# NAICS 333131: Mining Machinery and Equipment Manufacturing

The SBA size standard for NAICS 333131 is 900 employees (13 CFR 121.201).

| Field | Value |
| --- | --- |
| Code | 333131 |
| Title | Mining Machinery and Equipment Manufacturing |
| Level | 6 |
| Parent | 33313 |
| Size standard | 900 employees |
| Footnote | - |

## Description

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.

## Sources

- Census NAICS: https://www.census.gov/naics/
- SBA size standards: https://www.sba.gov/document/support-table-size-standards

## API and MCP

- REST: GET https://samgovapi.io/api/v1/naics/333131/size-standard?revenue_usd=...
- MCP tools: naics_lookup, size_standard_check

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