Chapter 84 covers nuclear reactors, boilers, machinery, mechanical appliances and parts thereof, and is one of the largest chapters in the HS classification, involving power machinery, agricultural machinery, machine tools, office equipment, automatic data processing equipment, etc. Goods in this chapter generally have the characteristics of power drive, mechanical movement or energy conversion, but exclude electrical equipment (Chapter 85), vehicles (Chapter 87) and optical instruments (Chapter 90). Heading 8463 covers other types of metalworking machine tools, specifically including: metal drawing machines, thread rolling machines, thread processing machine tools for bolts, nuts, screws, etc., as well as wire product processing machine tools. These machine tools process metal by plastic deformation rather than cutting, and belong to chipless processing equipment. First 2 digits 84: belongs to Chapter 84, representing mechanical appliance goods. Digits 3-4 63: heading 8463, referring to machine tools for processing metal by plastic deformation among metalworking machine tools, including drawing machines, thread rolling machines, bolt and nut processing machines, etc. Digits 5-6 20: subheading 846320, specifically referring to CNC thread rolling machines, i.e., thread rolling machine tools controlled by CNC technology. This subheading is further distinguished from other non-CNC thread rolling machines (846310) and drawing machines (846310), etc. This commodity is a CNC thread rolling machine. Its core function is to process metal threads by rolling plastic deformation, which falls within the scope of thread rolling machines under heading 8463. Because it has CNC characteristics, it is classified under subheading 846320, rather than non-CNC 846310 (drawing machines and non-CNC thread rolling machines). It differs from cutting machine tools (8457-8462) in that the processing principle is chipless forming.
Chapter
Chapter 84 covers nuclear reactors, boilers, machinery, mechanical appliances and parts thereof, and is one of the largest chapters in the HS classification, involving power machinery, agricultural machinery, machine tools, office equipment, automatic data processing equipment, etc. Goods in this chapter generally have the characteristics of power drive, mechanical movement or energy conversion, but exclude electrical equipment (Chapter 85), vehicles (Chapter 87) and optical instruments (Chapter 90).
Heading
Heading 8463 covers other types of metalworking machine tools, specifically including: metal drawing machines, thread rolling machines, thread processing machine tools for bolts, nuts, screws, etc., as well as wire product processing machine tools. These machine tools process metal by plastic deformation rather than cutting, and belong to chipless processing equipment.
Digit Breakdown
First 2 digits 84: belongs to Chapter 84, representing mechanical appliance goods. Digits 3-4 63: heading 8463, referring to machine tools for processing metal by plastic deformation among metalworking machine tools, including drawing machines, thread rolling machines, bolt and nut processing machines, etc. Digits 5-6 20: subheading 846320, specifically referring to CNC thread rolling machines, i.e., thread rolling machine tools controlled by CNC technology. This subheading is further distinguished from other non-CNC thread rolling machines (846310) and drawing machines (846310), etc.
Classification Basis
This commodity is a CNC thread rolling machine. Its core function is to process metal threads by rolling plastic deformation, which falls within the scope of thread rolling machines under heading 8463. Because it has CNC characteristics, it is classified under subheading 846320, rather than non-CNC 846310 (drawing machines and non-CNC thread rolling machines). It differs from cutting machine tools (8457-8462) in that the processing principle is chipless forming.
📝 Declaration Elements
Product Name: The declared commodity name shall use a standardized Chinese or English name, such as "CNC thread rolling machine" or "CNC thread rolling machine". Brand: Fill in the manufacturer or brand name, such as "SACMA", "Baosteel", etc.; if there is no brand, fill in "no brand". Model: Fill in the specific model of the equipment, such as "TR-500CNC", to distinguish specifications and functions. Processing Method: State "CNC rolling forming" or "CNC thread rolling", emphasizing chipless plastic deformation. Processing Object: Fill in the processed material, such as "metal bolts, screws, threaded rods", etc. Control Method: Indicate "CNC" or "CNC", and specify the control system brand (such as Siemens, Fanuc). Function: Describe the main function of the equipment, such as "used for rolling external threads" or "processing bolt threads". Power: Fill in the main motor power (kW) as an auxiliary parameter for judging equipment specifications. Customs declaration example:
Product Name: CNC thread rolling machine
Brand: SACMA
Model: TR-500CNC
Processing Method: CNC rolling forming
Processing Object: metal bolts, screws
Control Method: CNC (Siemens 840D)
Function: used for rolling external threads
Power: 15 kW
HS Code: 84632000
Quantity: 1 unit
Total Price: USD 120,000 Mistakenly classifying "CNC thread rolling machine" under 8458 (CNC lathe) because the emphasis on "rolling" rather than "cutting" is not made. Failure to indicate "CNC" at the time of declaration, resulting in classification under 846310 (non-CNC thread rolling machine) and affecting regulatory conditions. False declaration of brand and model may trigger customs doubts and transfer to inspection, delaying customs clearance.
Product Name
The declared commodity name shall use a standardized Chinese or English name, such as "CNC thread rolling machine" or "CNC thread rolling machine".
⚠️ Mistakenly declared as "CNC lathe" or "thread processing machine tool", failing to reflect the plastic deformation characteristic of "rolling".
Brand
Fill in the manufacturer or brand name, such as "SACMA", "Baosteel", etc.; if there is no brand, fill in "no brand".
⚠️ Mistakenly filling in a trader's brand as the manufacturer's brand, or omitting the brand, causing classification disputes.
Model
Fill in the specific model of the equipment, such as "TR-500CNC", to distinguish specifications and functions.
⚠️ Incomplete model entry or inconsistency with the actual item, affecting customs inspection.
Processing Method
State "CNC rolling forming" or "CNC thread rolling", emphasizing chipless plastic deformation.
⚠️ Mistakenly filling in "cutting processing" or "turning", leading to incorrect classification under codes such as 8458/8459.
Processing Object
Fill in the processed material, such as "metal bolts, screws, threaded rods", etc.
⚠️ Generally filling in "metal" or "steel" without specifying threaded parts.
Control Method
Indicate "CNC" or "CNC", and specify the control system brand (such as Siemens, Fanuc).
⚠️ Writing only "automatic" without clarifying "CNC", which may result in classification under a non-CNC subheading.
Function
Describe the main function of the equipment, such as "used for rolling external threads" or "processing bolt threads".
⚠️ Omitting "rolling" or mistakenly writing "thread turning", leading to classification errors.
Power
Fill in the main motor power (kW) as an auxiliary parameter for judging equipment specifications.
⚠️ Mistakenly filling in the power unit as "horsepower" or omitting it, affecting customs statistics.
Example： Customs declaration example:
Product Name: CNC thread rolling machine
Brand: SACMA
Model: TR-500CNC
Processing Method: CNC rolling forming
Processing Object: metal bolts, screws
Control Method: CNC (Siemens 840D)
Function: used for rolling external threads
Power: 15 kW
HS Code: 84632000
Quantity: 1 unit
Total Price: USD 120,000
Common Mistakes：
Mistakenly classifying "CNC thread rolling machine" under 8458 (CNC lathe) because the emphasis on "rolling" rather than "cutting" is not made.
Failure to indicate "CNC" at the time of declaration, resulting in classification under 846310 (non-CNC thread rolling machine) and affecting regulatory conditions.
False declaration of brand and model may trigger customs doubts and transfer to inspection, delaying customs clearance.
🎯 Classification Logic
Core basis for classification: According to the Explanatory Notes, heading 8463 includes machine tools for processing metal by plastic deformation such as rolling and drawing. CNC thread rolling machines meet the function of "thread rolling" and use CNC system control, so they are classified under 846320. Note: if the equipment also has cutting functions, it shall be classified according to the main function; if it is a cold heading machine, it should be classified under 8462. When classifying, it is necessary to check the equipment technical parameters and confirm that the processing principle is chipless forming. 846310 Non-CNC thread rolling machines and drawing machines: 846310 is for non-CNC thread rolling machines or metal drawing machines, while 846320 specifically refers to CNC thread rolling machines. The core difference lies in whether a CNC system is equipped. 845811 CNC horizontal lathes: 845811 is a CNC lathe, which processes threads by cutting away material; 846320 is rolling forming, with no chips generated, and the processing principle is different. 846221 CNC bending and folding machines: 846221 is used for bending and forming plates, with plates and strips as the processing object; 846320 is specifically used for thread rolling, with shaft-type threaded parts as the processing object. 846242 CNC punching machines: 846242 processes holes or forms by punching and belongs to punching machine tools; 846320 uses rolling dies for plastic deformation and has a specialized function. 847981 Metal processing machinery: 847981 includes wire processing machinery, but if a thread rolling machine is specifically used for thread forming, it is still classified under 846320. Is the equipment controlled by a CNC system? Is the processing principle rolling plastic deformation? Is it specifically used for processing threads (such as bolts, screws)? Does it have cutting functions? If only auxiliary, it does not affect classification. Are the brand and model consistent with the actual item?
Basis
Core basis for classification: According to the Explanatory Notes, heading 8463 includes machine tools for processing metal by plastic deformation such as rolling and drawing. CNC thread rolling machines meet the function of "thread rolling" and use CNC system control, so they are classified under 846320. Note: if the equipment also has cutting functions, it shall be classified according to the main function; if it is a cold heading machine, it should be classified under 8462. When classifying, it is necessary to check the equipment technical parameters and confirm that the processing principle is chipless forming.
Confused Codes：
846310 - Non-CNC thread rolling machines and drawing machines
846310 is for non-CNC thread rolling machines or metal drawing machines, while 846320 specifically refers to CNC thread rolling machines. The core difference lies in whether a CNC system is equipped.
845811 - CNC horizontal lathes
845811 is a CNC lathe, which processes threads by cutting away material; 846320 is rolling forming, with no chips generated, and the processing principle is different.
846221 - CNC bending and folding machines
846221 is used for bending and forming plates, with plates and strips as the processing object; 846320 is specifically used for thread rolling, with shaft-type threaded parts as the processing object.
846242 - CNC punching machines
846242 processes holes or forms by punching and belongs to punching machine tools; 846320 uses rolling dies for plastic deformation and has a specialized function.
847981 - Metal processing machinery
847981 includes wire processing machinery, but if a thread rolling machine is specifically used for thread forming, it is still classified under 846320.
Self-Check：
✓ Is the equipment controlled by a CNC system?
✓ Is the processing principle rolling plastic deformation?
✓ Is it specifically used for processing threads (such as bolts, screws)?
✓ Does it have cutting functions? If only auxiliary, it does not affect classification.
✓ Are the brand and model consistent with the actual item?
❓ FAQ
How to distinguish CNC thread rolling machines from CNC lathes in HS codes? CNC thread rolling machines are classified under 846320 and process threads by rolling plastic deformation, with no chips; CNC lathes are classified under 8458 and remove material by cutting. The key difference lies in the processing principle: rolling vs. cutting. At the time of declaration, "rolling forming" should be clearly stated and CNC should be indicated. If the equipment can both roll threads and turn threads, which code should it be classified under? According to the General Rules for Classification, it shall be classified according to the main function. If the equipment is mainly for thread rolling, it is classified under 846320; if it is mainly for turning, it is classified under 8458. Technical specifications shall be provided to prove the main function. How should "Processing Method" be filled in among the declaration elements for CNC thread rolling machines? It should be filled in as "CNC rolling forming" or "CNC thread rolling", emphasizing chipless plastic deformation. Avoid filling in "turning" or "cutting", otherwise it may lead to classification errors. What is the export tax rebate rate for 846320? The export tax rebate rate will be adjusted with national policies. It is recommended to check the latest rebate rate through the "China Customs HS Code Query System" or "Export Tax Rebate Consultation Network". Generally, the rebate rate for mechanical and electrical products is relatively high, but real-time data shall prevail. What regulatory documents are required for importing CNC thread rolling machines? Generally, an automatic import license (O certificate) or mechanical and electrical product import license is required, depending on the equipment parameters and use. In addition, a pre-shipment inspection certificate may be required (if it is used equipment). It is recommended to consult the local customs or customs broker. How to query the customs regulatory conditions corresponding to 846320? It can be queried through the "Import and Export Tariff" on the official website of the General Administration of Customs, or by using the "Customs HS Code Query" app. Regulatory conditions are usually displayed as letters such as "A/B"; A represents import regulation, B represents export regulation, and the specific meaning shall refer to the "Regulatory Document Code Table". Is the classification of CNC thread rolling machines affected by brand? HS classification is mainly based on the function, principle and specifications of the commodity; brand does not affect classification. However, the brand must be truthfully filled in at the time of declaration for customs statistics and intellectual property protection. If a CNC thread rolling machine is used to process non-metal threads, can it still be classified under 846320? No. Heading 8463 only applies to metalworking machine tools. If it is used to process plastic or wood threads, it should be classified under 8465 (machine tools for processing wood, plastics, etc.). Therefore, it is necessary to clarify that the processing object is metal.
Q: How to distinguish CNC thread rolling machines from CNC lathes in HS codes?
A: CNC thread rolling machines are classified under 846320 and process threads by rolling plastic deformation, with no chips; CNC lathes are classified under 8458 and remove material by cutting. The key difference lies in the processing principle: rolling vs. cutting. At the time of declaration, "rolling forming" should be clearly stated and CNC should be indicated.
Q: If the equipment can both roll threads and turn threads, which code should it be classified under?
A: According to the General Rules for Classification, it shall be classified according to the main function. If the equipment is mainly for thread rolling, it is classified under 846320; if it is mainly for turning, it is classified under 8458. Technical specifications shall be provided to prove the main function.
Q: How should "Processing Method" be filled in among the declaration elements for CNC thread rolling machines?
A: It should be filled in as "CNC rolling forming" or "CNC thread rolling", emphasizing chipless plastic deformation. Avoid filling in "turning" or "cutting", otherwise it may lead to classification errors.
Q: What is the export tax rebate rate for 846320?
A: The export tax rebate rate will be adjusted with national policies. It is recommended to check the latest rebate rate through the "China Customs HS Code Query System" or "Export Tax Rebate Consultation Network". Generally, the rebate rate for mechanical and electrical products is relatively high, but real-time data shall prevail.
Q: What regulatory documents are required for importing CNC thread rolling machines?
A: Generally, an automatic import license (O certificate) or mechanical and electrical product import license is required, depending on the equipment parameters and use. In addition, a pre-shipment inspection certificate may be required (if it is used equipment). It is recommended to consult the local customs or customs broker.
Q: How to query the customs regulatory conditions corresponding to 846320?
A: It can be queried through the "Import and Export Tariff" on the official website of the General Administration of Customs, or by using the "Customs HS Code Query" app. Regulatory conditions are usually displayed as letters such as "A/B"; A represents import regulation, B represents export regulation, and the specific meaning shall refer to the "Regulatory Document Code Table".
Q: Is the classification of CNC thread rolling machines affected by brand?
A: HS classification is mainly based on the function, principle and specifications of the commodity; brand does not affect classification. However, the brand must be truthfully filled in at the time of declaration for customs statistics and intellectual property protection.
Q: If a CNC thread rolling machine is used to process non-metal threads, can it still be classified under 846320?
A: No. Heading 8463 only applies to metalworking machine tools. If it is used to process plastic or wood threads, it should be classified under 8465 (machine tools for processing wood, plastics, etc.). Therefore, it is necessary to clarify that the processing object is metal.
⚠️ 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.