NAICS 335312 Quarterly Industry Report
Motor and Generator Manufacturing
Comprehensive industry research for valuation professionals, business owners, buyers, and lenders
NAICS Code: 335312Sector: 33Updated: Q1 2026
About This Report
This Fair Market Value industry report for NAICS 335312 draws on verified data from the U.S. Census Bureau[5], Bureau of Labor Statistics[7], and the Small Business Administration[8]. Our research team compiles establishment counts, employment data, and SBA eligibility criteria specific to motor and generator manufacturing. Reports are updated quarterly to reflect new Census releases and regulatory changes.
Industry Snapshot
Key metrics for the motor and generator manufacturing industry.
Industry Definition & Overview
Motor and Generator Manufacturing (NAICS 335312) encompasses 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). Products include fractional horsepower motors for appliances and HVAC systems, integral horsepower motors for industrial machinery, standby power generators for commercial buildings, and portable generators for construction sites. The U.S. Census Bureau[5] classifies this industry under electrical equipment manufacturing.
Roughly 730 active businesses employ an estimated 29,200 workers across approximately 392 establishments per Census data[6]. Production segments by motor size and application: fractional horsepower motors (below 1 HP) serve appliance and HVAC original equipment manufacturers, while integral horsepower motors (1 HP and above) power industrial pumps, compressors, conveyors, and machine tools. Generator manufacturing ranges from small portable units rated under 15 kW to large industrial standby systems rated above 2 MW.
Raw materials include copper wire for motor windings, electrical steel laminations for stator and rotor cores, permanent magnets for brushless designs, and cast iron or aluminum for motor frames. Energy efficiency regulations under NEMA premium efficiency standards and Department of Energy mandates drive continuous product redesign, particularly for three-phase industrial motors where operating cost savings from higher efficiency grades justify premium pricing. Variable frequency drive compatibility has become a standard design requirement as industrial customers adopt electronic speed control to reduce energy consumption in pump and fan applications.
What's Included in This Industry
- Fractional horsepower electric motor manufacturing
- Integral horsepower industrial motor production
- Standby power generator manufacturing
- Portable generator production for construction and emergency use
- Motor generator set assembly
- Brushless DC motor manufacturing
- Explosion-proof motor production for hazardous environments
- Submersible motor manufacturing for pump applications
- Synchronous and induction motor production
- Permanent magnet motor manufacturing
NAICS Classification Hierarchy
| Level | Description | Code |
|---|---|---|
| Subsector | Electrical Equipment, Appliance, and Component Manufacturing | 335 |
| Industry Group | Electrical Equipment Manufacturing | 3353 |
| NAICS Industry | Electrical Equipment Manufacturing | 33531 |
| National Industry | Motor and Generator Manufacturing | 335312 |
Related NAICS Codes
| Code | Description | Relationship |
|---|---|---|
| 335311 | Power, Distribution, and Specialty Transformer Manufacturing | Manufactures power and distribution transformers that change voltage levels rather than the electric motors and generators that convert between electrical and mechanical energy |
| 335313 | Switchgear and Switchboard Apparatus Manufacturing | Produces switchgear and switchboard apparatus for electrical circuit protection and control rather than the motors and generators that produce or consume electrical power |
| 335314 | Relay and Industrial Control Manufacturing | Manufactures relays, motor starters, and industrial controls that regulate motor operation rather than the motors and generators themselves produced in this classification |
| 336320 | Motor Vehicle Electrical and Electronic Equipment Manufacturing | Produces motor vehicle electrical equipment including starting motors and alternators classified separately from the industrial and commercial motors manufactured here |
| 333611 | Turbine and Turbine Generator Set Units Manufacturing | Manufactures turbine generator sets powered by steam or gas turbines classified separately from the non-turbine motor generator sets produced in this industry |
| 335210 | Small Electrical Appliance Manufacturing | Manufactures small electric household appliances that incorporate fractional horsepower motors but classifies as a consumer product industry rather than motor manufacturing |
Geographic Concentration
Top states by share of national establishments.
| # | State | % Est. | Total Est. |
|---|---|---|---|
| 1 | California | 12.1% | 47 |
| 2 | Texas | 10.1% | 39 |
| 3 | Wisconsin | 5.4% | 21 |
| 4 | Florida | 5.2% | 20 |
| 5 | Illinois | 5.2% | 20 |
| 6 | Ohio | 5.2% | 20 |
| 7 | New York | 4.4% | 17 |
| 8 | Michigan | 4.1% | 16 |
| 9 | Missouri | 4.1% | 16 |
| 10 | Indiana | 4.1% | 16 |
% Of Establishments
0%
12%
Source: County Business Patterns, U.S. Census Bureau[3]
SBA Lending Summary
48
Total SBA Loans
$44.9M
Total Loan Volume
$936K
Average Loan Size
10 yrs
Average Loan Term
10.38%
Average Interest Rate
576
Jobs Supported
Source: SBA 7(a) Program Data, U.S. Small Business Administration — FY 2025[4]
Key Insight: The SBA[8] sets the size standard for NAICS 335312 at 1,500 employees. Firms below this threshold qualify for small business set-aside contracts and SBA-backed lending programs. Federal procurement includes standby generators for military installations, explosion-proof motors for Navy shipboard systems, and portable generators for disaster relief operations through FEMA supply contracts. The SBA's contracting programs[9] support manufacturers pursuing Defense Logistics Agency motor and generator supply contracts. Eligible businesses can access SBA 7(a) loans[10] for working capital, equipment, and acquisition financing, while 504 loans[11] support major fixed-asset purchases including real estate and heavy machinery.
Top SBA Lenders
| # | Lender | Loans | Volume | Avg Loan |
|---|---|---|---|---|
| 1 | First National Bank of Michigan | 8 | $39.4M | $4.9M |
| 2 | Readycap Lending, LLC | 8 | $3.0M | $380K |
| 3 | Northeast Bank | 24 | $2.4M | $100K |
| 4 | Wells Fargo Bank National Association | 8 | $120K | $15K |
Frequently Asked Questions
Common questions about this industry.
What types of businesses are classified under NAICS 335312?
Manufacturers of electric motors, power generators, and motor generator sets classify here. Products include fractional and integral horsepower motors, portable and standby generators, brushless DC motors, explosion-proof motors, and submersible pump motors per the Census Bureau[5] classification.
How is the motor and generator manufacturing industry structured?
Roughly 730 businesses employ an estimated 29,200 workers across approximately 392 establishments per Census data[6]. Large manufacturers dominate integral horsepower motor production while numerous smaller firms serve specialty niches including explosion-proof designs, custom-wound motors, and portable generator assembly.
What is the SBA size standard for NAICS 335312?
The SBA[8] sets the threshold at 1,500 employees. Businesses with fewer than 1,500 average employees qualify as small for federal contracting preferences and SBA-backed financing programs including 7(a) and 504 loans.
What NAICS codes are related to motor and generator manufacturing?
Related codes include 335311 (Transformers), 335313 (Switchgear), 335314 (Relays and Controls), 336320 (Vehicle Electrical Equipment), 333611 (Turbine Generators), and 335210 (Small Appliances). Each covers electrical products distinguished from the industrial motors and non-turbine generators in this code.
What industries purchase motors and generators?
Industrial pump manufacturers, electrical contractors, HVAC equipment producers, and steel mills interact most directly. Pump and compressor applications consume the largest share of integral horsepower motors while HVAC manufacturers purchase fractional horsepower units for residential and commercial climate systems.
What activities are included in NAICS 335312?
Activities include manufacturing fractional and integral horsepower electric motors, producing portable and standby power generators, assembling motor generator sets, winding armatures and stators, fabricating explosion-proof motor enclosures, manufacturing submersible pump motors, and producing brushless DC and permanent magnet motors for industrial automation applications.
Can motor and generator manufacturers qualify for SBA loans?
Yes, firms below 1,500 employees qualify for SBA lending programs[9] including 7(a) and 504 loans. Winding machines, die casting equipment, dynamic balancing systems, and motor testing apparatus represent capital investments suited to SBA 504 equipment financing.
Where are motor and generator manufacturers concentrated?
Production concentrates in the Midwest and Southeast, with clusters in Wisconsin, Ohio, Indiana, and Texas near industrial customer bases and copper wire suppliers. Generator manufacturing operations locate near transportation hubs for shipping heavy equipment. Several global motor manufacturers maintain U.S. production facilities to serve domestic OEM customers requiring just-in-time delivery and local technical support.
Sources & References
Government datasets and editorial sources used in this report.
- [1]U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages bls.gov
- [2]U.S. Census Bureau, Economic Census census.gov
- [3]U.S. Census Bureau, County Business Patterns census.gov
- [4]U.S. Small Business Administration, SBA 7(a) Loan Program Data data.sba.gov
- [5]U.S. Census Bureau census.gov
- [6]Census data naicslist.com
- [7]Bureau of Labor Statistics bls.gov
- [8]Small Business Administration sba.gov
- [9]SBA's contracting programs sba.gov
- [10]SBA 7(a) loans sba.gov
- [11]504 loans sba.gov
Disclaimer
This publication has been prepared by Fair Market Value (“Fair Market Value”) for informational purposes only. It is provided on an “as-is” and “as available” basis. Fair Market Value makes no representations or warranties, express or implied, regarding the merchantability, fitness for a particular purpose, completeness, or accuracy of the data or information contained herein. This publication is not intended to be, and should not be construed as, professional financial, legal, tax, or investment advice. Users should consult with qualified professionals before making any financial or business decisions based on the information presented.
To the extent permitted by law, Fair Market Value disclaims all liability for loss or damage, direct and indirect, suffered or incurred by any person resulting from the use of, or reliance upon, the data in this publication.
Copyright © 2026 Fair Market Value. All rights reserved. All data, information, articles, graphs, and content contained in this publication are copyrighted works and Fair Market Value hereby reserves all rights. No part of this publication may be copied, reproduced, republished, uploaded to a third party, or distributed without the prior written permission of Fair Market Value.