335312 - Motor and Generator Manufacturing

Introduction

In the diverse world of manufacturing, NAICS code 335312 stands out as a vital industry classification for businesses involved in the production of motors and generators. This sector powers countless applications—from industrial machinery and transportation to power generation—making it essential for a wide range of economic activities. Whether you are a manufacturer, supplier, or contractor exploring government contracting opportunities, understanding NAICS 335312 is key to navigating this specialized field successfully.

What is NAICS Code 335312?

NAICS code 335312 corresponds to the Motor and Generator Manufacturing industry. This code covers establishments primarily engaged in the manufacturing of:

• Motors (including fractional and integral horsepower motors)
• Generators
• Motor generator sets

These products serve diverse functions across various sectors, such as industrial manufacturing, transportation systems, and power generation facilities.

Sector and Typical Business Activities

• Sector: Manufacturing
• Typical Business Activities:
  • Manufacturing electric motors and generators
  • Producing motor generator sets
  • Fabricating electrical components specific to motors and generators, including armatures, rotors, and slip rings
  • Designing and assembling power generators and frequency converters

Size Standards for Eligibility

Businesses classified under NAICS 335312 are considered to be small if they have 1,250 or fewer employees. This size standard is critical for companies seeking government contracts and small business certifications within the motor and generator manufacturing industry.

Examples of Businesses Under NAICS 335312

• Electric motor manufacturers producing various motor types such as servo, torque, and synchronous motors
• Generator manufacturers specializing in power generators and prime mover generator sets
• Companies assembling motor generator sets for industrial or transportation use

Detailed Code Descriptions for NAICS 335312

Code Detail Description	Included Activities
Armature rewinding on a factory basis	Rewinding armatures for electric motors and generators
Armatures, industrial, manufacturing	Production of armatures for industrial motors
Coils for motors and generators manufacturing	Manufacturing coils used in electrical motors and generators
Collector rings for motors and generators manufacturing	Producing collector rings essential for motor operation
Commutators, electric motor, manufacturing	Fabricating commutators for electric motors
Condensers, synchronous, electric, manufacturing	Making synchronous condensers used in electrical equipment
Converters, phase and rotary, electrical equipment	Manufacturing phase and rotary converters
Dynamos, electric (except automotive), manufacturing	Producing electric dynamos excluding automotive types
Dynamotors manufacturing	Manufacturing dynamotors combining motor and generator
Exciter assemblies, motor and generator, manufacturing	Assembling exciters for motors and generators
Fractional horsepower electric motors manufacturing	Producing small electric motors with fractional horsepower
Frequency converters manufacturing	Manufacturing electric frequency converters (generators)
Generating apparatus and parts, electrical (except IC engine/welding)	Producing parts related to electrical generating systems
Generator sets, prime mover (except turbine generator sets)	Manufacturing generator sets with prime movers except turbines
Generators and sets, electric (except IC engine, welding, turbine generator sets)	Producing electric generators and sets excluding specific types
Generators for gas-electric and oil-electric vehicles	Manufacture of generators for hybrid vehicles
Generators for storage battery chargers (except IC engine/aircraft)	Producing generators used in battery chargers
Ground Power Units (GPU) manufacturing	Manufacturing ground power units for aircraft and other applications
Integral horsepower electric motors manufacturing	Producing motors with integral horsepower rating
Inverters, rotating electrical, manufacturing	Fabricating rotating electrical inverters
Land transportation motors and generators manufacturing	Manufacturing motors and generators used in transportation
Motor generator sets (except automotive, turbine generator sets)	Producing motor generator sets excluding automotive types
Motors, electric (except engine starting motors, gearmotors, outboard), manufacturing	Manufacturing general electric motors
Phase converters (electrical equipment) manufacturing	Producing electrical phase converters
Power generators manufacturing	General manufacturing of power generators
Prime mover generator sets (except turbine generator sets) manufacturing	Assembly of generator sets with prime movers (excluding turbines)
Railway motors and control equipment, electric, manufacturing	Manufacturing electric motors and control equipment for railways
Resolvers manufacturing	Producing resolvers for motor control and feedback
Rotor retainers and housings manufacturing	Manufacturing rotor retainers and housing parts
Rotors (for motors) manufacturing	Fabricating rotors used in electric motors
Servomotors manufacturing	Manufacturing servomotors used in precise motion control
Slip rings for motors and generators manufacturing	Producing slip rings that conduct current on moving parts
Stators for motors manufacturing	Manufacturing stators for electric motors
Storage battery chargers (except IC engine-type) manufacturing	Producing battery chargers excluding internal combustion types
Synchronous condensers and timing motors, electric, manufacturing	Manufacturing condensers and motors for synchronization
Synchronous motors manufacturing	Producing synchronous motors
Timing motors, synchronous, electric, manufacturing	Manufacturing electric timing motors
Torque motors, electric, manufacturing	Producing electric motors designed for torque applications

FAQ - NAICS Code 335312

Q: What types of products are covered under NAICS 335312?

A: This code covers the manufacturing of electric motors, generators, motor generator sets, and their related components.

Q: Is NAICS 335312 applicable to automotive motor manufacturing?

A: No, automotive-specific motors and generators are generally classified under different NAICS codes.

Q: What is the employee size standard for small businesses in this industry?

A: Businesses with up to 1,250 employees qualify as small for NAICS 335312.

Q: Can companies that rewind armatures be classified under this code?

A: Yes, armature rewinding on a factory basis is included in NAICS 335312.

Q: Are manufacturers of power inverters included?

A: Yes, manufacturers producing rotating electrical inverters fall under this NAICS code.

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By understanding the scope and detailed components of NAICS code 335312 - Motor and Generator Manufacturing, businesses can better position themselves for growth, government contracting, and industry collaboration. Whether you specialize in small fractional horsepower motors or large industrial generator sets, this classification provides a clear roadmap for your manufacturing identity.