4010.36 - Endless synchronous belts of an outside circumference exceeding 150 cm but not exceeding 198 cm:

This HTS category, 4010.36, specifically classifies endless synchronous belts made of vulcanized rubber. The defining characteristic for inclusion in this sub-heading is the belt's outside circumference, which must exceed 150 cm but not exceed 198 cm. Synchronous belts are designed with teeth or cogs on their inner surface that mesh with corresponding grooves on pulleys, enabling precise, non-slip power transmission.

When distinguishing 4010.36 from its sibling categories, the key differentiating factors are the type of belt (synchronous versus trapezoidal cross-section V-belts) and the specific circumference range. While other categories within 4010.3 discuss V-belts or synchronous belts with different circumference limits, this sub-heading isolates synchronous belts within the 150-198 cm circumference bracket. This precise measurement is crucial for distinguishing between belts with potentially different applications and performance characteristics.

The subcategories under 4010.36, such as "Combined with textile materials" and "Other," serve to further refine the classification based on additional material compositions or specific product variations not covered by the primary description. For instance, if a synchronous belt within this circumference range is reinforced with textile materials to enhance its strength or durability, it would fall under the former. The "Other" designation is a catch-all for synchronous belts that meet the circumference criteria but do not fit into any more specific sub-classifications.