Precision NC Internal Grinder for Crystal Puller Bearings from United States
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.
Duty Rate — United States → Canada
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Import Tips
• 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