Chapter 84 is the major category in the HS classification system for mechanical appliances and parts, covering power machinery, metalworking machine tools, woodworking machinery, food processing machinery, office machinery, automatic data processing equipment, other general machinery, and machinery not elsewhere specified. This chapter emphasizes the "functional" attribute of machinery, namely achieving physical or chemical changes such as processing, handling, printing, and data processing through mechanical motion. For machine tools and their parts, Chapter 84 provides a complete classification hierarchy from complete machines to specialized components, and is one of the core chapters for classifying electromechanical products in international trade. Heading 8466 covers parts and accessories specially designed or primarily designed for use with the machine tools listed in headings 8456 to 8465, including work holders, dividing heads, molds, tool holders, automatic tool changers, etc. This heading does not include cutting tools themselves (classified in Chapter 82) or machinery with independent functions (classified in other headings). Its core criterion is: the part or accessory must be used in conjunction with the machine tools of headings 8456-8465 and must not constitute goods more specifically covered by another heading. Code 846630 is a six-digit subheading. The first 2 digits "84" represent Chapter 84 (mechanical appliances and parts); digits 3-4 "66" represent heading 8466 (parts and accessories for machine tools); digits 5-6 "30" represent subheading 8466.30, namely "dividing heads and other special attachments for machine tools." Among these, a dividing head is a device used to precisely rotate and position workpieces on machine tools, commonly found on milling machines, grinding machines, drilling machines, etc. This subheading is distinguished from 8466.10 (work holders), 8466.20 (parts of work holders), 8466.91 (molds), etc., and specifically targets attachments such as dividing heads that have a rotary indexing function. As a special attachment for machine tools, a machine tool dividing head is used to precisely index or rotate workpieces during processing, and its function is subordinate to the machine tool and does not independently complete processing. Therefore, it is not a cutting tool of Chapter 82, nor is it a complete machine of Chapter 84 (such as 8459 milling machines). At the same time, it has a more specific function than general work holders (8466.10), so it is classified under 8466.30. If the dividing head is a measuring instrument used independently, it may be classified under Chapter 90, but when used as a machine tool attachment, 846630 is the correct classification.
Chapter
Chapter 84 is the major category in the HS classification system for mechanical appliances and parts, covering power machinery, metalworking machine tools, woodworking machinery, food processing machinery, office machinery, automatic data processing equipment, other general machinery, and machinery not elsewhere specified. This chapter emphasizes the "functional" attribute of machinery, namely achieving physical or chemical changes such as processing, handling, printing, and data processing through mechanical motion. For machine tools and their parts, Chapter 84 provides a complete classification hierarchy from complete machines to specialized components, and is one of the core chapters for classifying electromechanical products in international trade.
Heading
Heading 8466 covers parts and accessories specially designed or primarily designed for use with the machine tools listed in headings 8456 to 8465, including work holders, dividing heads, molds, tool holders, automatic tool changers, etc. This heading does not include cutting tools themselves (classified in Chapter 82) or machinery with independent functions (classified in other headings). Its core criterion is: the part or accessory must be used in conjunction with the machine tools of headings 8456-8465 and must not constitute goods more specifically covered by another heading.
Digit Breakdown
Code 846630 is a six-digit subheading. The first 2 digits "84" represent Chapter 84 (mechanical appliances and parts); digits 3-4 "66" represent heading 8466 (parts and accessories for machine tools); digits 5-6 "30" represent subheading 8466.30, namely "dividing heads and other special attachments for machine tools." Among these, a dividing head is a device used to precisely rotate and position workpieces on machine tools, commonly found on milling machines, grinding machines, drilling machines, etc. This subheading is distinguished from 8466.10 (work holders), 8466.20 (parts of work holders), 8466.91 (molds), etc., and specifically targets attachments such as dividing heads that have a rotary indexing function.
Classification Basis
As a special attachment for machine tools, a machine tool dividing head is used to precisely index or rotate workpieces during processing, and its function is subordinate to the machine tool and does not independently complete processing. Therefore, it is not a cutting tool of Chapter 82, nor is it a complete machine of Chapter 84 (such as 8459 milling machines). At the same time, it has a more specific function than general work holders (8466.10), so it is classified under 8466.30. If the dividing head is a measuring instrument used independently, it may be classified under Chapter 90, but when used as a machine tool attachment, 846630 is the correct classification.
📝 Declaration Elements
Product name: The Chinese and English names of the declared goods should be accurately described as "machine tool dividing head" or "dividing head," avoiding vague expressions such as "rotary table." Use: Explain the type of machine tool for which the dividing head is specially used (such as milling machine, grinding machine, drilling machine) and the processing scenario, reflecting its subordinate nature to the machine tool. Brand: Fill in the manufacturer or brand name. If there is no brand, indicate "no brand" and avoid leaving it blank. Model: Fill in the specific model of the product to facilitate customs identification of specifications and functions, and it should be consistent with the physical nameplate. Working principle: Briefly describe the indexing method of the dividing head (such as worm gear and worm, CNC servo) and the precision grade, highlighting its indexing function. Material: The material of the main components (such as cast iron, steel) affects classification and valuation, and must be truthfully declared. CNC or not: Declare whether it is a CNC dividing head. CNC and non-CNC may have different regulatory conditions. Product name: machine tool dividing head; Use: used for CNC milling machines, rotating the workpiece for indexing during processing; Brand: XX; Model: FH-200; Working principle: worm gear and worm drive, manual indexing, indexing accuracy ±5 seconds; Material: cast iron; CNC or not: non-CNC. Mistakenly classifying the dividing head under 8466.10 (work holders), ignoring its indexing function. Failing to declare "CNC or not," affecting customs judgment of regulatory conditions. Declaring the material as "metal" is too general and may trigger valuation doubts.
Product name
The Chinese and English names of the declared goods should be accurately described as "machine tool dividing head" or "dividing head," avoiding vague expressions such as "rotary table."
⚠️ Mistakenly declaring it as "machine tool attachment" or "fixture" without specifically identifying it as a dividing head.
Use
Explain the type of machine tool for which the dividing head is specially used (such as milling machine, grinding machine, drilling machine) and the processing scenario, reflecting its subordinate nature to the machine tool.
⚠️ Vaguely filling in "used for machine tools" without specifying the type of machine tool it is matched with.
Brand
Fill in the manufacturer or brand name. If there is no brand, indicate "no brand" and avoid leaving it blank.
⚠️ Mistakenly reporting the trader as the brand, or omitting it entirely.
Model
Fill in the specific model of the product to facilitate customs identification of specifications and functions, and it should be consistent with the physical nameplate.
⚠️ The model is incomplete or inconsistent with the actual product.
Working principle
Briefly describe the indexing method of the dividing head (such as worm gear and worm, CNC servo) and the precision grade, highlighting its indexing function.
⚠️ The description is too simple and does not reflect the indexing function.
Material
The material of the main components (such as cast iron, steel) affects classification and valuation, and must be truthfully declared.
⚠️ Only filling in "metal" without specifying the specific material.
CNC or not
Declare whether it is a CNC dividing head. CNC and non-CNC may have different regulatory conditions.
⚠️ Ignoring this element, leading to misjudgment of regulatory conditions.
Example： Product name: machine tool dividing head; Use: used for CNC milling machines, rotating the workpiece for indexing during processing; Brand: XX; Model: FH-200; Working principle: worm gear and worm drive, manual indexing, indexing accuracy ±5 seconds; Material: cast iron; CNC or not: non-CNC.
Common Mistakes：
Mistakenly classifying the dividing head under 8466.10 (work holders), ignoring its indexing function.
Failing to declare "CNC or not," affecting customs judgment of regulatory conditions.
Declaring the material as "metal" is too general and may trigger valuation doubts.
🎯 Classification Logic
The core basis for classification is the Import and Export Tariff and HS Explanatory Notes. Heading 8466 explicitly includes "dividing heads and other special attachments for machine tools." A dividing head must meet the following: 1) it is specially used for machine tools of headings 8456-8465; 2) it has an indexing or rotary positioning function; 3) it does not independently constitute a complete machine. If the dividing head is measuring equipment used independently, it should be classified under Chapter 90; if it is a component of a machine tool and is declared together with the machine tool, it may be classified as a complete machine. 846610 Work holders: 846610 covers devices for holding workpieces, such as chucks and vises, whose function is fixing rather than indexing; the dividing head of 846630 has a rotary indexing function. 846620 Parts of work holders: 846620 is a special part of a fixture, while 846630 is a complete dividing head attachment; the two are at different levels. 846693 Other machine tool parts: 846693 covers machine tool parts not elsewhere specified, while 846630 specifically lists dividing heads, so priority is given to 846630. 903180 Other measuring instruments: If the dividing head is used independently to measure angles, it is classified under 903180; but when used as a machine tool attachment, it is classified under 846630. Is it specially used for machine tools of headings 8456-8465? Does it have an indexing or rotary positioning function? Is it used independently of the machine tool? Is it confused with cutting tools or measuring instruments? Is it already specifically named under 8466.30?
Basis
The core basis for classification is the Import and Export Tariff and HS Explanatory Notes. Heading 8466 explicitly includes "dividing heads and other special attachments for machine tools." A dividing head must meet the following: 1) it is specially used for machine tools of headings 8456-8465; 2) it has an indexing or rotary positioning function; 3) it does not independently constitute a complete machine. If the dividing head is measuring equipment used independently, it should be classified under Chapter 90; if it is a component of a machine tool and is declared together with the machine tool, it may be classified as a complete machine.
Confused Codes：
846610 - Work holders
846610 covers devices for holding workpieces, such as chucks and vises, whose function is fixing rather than indexing; the dividing head of 846630 has a rotary indexing function.
846620 - Parts of work holders
846620 is a special part of a fixture, while 846630 is a complete dividing head attachment; the two are at different levels.
846693 - Other machine tool parts
846693 covers machine tool parts not elsewhere specified, while 846630 specifically lists dividing heads, so priority is given to 846630.
903180 - Other measuring instruments
If the dividing head is used independently to measure angles, it is classified under 903180; but when used as a machine tool attachment, it is classified under 846630.
Self-Check：
✓ Is it specially used for machine tools of headings 8456-8465?
✓ Does it have an indexing or rotary positioning function?
✓ Is it used independently of the machine tool?
✓ Is it confused with cutting tools or measuring instruments?
✓ Is it already specifically named under 8466.30?
❓ FAQ
How should machine tool dividing heads and ordinary work holders be distinguished in classification? The main function of ordinary work holders (8466.10) is to clamp and fix workpieces, while the core function of a dividing head (8466.30) is rotation and indexing, enabling the workpiece to precisely change angle during processing. If a device has both clamping and indexing functions, classification is determined by its main function, usually under 8466.30. Are CNC dividing heads and non-CNC dividing heads the same in HS code? Both are classified under 8466.30 because the HS code is not subdivided by CNC or non-CNC. However, when declaring, it is necessary to indicate "CNC or not," because CNC dividing heads may involve export controls or automatic licensing, affecting regulatory conditions. How should a dividing head be classified when imported together with a machine tool as a component of the machine tool? If the dividing head is declared together with the machine tool and constitutes an inseparable part of the complete machine, it should be classified as the complete machine (such as 8459 milling machine). If imported separately or as a spare part, it is classified under 8466.30. How can I check the import tariff rate and regulatory conditions for 846630? It can be checked through the official website of the General Administration of Customs, China International Trade Single Window, or the Import and Export Tariff. Tariff rates and regulatory conditions change with policy adjustments; it is recommended to use the latest version or consult a professional customs broker. How should "working principle" be filled in among the declaration elements for a dividing head? Briefly explain the indexing method, such as "worm gear and worm manual indexing" or "servo motor-driven CNC indexing," and indicate the indexing accuracy. Avoid vague descriptions such as only filling in "rotation." If the dividing head has a motor, will it affect classification? A dividing head with a motor is still classified under 8466.30, but it is necessary to declare "CNC or not" and "motor power." If the motor enables the dividing head to have an independent processing function, the classification may change and requires specific analysis. How can confusion between 846630 and 846693 be avoided in classification? 846630 specifically lists dividing heads and is a priority classification; 846693 is a residual heading and applies only to machine tool parts not elsewhere specified. Therefore, dividing heads must be classified under 846630 and cannot be classified under 846693.
Q: How should machine tool dividing heads and ordinary work holders be distinguished in classification?
A: The main function of ordinary work holders (8466.10) is to clamp and fix workpieces, while the core function of a dividing head (8466.30) is rotation and indexing, enabling the workpiece to precisely change angle during processing. If a device has both clamping and indexing functions, classification is determined by its main function, usually under 8466.30.
Q: Are CNC dividing heads and non-CNC dividing heads the same in HS code?
A: Both are classified under 8466.30 because the HS code is not subdivided by CNC or non-CNC. However, when declaring, it is necessary to indicate "CNC or not," because CNC dividing heads may involve export controls or automatic licensing, affecting regulatory conditions.
Q: How should a dividing head be classified when imported together with a machine tool as a component of the machine tool?
A: If the dividing head is declared together with the machine tool and constitutes an inseparable part of the complete machine, it should be classified as the complete machine (such as 8459 milling machine). If imported separately or as a spare part, it is classified under 8466.30.
Q: How can I check the import tariff rate and regulatory conditions for 846630?
A: It can be checked through the official website of the General Administration of Customs, China International Trade Single Window, or the Import and Export Tariff. Tariff rates and regulatory conditions change with policy adjustments; it is recommended to use the latest version or consult a professional customs broker.
Q: How should "working principle" be filled in among the declaration elements for a dividing head?
A: Briefly explain the indexing method, such as "worm gear and worm manual indexing" or "servo motor-driven CNC indexing," and indicate the indexing accuracy. Avoid vague descriptions such as only filling in "rotation."
Q: If the dividing head has a motor, will it affect classification?
A: A dividing head with a motor is still classified under 8466.30, but it is necessary to declare "CNC or not" and "motor power." If the motor enables the dividing head to have an independent processing function, the classification may change and requires specific analysis.
Q: How can confusion between 846630 and 846693 be avoided in classification?
A: 846630 specifically lists dividing heads and is a priority classification; 846693 is a residual heading and applies only to machine tool parts not elsewhere specified. Therefore, dividing heads must be classified under 846630 and cannot be classified under 846693.
⚠️ 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.