Chapter 84 is a core chapter in the HS classification system, covering various machines, mechanical appliances and their parts, including power machinery, agricultural machinery, metalworking machine tools, office equipment, automatic data processing equipment, bearings, transmission devices, etc. Goods in this chapter generally have characteristics of power drive, mechanical movement or energy conversion, but exclude electrical equipment (Chapter 85), vehicles (Chapter 87) and optical instruments (Chapter 90). Within the chapter, classification is by function or industry, and it is the primary reference chapter for classifying mechanical and electrical products in international trade. Heading 8464 covers machine tools for working stone, ceramics, concrete, asbestos-cement or like mineral materials, or for cold working glass. Specifically, it includes machine tools for sawing, grinding, polishing, drilling, milling, etc. Machine tools under this heading typically use diamond tools, abrasives, or processes such as laser/water jet, but exclude machine tools for working metal (classified under 8456-8463) and woodworking machine tools (8465). The first 2 digits 84: indicates Chapter 84, i.e., nuclear reactors, boilers, machinery, mechanical appliances and their parts. The 3rd-4th digits 64: indicates heading 8464, i.e., machine tools for working stone, ceramics, concrete, asbestos-cement or like mineral materials or for cold working glass. The 5th-6th digits 10: indicates subheading 846410, specifically sawing machine tools, including circular saws, band saws, gang saws and other CNC or non-CNC sawing equipment used for cutting hard and brittle materials such as stone and ceramics. This subheading is further subdivided by processing method, but 846410 itself does not distinguish between CNC and non-CNC; all sawing machine tools are classified under this subheading. This commodity is a CNC stone cutting machine, whose core function is sawing stone, meeting the description of heading 8464. CNC (Computer Numerical Control) is only a control method and does not change its processing object and process. Therefore, it is classified under 846410 (sawing machine tools), not 846490 (other machine tools) or 846420 (grinding or polishing machine tools). If the processing object is metal, it should be classified under 8456-8463; if it is wood, under 8465.

Product Name: The standard name of the declared commodity, which should include the processing object, function, and control method, such as 'CNC stone cutting machine'. Use: Explain the application scenario of the machine, such as 'used in stone processing plants to cut marble and granite slabs'. Working Principle: Briefly describe the cutting method, such as 'diamond circular saw blade rotating cutting, CNC system controlling feed'. Brand: Fill in the machine brand; if no brand, fill in 'no brand'. Model: Fill in the specific model, such as 'CNC-3500'. Processing Material: Clearly specify the processing object, such as 'marble, granite, ceramics and other mineral materials'. CNC Device: Indicate whether a CNC system is equipped, such as 'equipped with Fanuc CNC system'. Cutting Method: Such as 'circular saw cutting', 'band saw cutting', 'water jet cutting', etc. Product Name: CNC stone cutting machine; Use: used for cutting marble and granite slabs; Working Principle: diamond circular saw blade rotating, CNC system controlling three-axis linkage; Brand: XX; Model: CNC-3500; Processing Material: natural marble, granite; CNC Device: Fanuc 0i-MF; Cutting Method: circular saw cutting; Power: 15kW; Dimensions: 4000×2000×1800mm. Mistakenly classifying CNC stone cutting machine under 846490 because CNC is considered the main feature, but actually the sawing function determines the classification. Declaring the processing material as 'metal' or 'wood', leading to classification under 8456 or 8465; it must be accurately declared as stone and other mineral materials. Filling in the cutting method as 'water jet' but actually it is saw blade cutting; water jet cutting may be classified under 846490, and it must be consistent with the actual product.

The core basis for classification is: 1) whether the processing object is stone, ceramics, concrete and other mineral materials; 2) whether the processing method is sawing; 3) whether a CNC device is installed does not affect subheading classification. According to HS notes, 8464 includes machine tools for sawing stone with saw blades, saw bands or abrasives, whether or not CNC. If the processing object is metal, it is classified under 8456-8463; if wood, under 8465. If it is water jet cutting, although it can cut stone, it is usually classified under 846490 (other machine tools) because water jet is not traditional sawing. 846420 Grinding or polishing machine tools: Used for grinding and polishing stone, not sawing. If a machine has both sawing and polishing functions, classify according to the main function, or classify separately. 846490 Other machine tools for working mineral materials: Includes water jet cutting, drilling, milling and other non-sawing machine tools. Water jet cutting of stone is often classified under this code, not 846410. 845650 Sawing machine tools for working metal: The processing object is metal, while 846410 processes stone and other mineral materials. If a machine can process multiple materials, classify according to the main use. 846591 Sawing machine tools for working wood: The processing object is wood, while 846410 processes stone. Woodworking machine tools are classified under 8465, not 8464. 847910 Other machines with independent functions: If the stone cutting machine is a robot or has independent functions, it may be classified under 8479, but usually sawing machine tools are preferentially classified under 8464. Is the processing object stone, ceramics, concrete and other mineral materials? Is the sawing method used (circular saw, band saw, gang saw)? Is a CNC device installed? CNC does not affect the subheading; it is still classified under 846410. Does it have other functions? Classify according to the main function. Can it process metal or wood? If so, confirm the main use.

Is there a difference in HS code between CNC stone cutting machines and ordinary stone cutting machines? No difference. HS code 846410 covers all machine tools for sawing stone, whether or not CNC. CNC is only a control method and does not change the processing object and process, so they are classified under the same subheading. Which HS code should water jet cutting of stone be classified under? Water jet cutting is not sawing and is usually classified under 846490 (other machine tools for working mineral materials). If the water jet equipment also has sawing function, classify according to the main function. How to classify a stone cutting machine that can cut both metal and stone? Classify according to the main use. If mainly used for cutting stone, classify under 846410; if mainly used for cutting metal, classify under 8456-8463. Proof such as processing material proportion and design use is required. Among the declaration elements for CNC stone cutting machines, which are most prone to errors? Processing material, cutting method and CNC device. Misreporting the processing material as metal or wood will lead to classification errors; misreporting the cutting method as water jet may result in classification under 846490; failure to provide the brand and model of the CNC device may affect document review. How to query the import tax rate for 846410? Through the General Administration of Customs website, single window or third-party query platforms, enter HS code 846410, select the country of origin and trade mode, and you can query the MFN rate, agreement rate, etc. Note that tax rates may change; the latest published rates shall prevail. What is the main difference between 846410 and 846420? 846410 is sawing machine tools, used for cutting; 846420 is grinding or polishing machine tools, used for surface processing. If a machine has both functions, classify according to the main function, or classify separately. What certifications should be noted when exporting CNC stone cutting machines to the EU? Attention should be paid to CE certification, including the Machinery Directive, Low Voltage Directive and Electromagnetic Compatibility Directive. In addition, a declaration of conformity, technical documents, and CE marking are required. For details, consult a professional certification body. What are the consequences of an incorrect HS code declaration during customs clearance? It may lead to customs document review failure, return of documents, supplementary tax payment, fines, and even affect the company's credit rating. It is recommended to classify in advance or apply to customs for pre-classification to ensure accurate coding.