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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as loose ceramic components not specifically for bearings
General ceramic articles without bearing function classify under Chapter 69.
If under 1/4 inch in diameter
Smaller ceramic balls have specific subheading under bearing balls.
If integral to insulating semiconductor processing parts
Ceramic-electrical insulator combinations for semiconductor equipment may fall under Chapter 85.
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Import Tips & Compliance
• Include ceramic material purity certificates (>99% Si3N4) for duty verification; comply with REACH for non-steel materials; segregate from metallic balls to prevent contamination
Related Products 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.
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.