Chapter 84 is the core chapter in the HS classification system covering mechanical equipment, including power machinery, agricultural machinery, machine tools, construction machinery, office equipment, automatic data processing equipment, bearings, transmission devices, etc. Goods in this chapter usually have power drive, moving parts, and specific functions, but exclude electrical equipment (Chapter 85), vehicles (Chapter 87), and optical instruments (Chapter 90). Within the chapter, tariff headings are arranged by function or use, such as 8401 nuclear reactors, 8426 cranes, 8430 drilling machinery, etc. Heading 8430 covers machinery not elsewhere specified for the transport, leveling, scraping, excavating, tamping, compacting, extracting or drilling of earth, minerals or ores; pile drivers and pile extractors; snow ploughs and snow blowers. This heading includes stationary and mobile machinery, but self-propelled coal cutters, rock drills and tunnel boring machines are separately classified under 8430.31, while other drilling or sinking machinery (such as oil drilling rigs) falls under 8430.41 or 8430.49. First 2 digits 84: Chapter 84, representing mechanical appliances, machinery and equipment and parts thereof, one of the largest chapters in the HS. Digits 3-4: 30: Heading 8430, indicating machinery not elsewhere specified for the transport, leveling, scraping, excavating, tamping, compacting, extracting or drilling of earth, minerals or ores; pile drivers and pile extractors; snow ploughs and snow blowers. Digits 5-6: 31: Subheading 8430.31, specifically referring to self-propelled coal cutters, rock drills and tunnel boring machines. This subheading emphasizes 'self-propelled' and the functions of 'coal cutting, rock drilling, tunnel boring,' distinguishing it from non-self-propelled machinery of the same type (classified under 8430.39) or other drilling machinery (8430.41/49). The goods are self-propelled coal cutters, rock drills or tunnel boring machines, with self-propelling capability, used for coal mining, rock drilling or tunnel excavation. Because they are self-propelled with specific functions, they are classified under 8430.31, rather than non-self-propelled 8430.39, nor other drilling machinery 8430.41/49. Meanwhile, if they are hand-held pneumatic tools, they would be classified under 8467; if tractor-drawn, they might be classified under 8705, but this code specifically refers to self-propelled construction machinery.
Chapter
Chapter 84 is the core chapter in the HS classification system covering mechanical equipment, including power machinery, agricultural machinery, machine tools, construction machinery, office equipment, automatic data processing equipment, bearings, transmission devices, etc. Goods in this chapter usually have power drive, moving parts, and specific functions, but exclude electrical equipment (Chapter 85), vehicles (Chapter 87), and optical instruments (Chapter 90). Within the chapter, tariff headings are arranged by function or use, such as 8401 nuclear reactors, 8426 cranes, 8430 drilling machinery, etc.
Heading
Heading 8430 covers machinery not elsewhere specified for the transport, leveling, scraping, excavating, tamping, compacting, extracting or drilling of earth, minerals or ores; pile drivers and pile extractors; snow ploughs and snow blowers. This heading includes stationary and mobile machinery, but self-propelled coal cutters, rock drills and tunnel boring machines are separately classified under 8430.31, while other drilling or sinking machinery (such as oil drilling rigs) falls under 8430.41 or 8430.49.
Digit Breakdown
First 2 digits 84: Chapter 84, representing mechanical appliances, machinery and equipment and parts thereof, one of the largest chapters in the HS. Digits 3-4: 30: Heading 8430, indicating machinery not elsewhere specified for the transport, leveling, scraping, excavating, tamping, compacting, extracting or drilling of earth, minerals or ores; pile drivers and pile extractors; snow ploughs and snow blowers. Digits 5-6: 31: Subheading 8430.31, specifically referring to self-propelled coal cutters, rock drills and tunnel boring machines. This subheading emphasizes 'self-propelled' and the functions of 'coal cutting, rock drilling, tunnel boring,' distinguishing it from non-self-propelled machinery of the same type (classified under 8430.39) or other drilling machinery (8430.41/49).
Classification Basis
The goods are self-propelled coal cutters, rock drills or tunnel boring machines, with self-propelling capability, used for coal mining, rock drilling or tunnel excavation. Because they are self-propelled with specific functions, they are classified under 8430.31, rather than non-self-propelled 8430.39, nor other drilling machinery 8430.41/49. Meanwhile, if they are hand-held pneumatic tools, they would be classified under 8467; if tractor-drawn, they might be classified under 8705, but this code specifically refers to self-propelled construction machinery.
📝 Declaration Elements
Product Name: The specific name of the declared goods, such as 'self-propelled tunnel boring machine' or 'self-propelled rock drill,' which must be consistent with the function. Brand Type: Fill in the brand attribute, such as 'foreign brand (OEM production),' 'domestic brand,' or 'no brand.' Model: Fill in the model specified by the manufacturer, such as 'TBM-500'; if no model, fill in 'no model.' Self-propulsion Method: Explain the power type of self-propulsion, such as 'electric self-propulsion,' 'internal combustion engine self-propulsion,' or 'hydraulic self-propulsion.' Use: Briefly describe the main use, such as 'for coal cutting in coal mines,' 'for tunnel boring,' or 'for rock drilling.' Power Source: Fill in the power source, such as 'electric motor,' 'diesel engine,' or 'hydraulic motor.' Brand: Fill in the actual brand name, such as 'Sandvik,' 'Sany Heavy Industry'; if no brand, fill in 'no brand.' Specifications and Dimensions: Fill in the main technical parameters, such as 'cutting height 3.5m,' 'drilling diameter 50mm,' etc. Product Name: self-propelled tunnel boring machine; Brand Type: foreign brand (OEM production); Model: TBM-500; Self-propulsion Method: electric self-propulsion; Use: for subway tunnel boring; Power Source: electric motor; Brand: Robbins; Specifications and Dimensions: excavation diameter 6.5 meters, total length 120 meters. Mistakenly classifying self-propelled rock drills under 8467 (hand-held pneumatic tools), ignoring their self-propelled and large construction machinery characteristics. Failing to distinguish self-propelled from non-self-propelled, resulting in incorrect classification under 8430.39 instead of 8430.31. Confusing tunnel boring machines with shield machines; shield machines are also generally classified under 8430.31, but attention must be paid to their self-propelled characteristics.
Product Name
The specific name of the declared goods, such as 'self-propelled tunnel boring machine' or 'self-propelled rock drill,' which must be consistent with the function.
⚠️ Incorrectly declaring as 'excavator' or 'drilling rig,' leading to classification errors.
Brand Type
Fill in the brand attribute, such as 'foreign brand (OEM production),' 'domestic brand,' or 'no brand.'
⚠️ Omitting the brand type, affecting customs statistics and intellectual property verification.
Model
Fill in the model specified by the manufacturer, such as 'TBM-500'; if no model, fill in 'no model.'
⚠️ Incomplete model entry or inconsistency with the actual product.
Self-propulsion Method
Explain the power type of self-propulsion, such as 'electric self-propulsion,' 'internal combustion engine self-propulsion,' or 'hydraulic self-propulsion.'
⚠️ Failing to indicate self-propulsion, resulting in incorrect classification under non-self-propelled subheadings.
Use
Briefly describe the main use, such as 'for coal cutting in coal mines,' 'for tunnel boring,' or 'for rock drilling.'
⚠️ Use description too broad, such as 'for engineering,' making it impossible to determine the specific function.
Power Source
Fill in the power source, such as 'electric motor,' 'diesel engine,' or 'hydraulic motor.'
⚠️ Confusing power source with self-propulsion method.
Brand
Fill in the actual brand name, such as 'Sandvik,' 'Sany Heavy Industry'; if no brand, fill in 'no brand.'
⚠️ Confusing brand with model, or providing false information.
Specifications and Dimensions
Fill in the main technical parameters, such as 'cutting height 3.5m,' 'drilling diameter 50mm,' etc.
⚠️ Omitting key dimensions, affecting customs valuation and classification.
Example： Product Name: self-propelled tunnel boring machine; Brand Type: foreign brand (OEM production); Model: TBM-500; Self-propulsion Method: electric self-propulsion; Use: for subway tunnel boring; Power Source: electric motor; Brand: Robbins; Specifications and Dimensions: excavation diameter 6.5 meters, total length 120 meters.
Common Mistakes：
Mistakenly classifying self-propelled rock drills under 8467 (hand-held pneumatic tools), ignoring their self-propelled and large construction machinery characteristics.
Failing to distinguish self-propelled from non-self-propelled, resulting in incorrect classification under 8430.39 instead of 8430.31.
Confusing tunnel boring machines with shield machines; shield machines are also generally classified under 8430.31, but attention must be paid to their self-propelled characteristics.
🎯 Classification Logic
Core classification basis: 1. Whether the goods belong to 'machinery for the transport, leveling, scraping, excavating, tamping, compacting, extracting or drilling of earth, minerals or ores'; 2. Whether they have 'self-propelled' capability, i.e., equipped with their own power unit and capable of traveling; 3. Whether the function is 'coal cutting, rock drilling or tunnel boring.' If all three conditions are met, classify under 8430.31. If non-self-propelled, classify under 8430.39; if other drilling machinery (such as oil drilling rigs), classify under 8430.41 or 8430.49. 8430.39 Other non-self-propelled coal cutters, rock drills and tunnel boring machines: The core difference lies in whether self-propelled. 8430.31 requires self-propulsion, while 8430.39 is non-self-propelled, usually requiring external traction or fixed installation. 8430.41 Self-propelled boring or sinking machinery: 8430.41 applies to drilling for oil, natural gas, water wells, etc., while 8430.31 is specifically for coal cutting, rock drilling and tunnel boring, with different functions. 8467 Hand-held pneumatic or hydraulic tools: 8467 covers hand-held tools, usually lightweight and hand-operated, while 8430.31 is large self-propelled machinery, not hand-held. 8705 Special purpose motor vehicles: 8705 includes crane trucks, drilling trucks, etc., but drilling trucks are usually classified under 8705.90, while 8430.31 is specialized construction machinery, not a vehicle chassis. 8479 Other machinery not elsewhere specified: 8479 is a residual heading; if goods meet the specific description of 8430.31, they should be classified under 8430.31 first, rather than 8479. Are the goods self-propelled? Is the function coal cutting, rock drilling or tunnel boring? Are they used for the extraction of earth, minerals or ores? Are they non-hand-held? Are they not more specifically classified under other headings?
Basis
Core classification basis: 1. Whether the goods belong to 'machinery for the transport, leveling, scraping, excavating, tamping, compacting, extracting or drilling of earth, minerals or ores'; 2. Whether they have 'self-propelled' capability, i.e., equipped with their own power unit and capable of traveling; 3. Whether the function is 'coal cutting, rock drilling or tunnel boring.' If all three conditions are met, classify under 8430.31. If non-self-propelled, classify under 8430.39; if other drilling machinery (such as oil drilling rigs), classify under 8430.41 or 8430.49.
Confused Codes：
8430.39 - Other non-self-propelled coal cutters, rock drills and tunnel boring machines
The core difference lies in whether self-propelled. 8430.31 requires self-propulsion, while 8430.39 is non-self-propelled, usually requiring external traction or fixed installation.
8430.41 - Self-propelled boring or sinking machinery
8430.41 applies to drilling for oil, natural gas, water wells, etc., while 8430.31 is specifically for coal cutting, rock drilling and tunnel boring, with different functions.
8467 - Hand-held pneumatic or hydraulic tools
8467 covers hand-held tools, usually lightweight and hand-operated, while 8430.31 is large self-propelled machinery, not hand-held.
8705 - Special purpose motor vehicles
8705 includes crane trucks, drilling trucks, etc., but drilling trucks are usually classified under 8705.90, while 8430.31 is specialized construction machinery, not a vehicle chassis.
8479 - Other machinery not elsewhere specified
8479 is a residual heading; if goods meet the specific description of 8430.31, they should be classified under 8430.31 first, rather than 8479.
Self-Check：
✓ Are the goods self-propelled?
✓ Is the function coal cutting, rock drilling or tunnel boring?
✓ Are they used for the extraction of earth, minerals or ores?
✓ Are they non-hand-held?
✓ Are they not more specifically classified under other headings?
❓ FAQ
How to determine whether a rock drill belongs to 8430.31? It must simultaneously meet: 1. Self-propelled (with its own power and traveling device); 2. Used for rock drilling; 3. Non-hand-held. If it is a hand-held pneumatic rock drill, it should be classified under 8467.11; if non-self-propelled, under 8430.39. What is the difference between tunnel boring machines and shield machines in HS codes? Both are generally classified under 8430.31, because shield machines are also a type of self-propelled tunnel boring machine. However, if a shield machine is mainly used for soft soil tunnels and its function is excavation, it still belongs to 8430.31. The difference is that shield machines may have lining functions, but the classification remains unchanged. Are the HS codes for self-propelled coal cutters and coal mining machines the same? Self-propelled coal cutters are classified under 8430.31, and coal mining machines, if self-propelled and used for coal cutting, are also classified under 8430.31. However, if the coal mining machine is of another type (such as a longwall shearer), it may be classified under 8430.39 or 8479, depending on the specific function and self-propulsion. Why is 'self-propulsion method' required in the declaration elements of 8430.31? Because 'self-propelled' is the key condition for classification under this subheading, customs needs to confirm that the goods have their own power and can travel. Filling in the method such as electric, internal combustion engine, etc., helps distinguish from non-self-propelled machinery (8430.39). If a tunnel boring machine is electrically driven but needs rail travel, does it count as self-propelled? Yes, as long as it has its own power unit and can move on its own (including rail travel), it is considered self-propelled. But if external traction is required, it is classified under 8430.39. How to distinguish between 8430.31 and 8430.49 drilling machinery? 8430.31 specifically refers to coal cutting, rock drilling and tunnel boring, while 8430.49 is for other non-self-propelled drilling machinery (e.g., self-propelled oil drilling rigs are classified under 8430.41). The core difference lies in function and self-propulsion: coal cutting/rock drilling/tunnel boring vs drilling/sinking. Are there special requirements for classifying imported used self-propelled rock drills? The classification remains unchanged, still 8430.31, but note that used equipment may involve import prohibitions or license requirements. When declaring, information such as country of origin and years of use must be provided, and customs may conduct inspection and valuation. Can small self-propelled rock drills sold via cross-border e-commerce be declared under 8430.31? If the rock drill is self-propelled and non-hand-held, it can be declared under 8430.31. However, cross-border e-commerce usually involves small parcels; if hand-held, it is classified under 8467. It is recommended to judge based on actual function and consult a customs broker.
Q: How to determine whether a rock drill belongs to 8430.31?
A: It must simultaneously meet: 1. Self-propelled (with its own power and traveling device); 2. Used for rock drilling; 3. Non-hand-held. If it is a hand-held pneumatic rock drill, it should be classified under 8467.11; if non-self-propelled, under 8430.39.
Q: What is the difference between tunnel boring machines and shield machines in HS codes?
A: Both are generally classified under 8430.31, because shield machines are also a type of self-propelled tunnel boring machine. However, if a shield machine is mainly used for soft soil tunnels and its function is excavation, it still belongs to 8430.31. The difference is that shield machines may have lining functions, but the classification remains unchanged.
Q: Are the HS codes for self-propelled coal cutters and coal mining machines the same?
A: Self-propelled coal cutters are classified under 8430.31, and coal mining machines, if self-propelled and used for coal cutting, are also classified under 8430.31. However, if the coal mining machine is of another type (such as a longwall shearer), it may be classified under 8430.39 or 8479, depending on the specific function and self-propulsion.
Q: Why is 'self-propulsion method' required in the declaration elements of 8430.31?
A: Because 'self-propelled' is the key condition for classification under this subheading, customs needs to confirm that the goods have their own power and can travel. Filling in the method such as electric, internal combustion engine, etc., helps distinguish from non-self-propelled machinery (8430.39).
Q: If a tunnel boring machine is electrically driven but needs rail travel, does it count as self-propelled?
A: Yes, as long as it has its own power unit and can move on its own (including rail travel), it is considered self-propelled. But if external traction is required, it is classified under 8430.39.
Q: How to distinguish between 8430.31 and 8430.49 drilling machinery?
A: 8430.31 specifically refers to coal cutting, rock drilling and tunnel boring, while 8430.49 is for other non-self-propelled drilling machinery (e.g., self-propelled oil drilling rigs are classified under 8430.41). The core difference lies in function and self-propulsion: coal cutting/rock drilling/tunnel boring vs drilling/sinking.
Q: Are there special requirements for classifying imported used self-propelled rock drills?
A: The classification remains unchanged, still 8430.31, but note that used equipment may involve import prohibitions or license requirements. When declaring, information such as country of origin and years of use must be provided, and customs may conduct inspection and valuation.
Q: Can small self-propelled rock drills sold via cross-border e-commerce be declared under 8430.31?
A: If the rock drill is self-propelled and non-hand-held, it can be declared under 8430.31. However, cross-border e-commerce usually involves small parcels; if hand-held, it is classified under 8467. It is recommended to judge based on actual function and consult a customs broker.
⚠️ Disclaimer: HS code classification, declaration elements, tariff rates and regulatory conditions on this page are for reference only and do not constitute legal advice on customs classification. Tariff rates and regulations are subject to change; the latest announcements from the General Administration of Customs and on-site determinations shall prevail. Please consult professional customs brokers or customs authorities before import/export.