Precision NC Internal Grinder for Crystal Puller Bearings
A precision numerically controlled internal grinding machine specifically designed for finishing the internal diameters of bearings used in Czochralski crystal pullers, which grow monocrystalline silicon boules for semiconductor wafers. It operates with abrasive wheels to achieve the tight tolerances required for these specialized bearings. This machine falls under tariff item 8460.23.00 as a numerically controlled cylindrical grinding machine for metal finishing.
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 grinder is not numerically controlled
Non-NC internal grinding machines fall under this alternative subheading.
If importing tool holders or work holders separately
Accessories for machine tools are classified under heading 84.66.
If importing finished bearings separately
Bearings and their parts are classified in Chapter 84, heading 84.82.
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 grinder is declared as a complete machine with its numerical control unit; separate components may be classified differently
• Verify if the grinder qualifies for duty relief under the Machinery Remission Program if used in manufacturing
• Have technical documentation ready to prove its principal function as a cylindrical grinder
Related Products under Tariff item 8460.23.00
Chevalier FSG-1224ADIV CNC Cylindrical Grinder
The Chevalier FSG-1224ADIV is a numerically controlled universal cylindrical grinder equipped with separate internal and external grinding wheels, enabling versatile finishing of cylindrical metal parts. It is designed for job shops handling diverse workpieces, making it suitable for precision grinding operations under tariff item 8460.23.00.
Danobat HG Universal CNC Cylindrical Grinder
The Danobat HG series is a numerically controlled cylindrical grinder built for heavy-duty grinding of large metal components such as railway axles and wind turbine parts. Its high-power spindles and rigid construction make it ideal for efficient finishing of metal alloys, qualifying it under tariff item 8460.23.00.
DMG Mori NLX 2500 Cylindrical Grinder
A DMG Mori NLX 2500 high-precision numerically controlled external cylindrical grinder for automotive crankshafts and transmission shafts. It uses diamond and CBN grinding wheels for finishing hardened steel components, qualifying under tariff item 8460.23.00.
Haas TL-1 CNC Toolroom Cylindrical Grinder
The Haas TL-1 is a numerically controlled cylindrical grinding machine designed for precision finishing of cylindrical metal parts such as shafts and bearings. It features automatic wheel dressing and high-speed spindles, making it suitable for a range of metalworking applications under tariff item 8460.23.00.
Haas TL-1 CNC Universal Cylindrical Grinder
A Haas TL-1 CNC universal cylindrical grinding machine designed for precision finishing of cylindrical metal shafts and components using abrasive wheels. It is classified under tariff item 8460.23.00 as a numerically controlled cylindrical grinder.
High-Precision NC Grinder for Wafer Grinder Spindle Housings
A high-precision numerically controlled internal cylindrical grinder for finishing spindle housings in wafer grinding machines that prepare semiconductor wafers. It falls under tariff item 8460.23.00 as an NC cylindrical grinder for precision metal finishing.