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Ball or roller bearings, and parts thereof: > Parts: > Balls, needles and rollers > Other
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 8482.91.00.90
Grade 5 Silicon Steel Bearing Balls
Grade 5 precision silicon-alloyed steel balls for bearings in Czochralski crystal puller rotation mechanisms. Critical for maintaining boule uniformity during semiconductor crystal growth. HTS 8482.91.0090 as other bearing balls.
Precision Chrome Steel Bearing Balls
High-precision chrome steel balls used as rolling elements in ball bearings for semiconductor wafer grinders and polishers. These balls ensure smooth rotation and minimal friction during the grinding process to achieve flatness tolerances on semiconductor wafers. Classified under 8482.91.0090 as 'other' balls for bearing parts, distinct from needles or standard rollers.
Ceramic Silicon Nitride Bearing Balls
Non-corrodible silicon nitride ceramic balls for high-speed bearings in crystal grinders used in semiconductor boule preparation. These balls provide superior wear resistance and low thermal expansion for precise diameter grinding. Falls under HTS 8482.91.0090 as 'other' bearing balls.
Tungsten Carbide Bearing Rollers
Small tungsten carbide cylindrical rollers for precision roller bearings in wafer slicing saw spindles. These provide extreme hardness for high-speed cutting of monocrystalline semiconductor boules. Classified as 'other' rollers under 8482.91.0090 for bearing parts.
Miniature Needle Rollers for Wafer Polishers
Thin miniature needle rollers (under 1.0mm diameter) for ultra-precision bearings in semiconductor wafer polishers. Enable nanometer-level surface flatness preparation for fabrication. Though needles, classified under 'other' 8482.91.0090 when not matching specific needle provisions.
Hybrid Ceramic-Steel Bearing Balls
Hybrid balls with ceramic core and thin steel coating for bearings in float zone crystal growers. Combine ceramic purity with steel durability for semiconductor processing. HTS 8482.91.0090 as other bearing balls.
Polished Stainless Steel Bearing Rollers
Electropolished 440C stainless steel rollers for corrosion-resistant bearings in wafer lapping equipment. Maintain surface finish during wet semiconductor processing. Classified 8482.91.0090 as other rollers.
Grade 3 Tungsten Carbide Balls
Ultra-precision Grade 3 tungsten carbide balls (0.08μm sphericity) for bearings in high-RPM wafer slicing saws. Essential for maintaining cut parallelism in semiconductor wafers. HTS 8482.91.0090 other balls.
Silicon Carbide Bearing Rollers
Reaction-bonded silicon carbide rollers for thermal-resistant bearings in hot-zone crystal growers. Withstand 1400°C processing temperatures for semiconductor boules. 8482.91.0090 as other rollers.
Micro-Precision Needle Rollers
0.8mm diameter micro-needles for miniature bearings in automated wafer grinders. Enable precise orbital motion for semiconductor wafer diameter control. HTS 8482.91.0090 other needles/rollers.
Hardened AISI 52100 Chrome Steel Balls
Through-hardened AISI 52100 chrome steel balls (Rc 62-66) for main spindle bearings in crystal boule grinders. Standard for semiconductor equipment precision bearings. Classified 8482.91.0090.
Zirconia Ceramic Bearing Balls
Yttria-stabilized zirconia (YTZP) balls for chemically-resistant bearings in wafer preparation chemical-mechanical polishers. High fracture toughness for semiconductor processing. HTS 8482.91.0090.
Cylindrical Bearing Rollers for Pullers
High-length-to-diameter ratio cylindrical rollers for axial bearings in Czochralski puller mechanisms. Support heavy crystal growth loads in semiconductor manufacturing. 8482.91.0090 other rollers.
TiN Coated Bearing Balls
PVD titanium nitride coated chrome steel balls for low-friction bearings in high-vacuum wafer grinders. Gold-color coating reduces wear in semiconductor cleanrooms. HTS 8482.91.0090.
Super-Precision Needle Rollers
ISO Grade II super-precision needle rollers for air-bearing spindles in wafer flat grinders. Achieve sub-micron diameter tolerances for semiconductor wafers. Classified 8482.91.0090 other.