Federal NAICS Codes

NAICS 333131

Mining Machinery and Equipment Manufacturing

Explore obligations, trends, recent awards, and incumbent contractors for NAICS 333131.

NAICS 333131 federal market metrics

Total obligations
$115.7M
Total awards
2,191 awards
Active obligations
$305.4K
Size standard
900 employees

What this NAICS covers

NAICS 333131 covers manufacture of machinery and equipment used in mining, such as crushers, conveyors, underground continuous miners, drilling rigs, and ore handling systems fabricated to engineering specifications.

Federal opportunities under 333131 typically involve producing heavy mining equipment, fabricating structural assemblies, supplying wear parts, performing factory assembly, and supporting factory acceptance testing per equipment performance curves.

FY2025 snapshot

Obligations
$230.1K
Awards
18
Average award
$12.8K
Change from FY2024
-86.6%

Recent awards

Search contractors

$295,070

SEPOR, INC

Department of Energy

PIID
89243326PFE000943
PSC
3417 - MILLING MACHINES

$2,164

KAMPI COMPONENTS CO INC

Defense Logistics Agency

PIID
SPE8EE26P0238
PSC
3820 - MINING, ROCK DRILLING, EARTH BORING, AND RELATED EQUIPMENT

$2,056

PHOENIX TRADING INC.

Defense Logistics Agency

PIID
SPE8EE26V0145
PSC
3820 - MINING, ROCK DRILLING, EARTH BORING, AND RELATED EQUIPMENT

$45

ALLIED TOOLS, INC

Defense Logistics Agency

PIID
SPE8EE26V0103
PSC
3820 - MINING, ROCK DRILLING, EARTH BORING, AND RELATED EQUIPMENT

FAQ

What work fits NAICS 333131?
  • Fabricate and assemble crushers and screens to meet specified throughput and feed size requirements with welded structural frames and driven components.
  • Manufacture conveyors and ore handling systems including support structures, drive units, belt splicing, and component mounting to equipment drawings.
  • Build underground continuous mining machines or drilling rigs including chassis fabrication, hydraulic systems installation, and integration of cutting or drilling heads.
  • Supply fabricated wear parts and replacement assemblies such as crusher liners, conveyor idlers, and bolted mounting frames under part-numbered contracts.
When is NAICS 333131 a weak fit?
  • On-site equipment repair and refurbishment: field overhaul, welding repairs, and rebuilds performed at mine sites are service and maintenance activities distinct from original equipment manufacturing.
  • Mining operations and extraction services: mineral extraction, production drilling, and ore processing at mines involve operational services rather than manufacturing of equipment.
  • Small metal stamping or fastener production: manufacture of stamped vehicle panels or small headed fasteners uses different high-speed stamping and cold-heading processes not characteristic of heavy mining equipment fabrication.
What solicitation language points to NAICS 333131?
  • Specifications call for fabrication to OEM drawings, specified material grades, weld procedure qualifications, and dimensional tolerances for heavy assemblies.
  • Contract includes factory acceptance tests, performance verification at rated throughput or torque, and delivery of operation and maintenance manuals.
  • Line items list complete equipment assemblies with serialized part numbers, spare parts kits, and defined warranty or post-delivery support milestones.

Put this market knowledge to work

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