Optical Comparator Worktable Clamp Set
Precision machined clamps and holders for securing workpieces on the stage of optical comparators (9031.80.40). These allow stable positioning for accurate profile and dimension projection measurements. Classified under 9031.90.70.00 as accessories principally used with these specific inspection projectors.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If suitable for multiple machine tools
Universal workholding clamps for machine tools fall under heading 8466 fittings.
If basic steel clamps without optical comparator specifications
Plain metal articles of general use classify by material under Chapter 73.
If parts for other measuring machines outside 9031.80.40
Accessories principally for different inspection equipment use general parts heading.
Not sure which classification is right?
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Import Tips & Compliance
• Provide engineering drawings showing compatibility only with 9031.80.40 projectors to prevent general fixture classification
• Label shipments clearly as 'profile projector accessories' with model cross-references
• Avoid importing with universal machine vises, which could classify under 8466 tool-holding appliances
Related Products under HTS 9031.90.70.00
Shadowgraph Screen Calibration Reticle
Precision etched glass reticle mounted on the projection screen of shadowgraphs (profile projectors under 9031.80.40) for scale calibration and accuracy verification. Essential for maintaining measurement traceability in metrology labs. Classified as a part under HTS 9031.90.70.00.
Profile Projector Protractor Screen Attachment
Angular measurement protractor overlay that attaches to profile projector screens for direct angle readings from magnified projections. Specifically engineered for 9031.80.40 shadowgraph screens. Falls under HTS 9031.90.70.00 as a dedicated accessory.
Comparator Stage Precision Leveling Screws
Micrometer-adjustable leveling screws for optical comparator workstages, providing sub-micron height adjustments for perfect part alignment. Exclusive to 9031.80.40 profile projectors. Classified under 9031.90.70.00 machine parts.
Profile Projector Dust Cover and Storage Case
Custom-fitted protective cover and transit case designed specifically for profile projectors of 9031.80.40, with foam cutouts for optics and stage protection. Prevents contamination of precision optical surfaces. Classifies as accessory under HTS 9031.90.70.00.
Shadowgraph Objective Lens Cleaning Kit
Specialized cleaning kit with lint-free wipes, precision swabs, and optical cleaning solution formulated for shadowgraph objective lenses in 9031.80.40 profile projectors. Prevents scratches on high-magnification optics. Dedicated accessory under 9031.90.70.00.
Profile Projector USB Data Output Cable
Custom-length USB interface cable with proprietary connectors for digital profile projectors (9031.80.40) to connect with PC-based measurement software. Enables digital dimension export and SPC data collection. Classifies as dedicated accessory under 9031.90.70.00.