Thread-rolling machines

Subheading 846320 of the Combined Nomenclature covers thread rolling machines, which are machines for producing threads on bars, bolts, and cylindrical elements by plastic forming. Thread rolling machines form threads by rolling material between flat dies or cylindrical rolls with thread profiles without removing material. This subheading includes flat die thread rollers, cylindrical die thread rollers, and planetary thread rollers. Classification is based on the Notes to Chapter 84 CN and heading 8463, covering other machine tools for working metal without removing material. The key criterion is thread production by plastic forming (rolling) rather than by cutting. Thread cutting machines are classified under heading 8461. Classification follows the General Rules for the Interpretation of the CN. Where doubt exists, a BTI ruling should be sought.

Importing thread rolling machines under subheading 846320 into the EU is subject to the Union Customs Code (Regulation (EU) No 952/2013) and the Machinery Regulation (EU) 2023/1230. Thread rollers must bear the CE marking, have an EU declaration of conformity, and include operating instructions in the official language of the destination country. Importers must hold an EORI number and file a customs declaration with the correct CN code. Import documentation includes the commercial invoice, machine technical specification, transport documents, and proof of origin for preferential rates. Electrically powered thread rolling machines are subject to the LVD Directive 2014/35/EU and the EMC Directive 2014/30/EU. Machines must be equipped with hazard zone guards and emergency stops per safety requirements. MFN duty rates and trade measures should be verified in TARIC before importing.

Thread rolling machines under subheading 846320 are used in the fastener, automotive, aerospace, and mechanical engineering industries. They serve for producing threads on bolts, screws, threaded rods, and drive elements. Rolled threads have higher strength than cut threads because metal fibres are shaped rather than severed during the forming process. Rolling is also faster and more material-efficient than cutting. Modern thread rolling machines achieve high production speeds and can produce metric, imperial, and special threads. For customs classification, it is important to distinguish thread rolling machines (846320) from thread cutting machines (heading 8461), which produce threads by machining. Rolling machines form threads plastically without chip removal. Correct classification requires analysis of the machine operating principle based on manufacturer documentation. Importers should verify duty rates in TARIC.

Thread rolling machines under CN 8463 20 cover specialist metal-working machines not falling under headings 8456-8462. Classification requires precise identification of the technological process - thread rolling, wire drawing, bar straightening and profile bending. Wire and bar drawing machines are classified under 8463, not 8462 (stamping). EN ISO 16092 series standards set safety requirements. The Machinery Regulation (EU) 2023/1230 mandates CE marking.