Wafer Lapper Planetary Gear Ring
Hardened steel internal gear ring attachment for planetary wafer lappers (8429) that drives multiple wafer carriers simultaneously across lapping plate for uniform semiconductor wafer thinning. 8431.49.9020.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If machined gears not specific to lapping machinery
Transmission gears default to 8483 unless dedicated parts.
If for use with heading 8425 pumps rather than 8429
Parts specificity to machinery heading determines subheading.
If lapper/grinder parts generically
Surface grinding machine parts alternative.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Gear pitch/module and carrier count specs prove lapping machine fit
• Nitrided surface hardness (Rc 60+) indicates semiconductor durability
• Generic gears classify under 8483.90
Related Products under HTS 8431.49.90.20
Float Zone Crystal Grower RF Coil
A radiofrequency induction coil attachment for float zone crystal growers (heading 8429 machinery) used to melt and purify silicon rods into monocrystalline boules for wafers. It mounts directly on the grower apparatus to create the molten zone. Classified under 8431.49.9020 as an other attachment for semiconductor processing machinery.
Semiconductor Wafer Edge Grinder Spindle
High-precision spindle attachment that mounts on wafer edge grinders (8429 machinery) to rotate and bevel wafer edges post-slicing for handling safety and yield improvement in semiconductor processing. Classified 8431.49.9020.
Crystal Puller Seed Holder Clip Assembly
Quartz or molybdenum clip assembly that mounts seed crystals in Czochralski pullers (8429) to initiate monocrystalline growth from molten silicon. Withstands 1400°C vacuum conditions. 8431.49.9020 attachment.
Wafer Grinder Coolant Nozzle Manifold
Stainless steel manifold attachment with multiple nozzles that mounts on wafer grinders/lappers (8429) to deliver deionized water coolant precisely during semiconductor wafer surface preparation. 8431.49.9020.
Boule Flattener Diamond Dresser Holder
Carbide holder attachment for mounting industrial diamond dressers on crystal boule flattener/grinders (8429 machinery) to create precise conductivity flats on semiconductor ingots. Ensures orientation accuracy. 8431.49.9020.
Wafer Polishing Head Vacuum Chuck
Porous ceramic vacuum chuck that mounts on polishing heads of wafer polishers (8429) to hold semiconductor wafers flat during final CMP preparation for device fabrication. Critical for nanometer flatness. 8431.49.9020.