NAICS 333517

Overview

The North American Industry Classification System (NAICS) is the governmentwide standard for grouping business establishments so statistical agencies can collect, analyze, and publish data on the U.S. economy. Developed under the Office of Management and Budget and adopted in 1997 to replace SIC, the current Census publication vintage is 2022. NAICS is jointly maintained by the U.S., Canada, and Mexico to keep data comparable across North America. ¹

NAICS 333517 — Machine Tool Manufacturing — classifies establishments primarily engaged in producing machine tools used for metalworking. Within Manufacturing (31–33), machine tool activity sits in the metalworking machinery family that encompasses metal-cutting and metal-forming machine tools, as specified in the official 2022 NAICS structure. ³

• See also on G2X:
  • G2X — NAICS 333517 overview
  • G2X — NAICS 333515 Cutting Tool and Machine Tool Accessory Manufacturing
  • G2X — NAICS 333519 Rolling Mill and Other Metalworking Machinery Manufacturing

What this NAICS covers

• Manufacture of metal-cutting machine tools such as lathes, milling machines, boring machines, drilling machines, and grinding machines. ³
• Manufacture of metal-forming machine tools including punching, shearing, bending, pressing, forging, and die-casting machines. ³
• Production of shop/plant metalworking polishing and buffing machines as part of metal-cutting tool systems. ³
• Production of home workshop metalworking machine tools (non-handtools). ³
• Integrated machine tool systems intended to shape or form metal workpieces in industrial applications. ³
• Machine tool manufacturing as part of the 2022 NAICS structure used in current Census economic data releases. ²

Related NAICS and PSC codes

Type	Code	Descriptor
NAICS	333515	Cutting Tool and Machine Tool Accessory Manufacturing
NAICS	333519	Rolling Mill and Other Metalworking Machinery Manufacturing
PSC	3405	Saws and Filing Machines
PSC	3410	Electrical and Ultrasonic Erosion Machines

Inclusions and exclusions (official cross-references)

• Excludes welding and soldering equipment; those products fall under NAICS 333992. ³
• Excludes power-driven metal-cutting handtools, which are classified in NAICS 333991. ³
• Excludes cutting tools and machine tool accessories, which are classified in NAICS 333515. ³
• Excludes rolling mill machinery and equipment, classified in NAICS 333519. ³

Frequently asked questions

• What changed with NAICS 333517 in the 2022 update?

  • The 2022 NAICS vintage introduced select consolidations and title updates across sectors. Machine tool manufacturing continues under NAICS 333517 in 2022-based Census publications, aligned to the implementation timeline for the 2022 Economic Census. ²

• What products are included under NAICS 333517?

  • Establishments manufacturing metalworking machine tools are included, such as metal-cutting lathes, mills, drills, grinders, and metal-forming presses and related equipment, consistent with the official 2022 NAICS description. ³

• Are cutting tools themselves included in NAICS 333517?

  • No. Cutting tools (e.g., end mills, drills, inserts) and machine tool accessories are classified in NAICS 333515, not in machine tool manufacturing. ³

• Do government buys of machine tools map to specific PSC codes?

  • Yes. For product buys, agencies commonly code under Federal Supply Group 34 for metalworking machinery, including PSC 3405 (Saws and Filing Machines) and PSC 3410 (Electrical and Ultrasonic Erosion Machines). Refer to the PSC Manual for the full list. ⁴

• Where can the official title for NAICS 333517 be confirmed?

  • The official 2022 NAICS page lists the title “Machine Tool Manufacturing” for NAICS 333517 and provides scope and cross-references. ³

Useful resources

• G2X — NAICS 333517 overview
• Economic Census: NAICS Codes & Understanding Industry Classification Systems. ¹
• The Census Bureau’s Implementation of the 2022 NAICS (timeline, concordance, and releases). ²
• 2022 NAICS 333517 official description and cross-references. ³
• PSC Manual (product/service code definitions used in federal procurement). ⁴
• Industry Reference Files: 2022 NAICS Descriptions index. ⁵

References

1. U.S. Census Bureau — Economic Census: NAICS Codes & Understanding Industry Classification Systems. https://www.census.gov/programs-surveys/economic-census/year/2022/technical-documentation/code-lists/understanding-naics-redirect.html
2. U.S. Census Bureau — The Census Bureau’s Implementation of the 2022 NAICS. https://www.census.gov/library/reference/code-lists/naics/2022/implementation-timeline.html
3. U.S. Census Bureau — 2022 NAICS 333517: Machine Tool Manufacturing (official details and cross-references). https://www.census.gov/naics/?input=333517&year=2022&details=333517
4. General Services Administration — Product and Service Code (PSC) Manual (April 2025). https://www.acquisition.gov/sites/default/files/manual/PSC%20Manual%20April%202025.pdf
5. U.S. Census Bureau — Industry Reference Files: 2022 NAICS Descriptions index. https://www.census.gov/programs-surveys/nonemployer-statistics/technical-documentation/reference/naics-descriptions.html