Analysis
NAICS 333131 is the 2022 national industry for mining machinery and equipment manufacturing, part of 33313 (Mining and Oil and Gas Field Machinery Manufacturing). Census lists 33 example activities under it in the official index.
County Business Patterns counts 266 US establishments in this code in 2023, employing 10,391 people at an average annual payroll of $80,244 per employee (69th percentile of national industries). 25% of the establishments have fewer than five employees, which points to larger operations.
By establishments it ranks 2nd of the 2 codes at this level within Mining and Oil and Gas Field Machinery Manufacturing, with 30% of them.
Its index entries, the activities Census uses to assign businesses to this code, include amalgamators (i.e., metallurgical and mining machinery)…, augers, mining-type, manufacturing, bits, rock drill, underground mining-type, manufacturing and breakers, coal, manufacturing, among 33 in all.
Its goods appear in 22 statistical lines of the US tariff schedule, mostly under headings 8207 (interchangeable tools for handtools, whether or not power…), 8430 (other moving, grading, leveling, scraping, excavating…) and 8474 (machinery for sorting, screening, separating, washing…). That link is how import data is matched to domestic producers, for example in trade-remedy cases.
Census lists 4 related activities that belong elsewhere, most often in 333120, 333132, 333922 and 336510. Businesses that do several things are classified by their primary activity, the one that generates the most value, so check those boundaries before settling on this code.
Official definition
This U.S. industry comprises establishments primarily engaged in (1) manufacturing underground mining machinery and equipment, such as coal breakers, mining cars, core drills, coal cutters, and rock drills, and (2) manufacturing mineral beneficiating machinery and equipment used in surface or underground mines.
Source: US Census Bureau, NAICS 2022 Manual.
Not this code if…
| The business mainly does | Use instead |
|---|---|
| Manufacturing surface mining machinery and equipment | 333120 Construction Machinery Manufacturing |
| Manufacturing well drilling machinery | 333132 Oil and Gas Field Machinery and Equipment Manufacturing |
| Manufacturing coal and ore conveyors | 333922 Conveyor and Conveying Equipment Manufacturing |
| Manufacturing underground mining locomotives | 336510 Railroad Rolling Stock Manufacturing |
Index entries (33)
- Amalgamators (i.e., metallurgical and mining machinery) manufacturing
- Augers, mining-type, manufacturing
- Bits, rock drill, underground mining-type, manufacturing
- Breakers, coal, manufacturing
- Cars, mining, manufacturing
- Cleaning machinery, mining-type, manufacturing
- Coal breakers, cutters, and pulverizers manufacturing
- Concentration machinery, mining-type, manufacturing
- Core drills, underground mining-type, manufacturing
- Crushing machinery, stationary, manufacturing
- Cutters, coal, manufacturing
- Drilling equipment, underground mining-type, manufacturing
- Drills, core, underground mining-type, manufacturing
- Drills, rock, underground mining-type, manufacturing
- Dumpers, mining car, manufacturing
- Feeders, mineral beneficiating-type, manufacturing
- Flotation machinery, mining-type, manufacturing
- Hammer mill machinery (i.e., rock and ore crushing machines), stationary, manufacturing
- Loading machines, underground mining, manufacturing
- Mineral processing and beneficiating machinery manufacturing
- Mining cars manufacturing
- Ore crushing, washing, screening, and loading machinery manufacturing
- Pellet mills machinery, mining-type, manufacturing
- Quarrying machinery and equipment manufacturing
- Rock crushing machinery, stationary, manufacturing
- Rock drills, underground mining-type, manufacturing
- Scraper loaders, underground mining-type, manufacturing
- Screening machinery, stationary, manufacturing
- Sedimentary mineral machinery manufacturing
- Sieves and screening equipment, mineral beneficiating, manufacturing
- Stone beneficiating machinery manufacturing
- Underground mining machinery manufacturing
- Washers, aggregate and sand, stationary, manufacturing