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.
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 integral part of wafer grinding machine
Parts of semiconductor manufacturing machines are classified in 8419 if not separately identifiable as plain bearings.
If for precision measurement applications in testing equipment
If designed primarily for machine-tool alignment rather than load-bearing, it shifts to precision instruments in Chapter 90.
If configured with rolling elements
Adding balls or rollers changes it from plain shaft bearing to other flywheel/gear parts.
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Import Tips & Compliance
• Verify material composition (e.g
• bronze alloy specs) with mill test certificates to confirm classification as plain shaft bearing
• Include end-use documentation proving use in semiconductor processing to avoid reclassification as machinery parts
• Check for tolerances and certifications like ISO 9001, as precision affects duty and compliance
Related Products under HTS 8483.30.80.90
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.
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.