Unit head drilling

Unit construction machines, single station, unit head drilling

NO PGA · STANDARD CUSTOMS PROCEDURE

HSN 8457 20 20 (unit head drilling — single-station unit construction machines for working metal) is not covered by a Bureau of Indian Standards Quality Control Order and carries no Partner Government Agency clearance requirement at the tariff-line level. Import follows the standard customs procedure: Importer-Exporter Code (IEC), bill of entry, commercial invoice, packing list. Other metal-working machinery within Chapter 84 — including machining centres and multi-station transfer machines — may be classified under sibling tariff lines that carry distinct compliance obligations.

No partner government agency notification covers this tariff line.

A word of counsel

The principal risk at this tariff line is misclassification: a unit head drilling machine that also performs milling, boring, or tapping as its primary function may be re-classified by customs into a machining-centre subheading within the same heading. Re-classification on examination triggers retrospective compliance and can result in detention pending resolution. Confirm the machine's principal function and single-station configuration against the customs tariff description before filing the bill of entry.

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Frequently asked

Does HSN 8457 20 20 require any pre-import registration?

A valid Importer-Exporter Code is required for any commercial import; no product-specific registration applies to this tariff line.

What changes if the machine performs multiple metal-working operations from a single head?

A machine combining drilling with other primary functions such as milling or boring may be re-classified as a machining centre under a different subheading of heading 8457, which could attract distinct compliance obligations.

Last verified against gazette notifications: 2026-05-16. Source: BIS / DGFT / Indian Customs CUSDATA.