Graphite Plain Shaft Bearing for Crystal Puller
A self-lubricating graphite plain shaft bearing without housing, used in Czochralski crystal pullers to support rotating shafts during monocrystalline silicon boule growth for semiconductor wafers. Classified under HTS 8483.30.8090 for its role as a plain shaft bearing in high-temperature semiconductor processing equipment.
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 replacement part for semiconductor machinery
Machines/parts for semiconductor manufacture have specific provisions in 8486.
If predominantly of carbon/graphite without machined bearing features
Unmachined graphite articles fall under Chapter 68 for other articles of stone/graphite.
If high-temperature refractory graphite form
Refractory ceramics including graphite shift to Chapter 69 if not primarily a bearing.
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Import Tips & Compliance
• Provide thermal tolerance specs and end-use statements for semiconductor crystal growth to support plain bearing classification
• Ensure no housing attachment; loose import risks reclassification as housed bearings under 8483.30.30
• Declare graphite purity levels to avoid chemical product headings in Chapter 38
Related Products under HTS 8483.30.80.90
Bronze Bushing for Semiconductor Wafer Grinder
A precision bronze plain shaft bearing without housing, designed for high-speed rotation in wafer grinding machines used to shape semiconductor crystal boules to exact diameters. It falls under HTS 8483.30.8090 as a plain shaft bearing without housing, essential for maintaining alignment and reducing friction in semiconductor manufacturing equipment.
PTFE-Lined Bushing for Wafer Slicing Saw Spindle
A low-friction PTFE-lined steel plain shaft bearing without housing, fitted on spindles of wafer slicing saws that cut monocrystalline semiconductor boules into thin wafers. It qualifies for HTS 8483.30.8090 as an unlubricated plain shaft bearing optimized for cleanroom semiconductor fabrication.
Ceramic Plain Bearing for Wafer Polisher
A high-precision silicon carbide ceramic plain shaft bearing without housing, used in wafer polishers to achieve flatness tolerances critical for semiconductor device fabrication. Under HTS 8483.30.8090 as a plain shaft bearing for semiconductor wafer preparation equipment.
Oil-Impregnated Sintered Bronze Bushing for Float Zone Crystal Grower
Self-lubricating oil-impregnated sintered bronze plain shaft bearing without housing, supporting shafts in float zone crystal growers for pure semiconductor material production. Classified in HTS 8483.30.8090 for plain shaft bearings in specialized semiconductor equipment.
Stainless Steel Sleeve Bearing for Wafer Lapping Machine
Corrosion-resistant 316 stainless steel sleeve-type plain shaft bearing without housing, used in wafer lappers to prepare semiconductor wafers to dimensional tolerances. HTS 8483.30.8090 covers this as a plain shaft bearing for semiconductor processing.
Polymer Composite Plain Bearing for Crystal Grinder
High-load polymer composite (POM/PTFE blend) plain shaft bearing without housing for crystal grinders that shape semiconductor boules with conductivity flats. Falls under HTS 8483.30.8090 as a plain shaft bearing designed for precision semiconductor applications.