Czochralski Crystal Puller Spare Gearbox
This precision gearbox is a replacement part for Czochralski crystal pullers used in semiconductor wafer manufacturing to grow monocrystalline silicon boules. It falls under tariff item 8475.90.00 as a part of machines for manufacturing or hot working glass or glassware, which includes crystal growing equipment.
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 |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the gearbox is not identifiable as a part of a crystal puller
Gears and gearing, including gearboxes, are classified under heading 84.83 when presented separately and not as parts of a specific machine.
If the gearbox is part of a machine not specifically covered elsewhere
Machines having individual functions, not specified elsewhere in Chapter 84, are classified under heading 84.79.
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 the gearbox as a part of crystal growing machines under 8475.90.00, not as a general gearbox under heading 84.83
• Provide CBSA with the make and model of the crystal puller it is intended for to support the classification
• If the gearbox is imported with other components, ensure it is not part of a complete machine, which would change the tariff classification
Related Products under Tariff item 8475.90.00
Anode Support Fixture for CRT Tubes
Anode support fixture designed to hold and position anodes inside glass envelopes during cathode ray tube assembly. It maintains critical spacing for electron flow, ensuring proper tube function. This fixture is a dedicated part of machines for assembling electric tubes in glass envelopes.
Base Cementing Applicator Nozzle
Precision nozzle for applying adhesive cement to attach metal bases to glass envelope lamps. It is a component of assembly machines that ensures secure, vibration-resistant bonding. This nozzle is specifically designed for lamp assembly machinery.
Crystal Boule Grinder Spindle Assembly
This rotating spindle assembly is a replacement part for crystal grinders that shape semiconductor boules to precise wafer diameters and flats. It is classified under tariff item 8475.90.00 as a part of machines for manufacturing or hot working glass or glassware, which includes equipment for preparing semiconductor wafers.
Electrode Press Assembly for Vacuum Tubes
Hydraulic press assembly for sealing electrodes into glass envelopes of vacuum tubes during assembly. It applies controlled pressure to create hermetic seals, essential for tube integrity. This is a core part of tube manufacturing machines.
Exhaust Manifold for Lamp Evacuation Systems
Multi-port manifold distributing vacuum to multiple glass envelopes in batch lamp assembly. It optimizes throughput in high-volume production by evacuating several envelopes simultaneously. This manifold is a part of evacuation machines for lamp manufacturing.
Exhaust Tube Crimping Tool Assembly
Automated crimping tool for sealing exhaust tubes on glass envelope flashbulbs after gas evacuation. It is critical for maintaining internal pressure and ensuring flashbulb reliability. This tool is a dedicated part of flashbulb assembly machines.