8460.12.00 - Numerically controlled

This category encompasses numerically controlled (NC) flat-surface grinding machines designed for finishing metal or cermets. These machines utilize grinding stones, abrasives, or polishing products to achieve a precisely flat surface on workpieces. The "numerically controlled" designation signifies that the machine's operations, including grinding path, speed, and pressure, are guided by programmed numerical data, allowing for high precision and repeatability in the finishing process.

This specific NC subcategory is distinct from its sibling, 8460.19.01, which covers "Other" flat-surface grinding machines that are not numerically controlled. Therefore, the key differentiating factor is the presence of automated, program-driven control systems in the 8460.12.00 classification. This enables complex grinding operations and tight tolerances that would be difficult or impossible to achieve with manual controls.

Within this numerically controlled flat-surface grinding machine category, further subdivisions exist to distinguish between machines based on their condition. The subcategory 8460.12.00.40 specifically covers used or rebuilt machines, implying they have a prior operational history. Conversely, 8460.12.00.80 encompasses all other numerically controlled flat-surface grinding machines that do not fall under the "used or rebuilt" designation, typically referring to new or remanufactured units.