High-Purity Silicon boule Grinder Rotating Blades
Precision rotating blades used in steam turbine grinders for shaping high-purity silicon boules to wafer-ready diameters with conductivity flats. These blades are essential in semiconductor production lines immediately after crystal pulling. They are classified under this tariff item as rotating blades for steam turbines, as they are components of turbine-driven grinding machines.
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 blades are not wholly or chiefly of metal
This alternative covers other rotating blades that do not meet the metal composition requirement.
If the blades are for repair or remanufacture of steam turbines
This item applies to metal blades intended for repair or remanufacture of steam turbines.
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
• Clearly document the blades' role in steam turbine-driven grinders to justify classification under this tariff item
• Ensure the blades are made of metal to qualify for the primary classification
• Verify if any end-use provisions or duty relief programs apply to semiconductor manufacturing equipment
Related Products under Tariff item 8406.90.23
Czochralski Crystal Puller Rotating Blades
Rotating blades designed for Czochralski crystal pullers, which are machines used to grow monocrystalline silicon boules for semiconductor wafers. These blades facilitate the precise rotation and dipping of the seed crystal during the growth process. They are classified under this tariff item as rotating blades for steam turbines, as they are integral to the turbine-driven mechanisms in such equipment.
Float Zone Crystal Grower Stationary Blades
Stationary blades used in float zone crystal growers, which are machines for producing high-purity silicon ingots for semiconductor wafers. These blades maintain precise positioning during the float zone melting process and support the RF coil and zone movement. They are classified as stationary blades for steam turbines under this tariff item.
Gallium Arsenide Crystal Grinder Turbine Blades
Rotating and stationary turbine blades for steam-powered grinders used to process gallium arsenide boules for compound semiconductor wafers. These blades are critical for shaping boules to exact diameters and creating flats for resistivity indication. They are classified under this tariff item as blades for steam turbines, given their use in turbine-driven grinding machinery.
Monocrystalline Boule Slicer Stationary Guide Blades
Stationary guide blades used in wafer slicing saws driven by steam turbines, which align the diamond wire or blade during boule slicing into thin semiconductor wafers. These blades maintain precision cuts for optimal wafer yield. They are classified under this tariff item as stationary blades for steam turbines, given their integration into turbine-driven slicing equipment.
RF Float Zone Turbine Stationary Support Blades
Stationary support blades in steam turbine systems for RF float zone crystal growers, which stabilize zone translation for ultra-pure silicon rods. These blades are essential for minimizing oxygen impurities in semiconductor material. They are classified under this tariff item as stationary blades for steam turbines, as they are components of turbine-driven crystal growing equipment.
Silicon Wafer Lapping Stationary Turbine Blades
Stationary blades in steam turbine-driven lappers that flatten silicon wafer surfaces to nanometer tolerances post-slicing for semiconductor fabrication. These blades guide lapping plates for ultimate flatness. They are classified under this tariff item as stationary blades for steam turbines, given their role in turbine-driven lapping machinery.