9031.49.40.00 - Coordinate-measuring machines

HTS Code 9031.49.40.00 specifically covers coordinate-measuring machines (CMMs). These are sophisticated instruments designed for precise measurement of the physical characteristics of an object. CMMs typically utilize a touch-trigger probe attached to a moving axis system to scan the surface of a workpiece, capturing discrete points. The machine's software then processes these collected data points to determine dimensions, tolerances, and geometric relationships, allowing for detailed dimensional analysis and quality control.

This classification distinguishes coordinate-measuring machines from other optical instruments and appliances under 9031.49 by their primary measuring mechanism. For instance, sibling category 9031.49.10.00 covers profile projectors, which rely on optical projection to magnify and compare a workpiece's silhouette against a template. While both can be used for inspection, CMMs are fundamentally measuring devices that collect and process coordinate data, rather than simply projecting an image for visual comparison. Similarly, 9031.49.70.00 pertains to specialized optical instruments for semiconductor inspection, and 9031.49.90.00 encompasses any remaining optical instruments not otherwise specified, highlighting the specific functionality of CMMs.

As a leaf node, HTS Code 9031.49.40.00 does not have further subdivisions. Therefore, its coverage is definitive for all coordinate-measuring machines, regardless of their specific configuration (e.g., bridge type, gantry type, horizontal arm) or the technology employed in their probing system, provided they operate on the principle of coordinate measurement. This ensures a clear and consistent classification for these critical metrology tools.