8207.19.30 - With cutting part containing by weight over 0.2 percent of chromium, molybdenum, or tungsten or over 0.1 percent of vanadium

This HTS category, 8207.19.30, encompasses interchangeable tools designed for rock drilling or earth boring, and their respective parts. The key defining characteristic for classification within this subcategory is the presence of a cutting part that contains, by weight, over 0.2 percent of chromium, molybdenum, or tungsten, or over 0.1 percent of vanadium. These specific alloying elements impart enhanced hardness, wear resistance, and durability to the cutting edges, making them suitable for demanding drilling applications.

Distinguishing this category from its sibling, 8207.19.60 (Other), relies on the precise chemical composition of the cutting elements. While 8207.19.60 would cover rock drilling and earth boring tools and parts that do not meet the specified elemental thresholds for chromium, molybdenum, tungsten, or vanadium, this current classification requires the presence of these alloys in the cutting portion. This distinction is crucial for accurately identifying tools designed for particularly abrasive or hard rock formations where advanced material properties are essential.

The subcategories under 8207.19.30 further refine the classification of these specialized drilling tools. The existence of a specific subheading for "Percussion rock drill bits" indicates that tools primarily designed for impact-driven drilling, such as those used in mining or construction, have their own designated classification. The "Other" subcategory would then capture any remaining rock drilling or earth boring tools and parts that meet the material composition criteria but do not fall under the percussion drill bit designation.