Fiber preparation machines — such as openers, cards, and combers — process raw or semi-processed fiber into a form ready for spinning, whereas spinning machines draw and twist that prepared fiber into yarn. The functional boundary matters for tariff classification: equipment that stops short of actual yarn formation generally falls under fiber preparation headings, while machines that produce yarn fall under spinning headings.

Depending on the country of origin, certain textile machinery imports may be subject to Section 301 tariffs or antidumping/countervailing duty orders. Importers should verify the applicable measures for the specific origin before finalizing sourcing decisions, as these measures can significantly affect landed cost.