NAICS 335312

Overview

The North American Industry Classification System (NAICS) is the federal standard for categorizing business establishments to support collection, analysis, and publication of economic statistics. NAICS was developed under the Office of Management and Budget (OMB) and adopted in 1997, in coordination with Statistics Canada and Mexico’s national statistics agency, replacing the SIC system for improved North American comparability. ¹

Under the 2022 NAICS vintage, 335312 comprises establishments primarily engaged in manufacturing electric motors (excluding internal combustion starting motors), power generators (excluding battery-charging alternators for internal combustion engines), and motor-generator sets (excluding turbine generator set units). Factory-basis armature rewinding is included within this industry. ³

What this NAICS covers

• Manufacture of AC and DC electric motors for general and specialized applications. ³
• Manufacture of standalone electric power generators (non-turbine). ³
• Manufacture of motor-generator sets and rotary converters (non-turbine). ³
• Factory-based rewinding and rebuilding of electric motor armatures. ³
• Production of electric traction motors, including for electric vehicles, when sold as motors. ³
• Integration of motors or generators into sets where the prime mover is not a turbine. ³

Related NAICS and PSC codes

Type	Code	Descriptor
NAICS	333611	Turbine and Turbine Generator Set Units Manufacturing (use for complete turbine generator set units). 3
NAICS	336322	Other Motor Vehicle Electrical and Electronic Equipment Manufacturing (use for starting motors and battery-charging alternators for internal combustion engines). 3
PSC	6105	Motors, Electrical. 5
PSC	6115	Generators and Generator Sets, Electrical. 5

Industry boundaries and cross-references

• Electric outboard motors are classified in 333618, not in 335312. ³
• Gas, steam, or hydraulic turbine generator set units fall under 333611. ³
• Starting motors and alternators for internal combustion engines are in 336322. ³
• Armature rewinding not on a factory basis is classified in 811310. ³

Small business size standard (SBA)

• The SBA small business size standard for 335312 is 1,250 employees (effective March 17, 2023). ⁴

Frequently asked questions

• What products are included in NAICS 335312?
  Electric motors, standalone electric generators (non-turbine), and motor-generator sets are included. The industry also includes factory-basis armature rewinding. It excludes turbine generator set units and motor-vehicle starting motors or alternators. ³

• Are electric vehicle traction motors covered by 335312?
  Yes. Electric motors for motor vehicles, including EV drive motors when sold as motors, are classified in 335312. Starting motors and battery-charging alternators for internal combustion engines remain in 336322. ³

• Which PSC codes commonly align with 335312 procurements?
  PSC 6105 (Motors, Electrical) and 6115 (Generators and Generator Sets, Electrical) are frequently used for products manufactured under this NAICS, reflecting the 61-series electrical equipment category. ⁵

• How does 335312 differ from 333611 and 336322?
  335312 covers motors, non-turbine generators, and motor-generator sets. 333611 covers complete turbine generator set units; 336322 covers starting motors and battery-charging alternators for internal combustion engines. ³

• What is the current small business size standard for 335312, and where is it published?
  SBA’s table lists 1,250 employees for NAICS 335312. This standard became effective March 17, 2023, and is published in the official SBA size standards table. ⁴

Useful resources

• Census NAICS: Industry description for 335312 (Manufacturing Sector 31–33 entry). ³
• Census: Implementation of the 2022 NAICS (transition timeline and overview). ²
• SBA: Table of Small Business Size Standards (effective March 17, 2023). ⁴

References

1. U.S. Census Bureau — 2017 North American Industry Classification System (NAICS) Manual (PDF). https://www.census.gov/naics/reference_files_tools/2017_NAICS_Manual.pdf
2. U.S. Census Bureau — The Census Bureau’s Implementation of the 2022 NAICS. https://www.census.gov/programs-surveys/economic-census/guidance/naics-changes/2022.html
3. U.S. Census Bureau — NAICS 2022 Industry Definition for 335312 Motor and Generator Manufacturing. https://www.census.gov/naics/?input=335312&year=2022&details=335312
4. U.S. Small Business Administration — Table of Small Business Size Standards. https://www.sba.gov/document/support--table-size-standards
5. U.S. General Services Administration — Product and Service Codes (PSC) Manual. https://www.acquisition.gov/psc-manual