Chapter 40 covers vulcanized rubber and articles thereof, including raw materials such as natural rubber, synthetic rubber, and reclaimed rubber, as well as various rubber semi-finished and finished products. This chapter ranges from rubber in primary forms to final products such as tires, rubber hoses, transmission belts, and sanitary articles, and is the core classification chapter for rubber commodities in international trade. Heading 4010 specifically covers conveyor belts or transmission belts of vulcanized rubber, including V-belts, endless belts, etc. This heading distinguishes conveyor belts (for material transport) from transmission belts (for power transmission), and further subdivides subheadings based on cross-sectional shape, whether endless, whether reinforced, and other characteristics. The first 2 digits 40 represent Chapter 40 (Rubber and articles thereof); digits 3-4, 10, represent heading 4010 (conveyor belts or transmission belts of vulcanized rubber); digits 5-6, 31, represent subheading 401031, specifically endless transmission belts, V-ribbed (i.e., multiple V-belts). The 5th digit 3 indicates endless transmission belts, and the 6th digit 1 indicates V-ribbed cross-section. This subheading only covers endless transmission belts with V-ribs, and does not include transmission belts of other shapes or non-endless transmission belts. This commodity is an endless, V-ribbed transmission belt of vulcanized rubber, fully conforming to the description of subheading 401031. The adjacent code 401032 is endless synchronous belts, 401033 is other endless V-belts (non-ribbed), 401034 is other endless belts, and 401035 is other non-endless belts. Because it has V-ribbed characteristics, it is classified under 401031.

Product Name: Should be declared as "endless V-ribbed transmission belt of vulcanized rubber" or "multiple V-belt", avoiding colloquial names such as "fan belt". Material: Vulcanized rubber must be indicated, and the rubber type (e.g., NR, SBR, EPDM) and whether it contains a fabric reinforcement layer may be further specified. Structure: Should be described as endless, V-ribbed, and the number of ribs (e.g., 6PK, 8PK) and cross-sectional dimensions should be specified. Use: Indicate use for power transmission, such as automobile engines, industrial machinery, etc., avoiding confusion with conveyor belts. Brand: Fill in the brand name (if no brand, fill in "none"), which helps customs valuation and intellectual property verification. Model: Fill in the product model or specification code, such as 6PK1200, to facilitate customs identification. Whether Endless: Must be clearly declared as "endless", which is a key condition for classification under 401031. Whether V-ribbed: It is necessary to confirm that the cross-section is V-ribbed (multiple V), rather than ordinary V-shaped or synchronous toothed. Product Name: Endless V-ribbed transmission belt of vulcanized rubber (multiple V-belt); Material: Vulcanized rubber (EPDM), containing polyester cord reinforcement layer; Structure: Endless, V-ribbed, 6 ribs (6PK), cross-sectional dimensions: rib pitch 3.56mm, belt height 5.5mm; Use: Used for automobile engine front-end accessory drive; Brand: Gates; Model: 6PK1200; Whether Endless: Yes; Whether V-ribbed: Yes. Incorrectly reporting a non-endless transmission belt as endless, leading to incorrect classification under 401031. Confusing V-ribbed with ordinary V-belts; ordinary V-belts should be classified under 401033. Ignoring that the material is vulcanized rubber and incorrectly reporting as thermoplastic elastomer, which may lead to classification under Chapter 39. Failing to provide the number of ribs or cross-sectional dimensions, affecting customs determination of the subheading.

The core basis for classification is: 1) material is vulcanized rubber; 2) endless; 3) cross-section is V-ribbed (multiple V). All three must be satisfied simultaneously for classification under 401031. If non-endless, classify under 401035; if endless but not V-ribbed, classify according to cross-sectional shape under 401032 (synchronous belt), 401033 (other V-belts), or 401034 (other endless belts). 401032 Endless synchronous belts: Synchronous belts have a toothed cross-section and are used for precise transmission; V-ribbed belts have a wedge-ribbed cross-section and are used for friction transmission. 401033 Other endless V-belts: Ordinary V-belts have a single V-shaped cross-section without ribs; V-ribbed belts have multiple wedge ribs. 401034 Other endless belts: Includes flat belts, round belts, etc., without V-ribbed characteristics. 401035 Other non-endless belts: Non-endless, usually open belts, requiring on-site splicing; V-ribbed belts are usually endless. 401039 Other transmission belts of vulcanized rubber: Residual subheading for transmission belts not elsewhere specified, such as profile belts. Is the material vulcanized rubber? Is it endless? Is the cross-section V-ribbed? Is it used for power transmission? Are the number of ribs and cross-sectional dimensions provided?

How to query the tariff rate for HS code 401031? You can check the latest import tariff, value-added tax, and regulatory conditions by entering HS code 401031 on the official website of the General Administration of Customs of China, the International Trade Single Window, or third-party query platforms. Tariff rates vary by country, trade agreement, and annual adjustments, so it is recommended to refer to official publications. How to distinguish V-ribbed transmission belts from synchronous belts during customs declaration? Synchronous belts have a toothed cross-section and rely on meshing transmission, classified under 401032; V-ribbed belts have a wedge-ribbed cross-section and rely on friction transmission, classified under 401031. During customs declaration, cross-sectional photos or drawings should be provided to accurately declare structural characteristics. If the transmission belt is open (non-endless), which code should it be classified under? Non-endless transmission belts should be classified under 401035 (other non-endless belts). If V-ribbed but non-endless, it is also classified under 401035, because 401031 requires endless. Must brand and model be declared during customs declaration? Yes, brand and model are among the declaration elements and help customs valuation and intellectual property protection. If there is no brand, fill in "none"; the model should be filled in truthfully to avoid customs clearance delays or penalties due to omission. What are common applications of V-ribbed transmission belts? Commonly used in automobile engine front-end accessory drives (such as alternators, air conditioning compressors), industrial machinery transmission, etc. Their multiple V-rib structure provides a larger contact area and transmission efficiency. Can transmission belts classified under 401031 have a fabric reinforcement layer? Yes. Vulcanized rubber transmission belts often contain reinforcement layers such as fabric and cords. As long as the main material is vulcanized rubber and it meets the endless V-ribbed characteristics, it is still classified under 401031. How to determine whether a transmission belt is "V-ribbed"? Observe the cross-section. If there are multiple longitudinal wedge ribs (usually 3-10) with grooves between the ribs, it is V-ribbed. Reference can be made to industry standards such as ISO 9982 or SAE J1459. What regulatory documents are required for importing V-ribbed transmission belts? Usually no special regulatory documents are required, but they must comply with China Compulsory Certification (CCC) requirements (e.g., for automobiles). For details, you can check the regulatory condition codes issued by the General Administration of Customs or consult a customs broker.