Steam Turbine-Driven Wafer Grinder Rotating Blades
Rotating blades for wafer grinders powered by steam turbines, used to grind semiconductor crystal boules to precise diameters post-growth. These blades ensure accurate flats indicating conductivity type for wafer production. They are classified under this tariff item as other rotating blades for steam turbines, not for repair or remanufacture.
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 part of a complete wafer grinding machine
Machines for grinding semiconductor wafers are classified under heading 84.86, which overrides parts classification.
If the blades are made wholly or chiefly of metal and for repair or remanufacture
Blades for repair or remanufacture are classified under this sibling item.
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 these blades as steam turbine parts and provide the CBSA with evidence of their use in steam-powered grinders
• Confirm if the blades are eligible for preferential duty rates
• Keep records of the blades' specifications to support the classification
Related Products under Tariff item 8406.90.37
Czochralski Crystal Puller Rotating Blades
Rotating blades designed for Czochralski crystal pullers, which are machines used in the manufacture of semiconductor boules. These blades facilitate the precise rotation and dipping of the seed crystal, a critical function in the crystal growth process. They are classified under this tariff item as other rotating blades for steam turbines, as they are not specifically for repair or remanufacture.
Float Zone Crystal Grower Stationary Blades
Stationary blades used in float zone crystal growers, which are machines for producing high-purity silicon ingots. These blades maintain precise positioning during the float zone melting process, supporting the RF coil and zone movement. They are classified under this tariff item as other stationary blades for steam turbines, not being for repair or remanufacture.
Gallium Arsenide Crystal Grinder Turbine Blades
Rotating and stationary turbine blades for steam-powered grinders used to process gallium arsenide boules. These blades are integral to the grinding machinery, which shapes the boules to exact diameters for semiconductor wafers. They are classified under this tariff item as other blades for steam turbines, not for repair or remanufacture.
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. These blades are essential for the grinding process that prepares boules for semiconductor wafer production. They are classified under this tariff item as other rotating blades for steam turbines, not for repair or remanufacture.
Monocrystalline Boule Slicer Stationary Guide Blades
Stationary guide blades used in wafer slicing saws driven by steam turbines, aligning the diamond wire or blade during boule slicing. These blades ensure precision cuts for optimal wafer yield in semiconductor manufacturing. They are classified under this tariff item as other stationary blades for steam turbines, not for repair or remanufacture.
RF Float Zone Turbine Stationary Support Blades
Stationary support blades in steam turbine systems for RF float zone crystal growers, stabilizing zone translation for ultra-pure silicon rods. These blades are critical for minimizing oxygen impurities in semiconductor material. They are classified under this tariff item as other stationary blades for steam turbines, not for repair or remanufacture.