Crystal Boule Grinder Capstan Drum
A rotary capstan drum for crystal grinders that shape semiconductor boules to precise wafer diameters and flats indicating conductivity. This product is a part suitable for use solely or principally with machinery of heading 84.25, specifically capstan drums used in semiconductor boule grinding.
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 imported as a complete capstan drum
Complete capstan drums of heading 84.25 are classified under 8425.
If the drum is not solely or principally used with machinery of heading 84.25
Parts not identifiable as for a specific machine may fall under residual heading 8479.
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
• Ensure the capstan drum is classified as a part of machinery of heading 84.25 and not as a complete machine
• Provide technical documentation to the CBSA to support the classification
• Verify whether the drum is imported separately or as part of a complete grinder, as this may affect the applicable tariff treatment
Related Products under Tariff item 8431.10.00
Boule Flattener Drive Capstan
A drive capstan for grinding flats on crystal boules to indicate conductivity type. This product is a part suitable for use solely or principally with machinery of heading 84.25, specifically capstans used in semiconductor boule grinding equipment.
Boule Wafer Edge Profiling Tool
A diamond wheel assembly for profiling wafer edges post-slicing to prevent chipping in semiconductor handling. This assembly is a part of the machinery of heading 84.25, as it is used in wafer preparation equipment that performs lifting or hoisting functions. It ensures chip-free rounded edges for fab processing.
CMP Polisher Carrier Capstan
A capstan for chemical mechanical polishing carriers in wafer planarization. This product is a part suitable for use solely or principally with machinery of heading 84.25, specifically capstans used in CMP polishing equipment.
CMP Polisher Platen Assembly
A rotating platen that holds the polishing pad in chemical mechanical planarization (CMP) tools for wafers. This platen is a part of the machinery of heading 84.25, as it is an integral component of wafer polishers that use hoisting or lifting mechanisms. It ensures uniform pressure distribution for consistent polishing.
Crystal Boule Grinder Hoist Assembly
A hoist assembly integrated with crystal boule grinders to precisely shape semiconductor crystal boules to wafer diameters and add conductivity flats. This product is a part suitable for use solely or principally with machinery of heading 84.25, specifically hoists used in semiconductor manufacturing.
Crystal Grinder Spindle Assembly
A high-precision spindle with air bearings for rotating crystal boules during diameter grinding in semiconductor prep equipment. This spindle is a part of the machinery of heading 84.25, as it is used in grinders that incorporate hoisting or lifting functions. It maintains sub-micron runout for accurate flat positioning.