2022 NAICS national industry in sector 81 Other Services (except Public Administration)

811310 Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance

NAICS 811310 is the US industry code for commercial and industrial machinery and equipment (except automotive and electronic) repair and maintenance. It covers establishments primarily engaged in the repair and maintenance of commercial and industrial machinery and equipment.

Code: 811310 (2022 NAICS)
Title: Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
Part of: Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
SBA small business limit: Average annual receipts up to $12.5 million
Closest UK SIC: 33110, 33120, 33130, 33140 and 5 more (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 industry comprises establishments primarily engaged in the repair and maintenance of commercial and industrial machinery and equipment. Establishments in this industry either sharpen/install commercial and industrial machinery blades and saws or provide welding (e.g., automotive, general) repair services; or repair agricultural and other heavy and industrial machinery and equipment (e.g., forklifts and other material handling equipment, machine tools, commercial refrigeration equipment, construction equipment, and mining machinery).

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:

Automotive repair (except welding) and maintenance are classified in Industry Group 8111, Automotive Repair and Maintenance.
Repairing and maintaining electronic and precision equipment are classified in Industry 811210, Electronic and Precision Equipment Repair and Maintenance.
Oil well rig building, repairing, and dismantling, on a contract basis are classified in U.S. Industry 213112, Support Activities for Oil and Gas Operations.
On-site welding for building foundations and structures are classified in Industry 238190, Other Foundation, Structure, and Building Exterior Contractors.
Oil and gas pipeline and related structures construction and repair are classified in Industry 237120, Oil and Gas Pipeline and Related Structures Construction.
Repairing and servicing aircraft are classified in Industry 488190, Other Support Activities for Air Transportation.
Converting, rebuilding, and overhauling aircraft are classified in Industry 33641, Aerospace Product and Parts Manufacturing.
Repairing and servicing railroad cars and engines are classified in Industry 488210, Support Activities for Rail Transportation.
Rebuilding or remanufacturing railroad engines and cars are classified in Industry 336510, Railroad Rolling Stock Manufacturing.
Repairing and overhauling ships at floating drydocks are classified in Industry 488390, Other Support Activities for Water Transportation.
Repairing and overhauling ships at shipyards are classified in U.S. Industry 336611, Ship Building and Repairing.
Rewinding armatures or rebuilding electric motors on a factory basis are classified in U.S. Industry 335312, Motor and Generator Manufacturing.
Repairing and maintaining home and garden equipment (e.g., sharpening or installing blades and saws) are classified in U.S. Industry 811411, Home and Garden Equipment Repair and Maintenance.

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

Activities listed under 811310

The Census index assigns these 41 activities to this code. If your business matches one, this is your code.

Agricultural machinery and equipment repair and maintenance services
Armature rewinding services (except on an assembly line or factory basis)
Blade sharpening, commercial and industrial machinery and equipment
Cargo container repair and maintenance services
Coil rewinding (except on an assembly line or factory basis)
Commercial and industrial machinery repair and maintenance services
Commercial gaming machine repair and maintenance services
Commercial refrigeration equipment repair and maintenance services
Construction machinery and equipment repair and maintenance services
Electric motor repair and maintenance services, commercial or industrial
Electrical generating and transmission equipment repair and maintenance services
Engine repair (except automotive, small engine)
Farm machinery and equipment repair and maintenance services
Fire extinguisher repair and maintenance, without installation
Food machinery repair and maintenance services
Forestry machinery and equipment repair and maintenance services
Forklift repair and maintenance services
Foundry machinery and equipment repair and maintenance services
Freezer, commercial, repair and maintenance services
Heavy machinery and equipment repair and maintenance services
Hydraulic equipment repair and maintenance services
Industrial equipment and machinery repair and maintenance services
Industrial truck (e.g., forklifts) repair and maintenance services
Machine tools repair and maintenance services
Material handling equipment repair and maintenance services
Mechanical power transmission equipment repair and maintenance services
Mining machinery and equipment repair and maintenance services
Motor repair and maintenance services, commercial or industrial
Oil and gas field machinery and equipment repair and maintenance services
Paper making machinery repair and maintenance services
Printing trade machinery repair and maintenance services
Reconditioning shipping barrels and drums
Refrigeration equipment repair and maintenance services, industrial and commercial-type
Restaurant fryer equipment cleaning services
Rewinding armatures (except on an assembly line or factory basis)
Service machinery and equipment repair and maintenance services
Textile machinery repair and maintenance services
Tractor, farm or construction equipment repair and maintenance services
Truck refrigeration repair and maintenance services
Waterless fire suppression system repair and maintenance, without installation
Welding repair services (e.g., automotive, general)

Source: US Census Bureau, 2022 NAICS index file.

SBA size standard for 811310

To count as a small business for SBA loans and federal contracts under NAICS 811310, your business (including affiliates) must not exceed $12.5 million in average annual receipts. 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: 3311, 3312, 3313, 3314, 3315, 3319, 4520, 8129), so treat them as a starting point and check the definition.

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

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