335312 — Motor and Generator Manufacturing
Description
This U.S. industry comprises establishments primarily engaged in manufacturing electric motors (except internal combustion engine starting motors), power generators (except battery charging alternators for internal combustion engines), and motor generator sets (except turbine generator set units). This industry includes establishments rewinding armatures on a factory basis (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Exclusions & Cross-References
- Manufacturing electric outboard motors--are classified in U.S. Industry 333618, Other Engine Equipment
- Manufacturing;
- Manufacturing gas, steam, or hydraulic turbine generator set units--are classified in U.S. Industry 333611,
- Turbine and Turbine Generator Set Units Manufacturing;
- Manufacturing starting motors and battery charging alternators for internal combustion engines--are
- classified in Industry 336320, Motor Vehicle Electrical and Electronic Equipment Manufacturing;
- Rewinding armatures, not on a factory basis--are classified in Industry 811310, Commercial and Industrial
- Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance; and
- Manufacturing welding and soldering equipment (except handheld soldering irons)--are classified in U.S.
- Industry 333992, Welding and Soldering Equipment Manufacturing.
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 3621 - Motors and Generators (via SIC1987:3621→NAICS1997:335312→2002:335312→2007:335312→2012:335312→2017:335312→2022:335312)
- SIC 7694 - Armature Rewinding Shops (via SIC1987:7694→NAICS1997:335312→2002:335312→2007:335312→2012:335312→2017:335312→2022:335312)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC 5990 — Synchros and Resolvers
- PSC 6105 — Motors, Electrical
- PSC 6110 — Electrical Control Equipment
- PSC 6115 — Generators and Generator Sets, Electrical
- PSC 6125 — Converters, Electrical, Rotating
- PSC 6620 — Engine Instruments
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 335312 valid in 2022? ▾
Yes, 335312 is a valid 6-digit 2022 NAICS national industry code representing 'Motor and Generator Manufacturing' under Sector 31-33 in the official classification index.
What is the SBA size standard for NAICS code 335312? ▾
The Small Business Administration (SBA) has established a small business size standard of 1,250 employees for NAICS code 335312 (Motor and Generator Manufacturing), calculated based on employees.
What is the legacy SIC equivalent for NAICS 335312? ▾
According to official Census Bureau concordance tables, NAICS code 335312 (Motor and Generator Manufacturing) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 3621 - Motors and Generators, 7694 - Armature Rewinding Shops.
Related Pages & Tools
Further regulatory reference links for NAICS code 335312:
- Sector 31-33 Directory Hub — List of related industries in the Manufacturing sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 335312 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Motor and Generator Manufacturing).
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.