Precision-ground rolls imported as replacement components for existing calendering machines are classified as parts under this heading, not as machinery. The key is that they are presented as components designed for a specific parent machine rather than as standalone processing equipment. Importers should include documentation identifying the parent machine model and confirming the rolls' purpose as replacement parts to support this classification.

Generally no — the material composition of the roll does not change its classification as a part for a calendering or rolling machine, provided it is identifiable as a component for such equipment. Steel-core rolls, rubber-covered rolls, and composite rolls used in textile, paper, or rubber calendering are all captured here. However, if a rubber-covered roll is presented in a context suggesting it is a general industrial roller rather than a calender-specific part, classification officers may request additional documentation on its intended use.