Crystal Grinder Spindle Assembly from Mexico
High-precision spindle with air bearings for rotating crystal boules during diameter grinding in semiconductor prep equipment. Fits 8431.10.0090 as part of 8425 grinders. Maintains sub-micron runout for accurate flat positioning.
Duty Rate — Mexico → United States
25%
Rate breakdown
9903.94.0525%Except for products described in headings 9903.94.06, 9903.94.32, 9903.94.33, 9903.94.42, 9903.94.43, 9903.94.44, 9903.94.45, 9903.94.52, 9903.94.53, 9903.94.54, 9903.94.55, 9903.94.62, 9903.94.63, 9903.94.66 and 9903.94.67, automobile parts, as provided for in subdivision (g) of U.S. note 33 to this subchapter
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
9903.74.100%Articles as provided for in subdivision (k) of U.S. note 38 to this subchapter
9903.74.110%Articles as provided for in subdivision (l) of U.S. note 38 to this subchapter.
Import Tips
• Specify RPM and runout tolerances (<0.1 micron); provide assembly diagrams
• Common issue: undervaluation as generic motor under 8501