8458.91.10.40 - Used or rebuilt

This HTS category, 8458.91.10.40, specifically covers used or rebuilt vertical turret lathes that are numerically controlled. These machines are designed for metalworking operations, particularly turning, facing, and boring, and are characterized by their vertical spindle orientation and the use of a turret to hold multiple cutting tools. The "used or rebuilt" designation is a crucial criterion, meaning these are pre-owned machines that have undergone refurbishment or repair.

Within the broader category of "Other lathes: Numerically controlled," this subcategory is distinct from any sibling categories by its specific machine type (vertical turret lathes) and their condition (used or rebuilt). While other numerically controlled lathes might exist, this classification focuses on a particular configuration and operational history, differentiating it from new machines or different lathe designs like horizontal or Swiss-type lathes.

As this is a leaf node, there are no further subcategories. Therefore, the focus for classification purposes under 8458.91.10.40 rests on confirming the machine's identity as a used or rebuilt numerically controlled vertical turret lathe. Importers and exporters should ensure that documentation accurately reflects these specific characteristics to ensure proper customs declaration and duty assessment.