Grinding or polishing machines
Machine-tools for working stone, ceramics, concrete, asbestos-cement or like mineral materials or for cold working glass. > Grinding or polishing machines
Duty Rate (from China)
Subheadings
Products classified under Tariff item 8464.20
Architectural Glass Corner Grinding Machine
A machine that grinds 45-degree mitred corners on large glass panels for frameless shower doors and facades. It is specifically for cold working glass, falling under this tariff item as a grinding machine for glass.
8464.20.00Asbestos-Cement Sheet Polisher
A wide-belt polishing machine designed to finish asbestos-cement roofing and siding sheets to a uniform thickness. It operates through abrasive belts that grind and polish the mineral-based material, falling under the tariff item for grinding or polishing machines for asbestos-cement or like mineral materials.
8464.20.00Automotive Windshield Polishing Machine
A specialized polisher that removes scratches and restores clarity on laminated automotive safety glass. It falls under this tariff item as a polishing machine for cold working glass, even in vehicle repair contexts.
8464.20.00Ceramic Substrate Grinder
A grinding machine for alumina or aluminum nitride ceramic substrates used in power electronics and LED packaging. This machine ensures substrate flatness for reliable electronic performance. It is classified under tariff item 8464.20.00 as a grinding machine for ceramics, a like mineral material.
8464.20.00Ceramic Tile Grinder
A bridge-style grinder used to rectify the edges and surfaces of ceramic tiles to precise dimensions after firing. This machine falls under the tariff item as it is specifically designed for grinding ceramic materials, a category explicitly listed under mineral materials.
8464.20.00CNC Glass Edge Grinding Machine
A CNC machine that grinds and polishes the edges of flat glass sheets to precise specifications for architectural and automotive applications. This machine falls under the tariff item as a grinding and polishing machine for glass.
8464.20.00CNC Granite Surface Grinder
A CNC machine designed for precision grinding of flat surfaces on granite slabs used in countertops and monuments. It falls under this tariff item as a grinding machine specifically for working stone, a mineral material.
8464.20.00Concrete Floor Grinder
A planetary head grinder used for leveling and smoothing concrete floors at construction sites. This machine is classified under the tariff item as it is a grinding machine for concrete, a material considered a 'like mineral material' in the chapter notes.
8464.20.00Concrete Wafer Polishing Machine
A high-precision polisher for engineered concrete wafer substrates used in advanced power modules. This machine is classified under tariff item 8464.20.00 as a polishing machine for concrete, a like mineral material. It provides an alternative substrate for SiC power semiconductors.
8464.20.00Crystal Boule Grinder
A precision grinding machine used to grind semiconductor crystal boules to exact diameters and flats indicating conductivity type and resistivity. This machine is essential for wafer manufacturing equipment. It is classified under tariff item 8464.20.00 as a grinding machine for mineral crystal materials.
8464.20.00Czochralski Crystal Grinder
A grinder specifically for Czochralski-grown silicon boules, preparing ingots for wafer production in the CZ process. This machine is classified under tariff item 8464.20.00 as a grinding machine for mineral crystal materials. It ensures precise diameters for subsequent wafer slicing.
8464.20.00Diamond Wire Glass Grinding Saw
A hybrid machine that uses diamond wire for grinding and polishing glass edges in solar panel production. Despite its saw-like appearance, it performs cold working of glass through grinding and polishing, placing it under this tariff item.
8464.20.00Flat Glass Surface Polishing Machine
An industrial polisher that uses abrasive pads to achieve a mirror-finish on float glass surfaces for mirrors and display cases. This machine is classified under the tariff item as a polishing machine for cold working glass.
8464.20.00Float Glass Continuous Polisher
A mass production polisher that processes continuous float glass ribbon post-tin bath. It falls under this tariff item as a polishing machine for inline cold working of glass in primary glassmaking.
8464.20.00Gallium Arsenide Wafer Polisher
A polishing machine for compound semiconductor wafers like gallium arsenide, bringing surfaces to a mirror finish required for device fabrication. This machine is classified under tariff item 8464.20.00 as a polishing machine for mineral crystal materials. It is essential for producing high-quality semiconductor wafers.
8464.20.00Glass Bottle Neck Polishing Machine
A high-speed polishing machine designed to smooth and finish the necks of glass bottles used in beverage packaging lines. It operates through cold working processes after the bottles are formed, ensuring smooth, contamination-free surfaces for food-grade applications. This machine falls under tariff item 8464.20.00 as a grinding or polishing machine for cold working glass.
8464.20.00Glass Edge Polisher
A straight-line machine for bevelling and polishing the edges of flat glass sheets used in windows and mirrors. This machine falls under the tariff item as it performs cold working of glass through polishing processes.
8464.20.00Glass Lens Grinding and Polishing Machine
A precision machine used for grinding and polishing ophthalmic and camera glass lenses to exact curvatures. This cold working process is essential for achieving the precise optical properties required for vision correction and imaging. It is classified under tariff item 8464.20.00 as a grinding or polishing machine for cold working glass.
8464.20.00Glass Lens Grinding Machine for Fiber Optics
This is a precision grinding machine for cold working glass lenses used in fiber optic transceivers. It shapes and polishes glass to create microlenses for VCSEL coupling in data center optics. It falls under this tariff item as a machine-tool for cold working glass.
8464.20.00Glass Tabletop Beveling Machine
A straight-line beveling machine that creates decorative angled edges on glass tabletops and shelves. This dedicated cold grinding and polishing machine is used in furniture glass production to achieve precise, smooth edges. It falls under tariff item 8464.20.00 as a grinding or polishing machine for cold working glass.
8464.20.00Handheld Glass Polishing Tool
A portable pneumatic polisher designed for on-site restoration of glass surfaces such as storefront windows. Although manually guided, it is classified under tariff item 8464.20.00 as a glass-specific cold polishing mechanism. It is built for industrial-strength polishing tasks in commercial settings.
8464.20.00Insulated Glass Unit Edge Grinder
An edge grinder for insulated glass units that grinds the edges of dual-pane glass panels to prepare them for window sealing. This cold process ensures compatibility with spacers and sealants, contributing to energy-efficient building standards. It is classified under tariff item 8464.20.00 as a grinding machine for cold working glass.
8464.20.00LCD Display Glass Polishing Line
An automated continuous polishing line for thin glass substrates used in LCD and OLED flat panel displays. This specialized cold working machine ensures defect-free surfaces through multiple polishing stations. It is classified under tariff item 8464.20.00 as a polishing machine for cold working glass in electronics manufacturing.
8464.20.00Marble Slab Polishing Machine
An automated polishing line for creating high-gloss finishes on marble slabs for flooring and wall tiles. This machine is classified under the tariff item as a polishing machine dedicated to stone, specifically marble, a mineral material.
8464.20.00Mirror Silvering Pre-Polisher
A polishing machine that prepares glass substrates for vacuum silvering in mirror production. Surface perfection is critical before metallization to achieve high reflectivity. It is classified under tariff item 8464.20.00 as a polishing machine for cold working glass.
8464.20.00Porcelain Edge Grinding Machine
A CNC-controlled grinder for chamfering and smoothing porcelain slab edges for high-end bathroom vanities. This machine falls under the tariff item as it is a grinding machine for ceramics, a mineral material.
8464.20.00Quartz Glass Tube Polishing Machine
A centerless polishing machine that finishes the outer diameter of quartz glass tubes used in lighting and laboratory applications. This cold working process maintains the thermal properties of the quartz. It is classified under tariff item 8464.20.00 as a polishing machine for cold working specialty glass.
8464.20.00Quartz Wafer Lapping Machine
A double-sided lapping machine for achieving flatness tolerances on quartz crystal wafers used in oscillators. Quartz is a stone, so this machine falls under the tariff item as a grinding or polishing machine for stone.
8464.20.00Sapphire Wafer Grinder
This is a precision grinder for synthetic sapphire wafers used in LED epitaxy and RF devices. It grinds sapphire, a hard mineral material (corundum), to optical tolerances. It is classified here as a machine-tool for working mineral materials.
8464.20.00Semiconductor Glass Wafer Grinder
A precision grinder that prepares quartz and borosilicate glass wafers for semiconductor masking and testing. This high-tech application of glass cold working achieves sub-micron tolerances. It is classified under tariff item 8464.20.00 as a grinding machine for cold working glass.
8464.20.00Shower Door Glass Edger
A pencil and flat edger for tempered glass shower enclosure panels. This glass-specific cold working machine rounds edges for safety and aesthetic purposes. It is classified under tariff item 8464.20.00 as a grinding or polishing machine for cold working glass.
8464.20.00Silicon Carbide Wafer Lapper
This is a lapping machine for silicon carbide (SiC) wafers used in power semiconductors. It achieves sub-micron flatness for epitaxial growth, working on SiC, a ceramic mineral material. It is classified here as a grinding or polishing machine for mineral materials.
8464.20.00Silicon Wafer Lapping Machine
This is a lapping machine for silicon wafers that achieves ultra-flat surfaces within tight dimensional tolerances before fabrication. It works on silicon, a mineral material, and is used in wafer preparation. It is classified here as a grinding or polishing machine for mineral materials.
8464.20.00Stone Crystal boule Grinder
A precision grinder for semiconductor crystal boules like quartz or sapphire to exact diameters before wafer slicing. This machine falls under the tariff item as it is a grinding machine for stone or mineral materials.