HS Code for CNC Machining Center: 8457.10 vs 8458 vs 8459

CNC machining centers are the most common HTS 8457 imports in 2026. They represent the heaviest single-unit value among industrial machinery imports, often 200,000 to 2,000,000 USD per unit. The classification between 8457, 8458, and 8459 drives Section 301 exposure, USMCA qualification feasibility, and the choice of broker depending on the specific machine type.

This guide covers the heading scope, the distinction between machining centers and lathes, the typical tariff stack by origin, and the documentation that supports the classification.

What heading 8457 covers

HTS 8457 covers machining centers, unit construction machines (single-spindle), and multi-station transfer machines for working metal. The subheadings:

• 8457.10: Machining centers. Modern multi-tool CNC machines with automatic tool changers.
• 8457.20: Unit construction machines. Single-spindle modular machines.
• 8457.30: Multi-station transfer machines. Production transfer lines with sequential operation stations.

The vast majority of imports are 8457.10 machining centers. Subheading 8457.20 and 8457.30 cover specialized industrial production equipment.

What heading 8458 covers (lathes)

HTS 8458 covers lathes (including turning centers) for removing metal. Subheadings split by horizontal vs vertical orientation and by manual vs CNC. The most common imports are HTS 8458.11 (horizontal CNC lathes) and 8458.91 (vertical CNC lathes).

A machine where the workpiece rotates and a tool removes material is a lathe (8458). A machine where the tool rotates and the workpiece is held stationary is a milling machine or machining center (8457 or 8459).

What heading 8459 covers (drilling, milling, boring)

HTS 8459 covers machine tools (other than 8457 or 8458) for drilling, boring, milling, threading, or tapping by removing metal. These are typically simpler single-function or limited-function machines that are not full machining centers.

The 8457 vs 8459 distinction is the most common classification ambiguity. The test: does the machine have an automatic tool changer with a tool magazine permitting multiple different operations without manual intervention? Yes -> 8457.10. No -> 8459 (with subheading by function: drilling, milling, boring, etc).

Worked example: Chinese 3-axis vertical machining center

200,000 USD of Chinese-origin HTS 8457.10.00 (machining center), 3-axis vertical, automatic tool changer with 24-position magazine.

Effective rate 46.7 percent. The Chinese stack on machining centers is one of the highest among Section 301 List 1 industrial machinery lines because the MFN base is also material.

Worked example: Taiwanese 5-axis machining center

500,000 USD of Taiwanese-origin HTS 8457.10.00, 5-axis universal machining center.

Effective rate 9.5 percent. Taiwan is 37 percentage points cheaper landed than Chinese origin on the same machine type. The Taiwanese share of US machining center imports has tripled since 2018.

Worked example: German DMG Mori machining center

800,000 USD of German-origin HTS 8457.10.00, high-end 5-axis machining center.

Effective rate 11.5 percent. Germany pays the slightly higher EU Section 122 rate but is still well below Chinese stack. The German share has held up despite the price premium because the machines themselves are higher value-add (precision, automation, after-sales).

Worked example: Japanese Mazak machining center

500,000 USD of Japanese-origin HTS 8457.10.00.

Effective rate 11.5 percent. Japan and Germany are similar landed cost positions. Korean (Doosan, Hyundai Wia) machines under KORUS waive the MFN duty but still pay the 10 percent Section 122, so the landed cost gap with Japan or Germany is mostly the MFN saving (about 4.4 percentage points).

Worked example: Korean Doosan machining center

500,000 USD of Korean-origin HTS 8457.10.00.

Effective rate 10.1 percent. Korean machining centers under KORUS waive the MFN duty but pay the 10 percent Section 122 surcharge (KORUS is not in the Section 122 carve-out list). Korean machines are roughly 4 percentage points cheaper landed than comparable Japanese or German machines (the saved MFN), and 29 percentage points cheaper than Chinese.

Mexican-assembled machining centers

Mexican machine tool assembly is a growing but small share of US imports. The USMCA chapter 84 rule of origin requires tariff shift from outside 8457 plus RVC of 60 percent transaction value (or 50 percent net cost).

A Mexican machining center using a Japanese spindle, German linear guides, Chinese frame castings, Taiwanese servo motors, and Mexican labor will not qualify under tariff shift because some inputs (servo motors, spindles) may be in chapter 84 themselves. RVC test:

For a 400,000 USD machine with 280,000 USD of non-Mexican components (Japan, Germany, China, Taiwan combined): RVC = (400,000 minus 280,000) divided by 400,000 = 30 percent. Below the 60 percent threshold.

Most Mexican-assembled machining centers do not qualify under USMCA. They still benefit from Mexico-specific Section 122 suppression (0 percent), so the duty is just MFN. Effective rate 4.4 percent. Still better than Chinese 51 percent but not as competitive as Korean KORUS-qualifying 0 percent.

Documentation that supports the classification

• Machine type designation (manufacturer's data sheet specifying machining center, lathe, mill, drill, etc.).
• Automatic tool changer and magazine specification.
• Photographs showing the spindle, tool magazine, and overall machine layout.
• Origin documentation including the smelt origin of the iron casting bed (relevant for any Section 232 derivative scope check, though typically not applicable).

Run your machining center entry now

The LandedFees calculator handles HTS 8457 with the country-specific stack, the USMCA RVC test for Mexican-assembled units, and the Section 232 derivative check on cast iron content if applicable.

Calculate a machining center entry

Section 122 status as of June 20 2026

The May 7 2026 Court of International Trade ruling in Oregon v. United States (consolidated with Burlap and Barrel v. United States) struck down the Section 122 proclamation. The Federal Circuit issued an administrative stay on May 12 2026, so CBP is still collecting the duty pending appeal. Importers paying now should preserve protest rights and refund claims in case the government loses on the merits. The underlying Section 122 authority sunsets July 24 2026 under the statutory 150-day ceiling, regardless of the appeal outcome, unless Congress extends or a fresh proclamation restarts the clock.

Citations

• USITC Harmonized Tariff Schedule chapter 84: https://hts.usitc.gov/?query=8457
• USTR Section 301 List 1 covering 8457: https://ustr.gov/issue-areas/enforcement/section-301-investigations
• USMCA chapter 84 rule of origin: USMCA Annex 4-B
• KORUS tariff schedule for chapter 84: USTR FTA texts