Crushing or grinding machines
Machinery for sorting, screening, separating, washing, crushing, grinding, mixing or kneading earth, stone, ores or other mineral substances, in solid (including powder or paste) form; machinery for agglomerating, shaping or moulding solid mineral fuels, ceramic paste, unhardened cements, plastering materials or other mineral products in powder or paste form; machines for forming foundry moulds of sand. > Crushing or grinding machines
Duty Rate (from China)
Subheadings
Products classified under Tariff item 8474.20
boule Crystal Diameter Grinder
An automated grinder designed to shape semiconductor boules to uniform diameter specifications, ensuring consistent wafer yield. It processes solid mineral substances such as silicon crystals, which falls under the scope of crushing or grinding machines for mineral materials.
8474.20.00Crystal Ingot Slicing Pre-Grinder
A pre-grinding machine that prepares silicon ingots before multi-wire saw slicing into wafers. It ensures uniform slicing and higher wafer quality by grinding the solid mineral ingot, fitting the definition of a grinding machine for mineral substances.
8474.20.00Czochralski Crystal Puller Grinder
A precision grinding machine used to grind semiconductor crystal boules produced by the Czochralski method to exact diameters for wafer slicing. It processes solid mineral substances, qualifying as a grinding machine under this tariff item.
8474.20.00Diamond Wafer Grinding Machine
A high-precision grinder using diamond abrasives for initial silicon wafer backgrinding, reducing wafer thickness from 700μm to less than 100μm. It grinds solid mineral wafers, fitting the scope of grinding machines for mineral substances.
8474.20.00Float Zone Crystal Boule Grinder
A grinding apparatus for float zone monocrystalline semiconductor boules, creating precise flats indicating resistivity. It grinds solid mineral substances, qualifying as a grinding machine under this tariff item.
8474.20.00Gallium Arsenide Crystal Grinder
A specialized grinder for gallium arsenide compound semiconductor boules, grinding to precise diameters and flats. It processes solid mineral substances, fitting the definition of a grinding machine for minerals.
8474.20.00Handheld Portable Ore Grinder
A battery-powered handheld grinder for small-scale mineral ore sample crushing in field geology. It is a portable grinding machine for solid minerals, fitting the scope of this tariff item.
8474.20.00Portable Ball Mill for Ore Grinding
A compact, trailer-mounted ball mill for fine grinding of mineral ores into powder for mining operations. It is a portable grinding machine for solid minerals, qualifying under this tariff item.
8474.20.00Portable Diesel Hammer Mill Grinder
A towable hammer mill powered by diesel for grinding ores, minerals, and grain into powder form on-site. It qualifies as portable grinding machinery for solid mineral substances, though it also handles grain.
8474.20.00Portable Jaw Rock Crusher
A truck-mounted jaw crusher designed for on-site crushing of rocks and gravel into smaller aggregates. It is a portable crushing machine for solid mineral substances, fitting this tariff item.
8474.20.00Semiconductor Wafer Edge Grinder
An edge grinding machine that chamfers and shapes wafer peripheries to prevent chipping during handling. It grinds semiconductor wafers as solid mineral products, improving wafer strength and handling in fabrication.
8474.20.00Silicon Wafer Preparation Lapper
A lapping machine that grinds silicon wafers to tight flatness tolerances before fabrication processing. It is critical for achieving precise wafer surfaces, qualifying as a grinding machine for solid mineral substances.
8474.20.00Skid-Steer Rock Pulverizer Attachment
A portable pulverizer drum attachment for skid-steer loaders to crush rock and soil in construction. It is a portable crushing machine for mineral substances, qualifying under this tariff item.
8474.20.00Track-Mounted Impact Crusher
A mobile impact crusher on crawler tracks for crushing ores, concrete, and asphalt rubble at remote sites. It is a portable crushing machine for solid mineral substances, fitting this tariff item.
8474.20.00Wheel-Mounted Cone Crusher
A portable cone crusher on pneumatic wheels for secondary crushing of quarried stone and ores. It is a mobile crushing machine for solid mineral substances, qualifying under this tariff item.