HS Code for Synchronous belt

Synchronous belts, commonly known as timing belts, are classified under HS code 4010.36 when they are made of vulcanized rubber and meet specific dimensional criteria. Heading 4010 covers conveyor or transmission belts or belting of vulcanized rubber. Within this heading, the 4010.3x series is dedicated to transmission belts. Subheading 4010.36 specifically identifies endless synchronous belts with an outside circumference exceeding 150 cm but not exceeding 198 cm. The classification is determined by three primary factors: the material (vulcanized rubber), the function (synchronous transmission, meaning they have teeth to prevent slipping), and the physical measurement of the circumference. These belts are critical components in internal combustion engines and industrial machinery where precise timing between shafts is required. The Harmonized System uses precise measurement ranges to differentiate these belts because different sizes serve distinct industrial applications and may be subject to different trade regulations or standards.

Products Included

• Endless rubber timing belts (150cm-198cm circumference)
• Toothed synchronous transmission belts for industrial machinery
• Automotive timing belts within the specified size range
• Reinforced rubber synchronous belts for power transmission

Common Misclassification

The most common misclassification occurs between different subheadings of 4010 based on circumference. For example, HS code 4010.35 is for synchronous belts with a circumference between 60 cm and 150 cm, while 4010.39 covers 'other' transmission belts that do not meet the specific synchronous or size criteria. It is also common to confuse these with V-belts (HS codes 4010.31 through 4010.34), which have a trapezoidal cross-section and do not have teeth. Finally, belts made of plastics rather than vulcanized rubber must be classified in Chapter 39 (specifically 3926.90), regardless of their function or size.

FAQ

What is the HS code for a synchronous belt?

For an endless synchronous rubber belt with a circumference between 150 cm and 198 cm, the HS code is 4010.36.

How do I measure a synchronous belt for HS classification?

You must measure the outside circumference of the belt in its endless (looped) state. The presence of teeth (cogs) confirms it is 'synchronous' rather than a standard V-belt.