2022 NAICS national industry in sector 31-33 Manufacturing

333611 Turbine and Turbine Generator Set Units Manufacturing

NAICS 333611 is the US industry code for turbine and turbine generator set units manufacturing. This U.S.

Code: 333611 (2022 NAICS)
Title: Turbine and Turbine Generator Set Units Manufacturing
Part of: Engine, Turbine, and Power Transmission Equipment Manufacturing
SBA small business limit: Up to 1,500 employees
Closest UK SIC: 28110 (details)

Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.

Official definition

This U.S. industry comprises establishments primarily engaged in manufacturing turbines (except aircraft); and complete turbine generator set units, such as steam, hydraulic, gas, and wind.

Source: US Census Bureau, 2022 NAICS descriptions.

When to use a different code

Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:

Manufacturing aircraft turbines are classified in U.S. Industry 336412, Aircraft Engine and Engine Parts Manufacturing.
Manufacturing generators or prime mover generator sets (except turbines) are classified in U.S. Industry 335312, Motor and Generator Manufacturing.

Source: US Census Bureau, 2022 NAICS cross-references.

Activities listed under 333611

The Census index assigns these 15 activities to this code. If your business matches one, this is your code.

Gas turbine generator set units manufacturing
Gas turbines (except aircraft) manufacturing
Generator sets, turbine (e.g., gas, hydraulic, steam), manufacturing
Governors, steam, manufacturing
Hydraulic turbine generator set units manufacturing
Hydraulic turbines manufacturing
Motor generator sets, turbo generators, manufacturing
Steam turbine generator set units manufacturing
Steam turbines manufacturing
Turbine generator set units manufacturing
Turbines (except aircraft) manufacturing
Water turbines manufacturing
Wind powered turbine generator sets manufacturing
Wind turbines (i.e., windmill) manufacturing
Windmills, electric power, generation-type, manufacturing

Source: US Census Bureau, 2022 NAICS index file.

SBA size standard for 333611

To count as a small business for SBA loans and federal contracts under NAICS 333611, your business (including affiliates) must not exceed 1,500 employees. Check your business.

Source: SBA table of size standards, effective March 17, 2023.

Closest UK SIC 2007 codes

There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 2811), so treat them as a starting point and check the definition.

28110Manufacture of engines and turbines, except aircraft, vehicle and cycle enginesUK SIC

Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.

Similar codes to compare

Data last changed November 14, 2026. How this page is built.