8460.31.00.40 - Used or rebuilt

This HTS classification, 8460.31.00.40, specifically addresses numerically controlled sharpening (tool or cutter grinding) machines. These are sophisticated machine tools designed for the precise grinding, sharpening, and reconditioning of metalworking tools and cutters. The key defining characteristic here is the integration of numerical control (NC) systems, which automate the grinding process through pre-programmed instructions, enabling high precision, repeatability, and complex tool geometry replication. Such machines are essential for maintaining the cutting efficiency and extending the lifespan of a wide variety of tools used in manufacturing.

The distinction between this category and its sibling, 8460.31.00.80 (Other), lies solely in the presence of numerical control. While both fall under sharpening machines, the "Used or rebuilt" designation at this specific level indicates that this particular sub-classification applies to NC sharpening machines that are not new. The "Other" sibling would encompass non-numerically controlled sharpening machines, regardless of their condition (new, used, or rebuilt), or numerically controlled sharpening machines that are new.

As this is a leaf node within the HTS structure, there are no further subcategories. Therefore, the classification terminates at the level of "Used or rebuilt numerically controlled sharpening (tool or cutter grinding) machines." Classification under this code would be determined by the machine's NC capability and its condition being other than new.