A machine that reduces wire diameter by drawing it through a die without removing material is classified under 846330. Machines that cut, straighten, or form wire into finished articles (such as spring-coiling machines or wire-mesh welding machines) are classified in other headings depending on their function. The key is whether the primary operation is cross-section reduction by drawing versus forming into a finished shape.

A cold-pilgering mill reduces tube diameter and wall thickness through a rocking die action rather than continuous rolling between rolls, and it works without removing material. It is generally classified under 846390 as a machine for working metal without removing material, not elsewhere specified, rather than under the rolling-mills heading, which covers mills using rotating rolls. Technical documentation describing the pilgering mechanism supports this classification.