3926.90.60.10 - Synchronous belts

This HTS classification, 3926.90.60.10, specifically designates synchronous belts manufactured from plastics. Synchronous belts, often referred to as timing belts, are characterized by their toothed design that engages with sprockets or pulleys, ensuring precise and synchronized motion transfer. They are commonly employed in a wide range of machinery for applications requiring accurate timing, such as in automotive engines, 3D printers, and conveyor systems. The material composition being primarily plastic is a key determinant for classification under this heading.

Within the broader category of "Other articles of plastics and articles of other materials of headings 3901 to 3914," and more specifically under "Other belting and belts, for machinery," this subcategory distinguishes itself from its sibling, 3926.90.60.90, which covers all other types of belting and belts for machinery not specifically identified as synchronous belts. Therefore, if a belt does not possess the characteristic toothed design for synchronized movement, it would fall under the "Other" sibling category.

As a leaf node, this classification does not have further subdivisions. Classification at this level relies on the explicit identification of the item as a synchronous belt and its construction from plastic materials. Examples of items classified here include toothed V-belts made of polyurethane or rubber-reinforced plastics designed for positive engagement with pulleys. The focus is on the functional design for synchronization and the primary material of manufacture.