89.10.
Float Zone Crystal Grower RF Coil
A radio frequency induction coil replacement part for float zone crystal growers that produce high-purity silicon crystals for semiconductor wafers, essential for localized melting in the zone refining process. It is a part of the crystal growing machines of tariff item 8479.89.10.
Lapper Slurry Flow Controller
A precision flow control valve assembly for wafer lapping machines that regulates nanoliter/minute slurry delivery for consistent material removal rates, maintaining bow/warp specifications. It is a part of the wafer lapping machines of tariff item 8479.89.10.