Precision CNC Wafer Backside Grinder
This numerically controlled grinder thins semiconductor wafers from the backside to a target thickness (typically 50-775 microns) using diamond abrasives on metal or cermet surfaces. It is a machine-tool for finishing metal or cermets by grinding, within the scope of heading 84.60. The numerical control feature qualifies it for tariff item 8460.24.00.
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
This covers other grinding machines without numerical control, which may apply if the control system is not automated.
If the grinder is used solely or principally for semiconductor wafer thinning
Chapter note 11 (D) classifies machines for semiconductor manufacture in heading 84.86, which takes precedence over 84.60.
If the machine also performs polishing or other finishing operations
This item covers other finishing machines in heading 84.60, including polishing, if the primary function is not exclusively grinding.
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
• Declare the grinder as a numerically controlled machine-tool for finishing metal or cermets, and provide the CNC model and software version to the CBSA
• Ensure the machine's end-use is clearly stated; if it is solely for semiconductor manufacturing, heading 84.86 may apply instead
• Consider applying for a tariff classification ruling from the CBSA to confirm the correct item before shipping
Related Products under Tariff item 8460.24.00
CNC Belt Grinding Machine
A CNC belt grinding machine uses an abrasive belt under numerical control to finish contoured metal surfaces such as aerospace forgings, ensuring consistent material removal. It falls under tariff item 8460.24.00 as a numerically controlled grinding machine for metal, not involving gear cutting.
CNC Camshaft Grinding Machine
A CNC camshaft grinding machine is a numerically controlled grinder for camshaft lobes and journals, achieving precise profiles via abrasive wheels. It qualifies under tariff item 8460.24.00 as an other numerically controlled grinding machine for metal, excluding gear grinding.
CNC Centerless Grinding Machine
A CNC centerless grinding machine is numerically controlled and removes material from cylindrical metal parts using abrasive wheels to achieve precise diameters and finishes. It falls under tariff item 8460.24.00 as an other numerically controlled grinding machine for metal.
CNC Crankshaft Grinding Machine
A CNC crankshaft grinding machine is a numerically controlled grinder for engine crankshaft journals and pins, ensuring balance and diameter precision via abrasives. It falls under tariff item 8460.24.00 as an other numerically controlled grinding machine for metal, not gear-related.
CNC Creep Feed Grinding Machine
A CNC creep feed grinding machine uses slow feed rates and high stock removal under numerical control for deep slots in turbine blades and aerospace parts. It qualifies under tariff item 8460.24.00 as a numerically controlled grinding machine for metal, excluding gear grinding.
CNC Cylindrical Grinding Machine
A CNC cylindrical grinding machine performs external and internal grinding of cylindrical metal components like bearings and pistons using abrasive wheels for high-precision finishing. It matches tariff item 8460.24.00 as an other numerically controlled grinding machine for metal.