Dia-Pitch Ball Screw for Semiconductor Crystal Pullers
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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If part of complete crystal growing furnace system
Semiconductor manufacturing machines including crystal pullers classified in 8486.
If high-temperature version (>400°C) for furnace environments
Parts of industrial furnaces including semiconductor processing ovens in 8419.
If with integrated position encoders for pull rate measurement
Measuring instruments for crystal growth monitoring go to Chapter 90.
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Import Tips & Compliance
• 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
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