Dia-Pitch Ball Screw for Semiconductor Crystal Pullers from Japan
Dia-pitch ball screw providing ultra-smooth constant velocity motion for Czochralski crystal pullers growing silicon boules. Vibration-damped design per statistical notes, HTS 8483.40.80.00 classification.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Reference statistical note (a)(i) crystal growers in documentation for semiconductor context
• Document ultra-low friction coefficient (<0.003) and velocity uniformity specs
• Include contamination control measures (e.g
• PEEK nut material) for cleanroom use