U.S. imports of Dividing Heads and Special Attachments for Machine Tools (SITC 73515) totaled $8.8M in August 2026, imported from 43 countries.
Importers of Dividing Heads and Special Attachments for Machine Tools paid $1.1M in duties in August 2026, an average duty rate of 12.51% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataDividing heads — also called indexing heads — enable precise angular positioning of a workpiece on a milling machine, making them indispensable for cutting gears, splines, and evenly spaced features. This heading also captures other specialized machine-tool attachments such as rotary tables, angle plates, and milling attachments that extend a machine's capability beyond its standard configuration. The precision and repeatability specifications of these attachments are closely tied to the accuracy grade of the host machine, making specification matching a key procurement consideration.
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534 import shipments a month
A dividing head is designed primarily for indexing a workpiece to precise angular positions for gear-cutting and similar operations, typically mounted between centers. A rotary table provides continuous or indexed rotation, often used for circular milling and drilling. Both fall under SITC 73515 as special attachments for machine tools, though at the HTS 10-digit level they may be distinguished by type.
CBP looks to the attachment's design, marketing materials, and technical specifications to determine principal use. Manufacturer catalogs, technical drawings showing the machine-tool interface, and commercial invoices describing the attachment's function are the standard supporting documents. If the attachment has plausible non-machine-tool uses, a binding ruling from CBP before importation provides the most reliable classification certainty.
Basic heading 426 of 642 in section 7
Basic heading 73515 · $8.8M of $172.0B
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Imports · August 2026
origin
Japan pays 12.7% duty; Canada 0.2%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$8.8MYoY · free account
Exports
$10.0MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $104.9M of Dividing Heads and Special Attachments for Machine Tools.
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.