Crystal Boule Grinder Coolant Dispersion Ring from Japan
Annular jet ring that disperses coolant streams around grinding wheels for precise diameter control on semiconductor crystal boules. Falls under HTS 8424.90.90.40 for parts of powder/liquid projecting machines in wafer prep. Ensures uniform cooling to prevent thermal cracking during flat grinding.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Include grind wheel RPM and coolant PSI specs to demonstrate jet precision requirements
• Certify RoHS compliance early as semiconductor parts face strict contamination controls