8483.90.50 - Parts of gearing, gear boxes and other speed changers

This HTS category, 8483.90.50, encompasses a broad range of parts specifically designed for gearing, gear boxes, and other speed-changing mechanisms. This includes components like gears themselves, as well as parts of torque converters and universal joints that are not covered by more specific headings. The classification is reserved for these component parts when they are presented separately from the complete assembly and do not fall under more granular subheadings.

Distinguishing this category from its siblings, 8483.90.10 specifically covers chain sprockets and their associated parts. Additionally, other sibling categories are dedicated to parts of bearing housings and plain shaft bearings. Therefore, 8483.90.50 focuses exclusively on the components of gearing and speed-changing devices, excluding chain sprockets and bearing-related parts.

Within this category, further subclassification exists to refine the scope. The subheadings 8483.90.50.10, 8483.90.50.20, and 8483.90.50.80 differentiate based on specific applications and general residual "other" classifications. Forged gear blanks are categorized separately, as are parts of gear boxes and speed changers specifically designed for wind turbine applications. Finally, the residual subheading "Other" captures all remaining parts of gearing, gear boxes, and other speed changers that do not fit into the more specific subcategories.