NAICS 333131: Mining Machinery and Equipment Manufacturing
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. Cross-References. Establishments primarily engaged in--Show more
NAICS 333131 – Mining Machinery and Equipment Manufacturing encompasses the design, fabrication, and assembly of heavy-duty machinery and equipment used in extractive operations such as surface and underground mining, quarrying, and mineral processing. This includes draglines, shovels, haul trucks, continuous miners, rock breakers, conveyors, and specialized ventilation and dewatering systems engineered for harsh, high-wear environments.
Industry Spending Overview
Federal obligations, top contractors and agencies, and related industry codes for NAICS 333131.
AI Industry Description
NAICS 333131 – Mining Machinery and Equipment Manufacturing encompasses the design, fabrication, and assembly of heavy-duty machinery and equipment used in extractive operations such as surface and underground mining, quarrying, and mineral processing. This includes draglines, shovels, haul trucks, ...
NAICS 333131 – Mining Machinery and Equipment Manufacturing encompasses the design, fabrication, and assembly of heavy-duty machinery and equipment used in extractive operations such as surface and underground mining, quarrying, and mineral processing. This includes draglines, shovels, haul trucks, continuous miners, rock breakers, conveyors, and specialized ventilation and dewatering systems engineered for harsh, high-wear environments. These products are critical to the extraction of coal, metals, industrial minerals, and aggregates, and are often customized to meet stringent safety, durability, and operational standards required in federal and federally supported mining projects. While primarily a commercial sector, this NAICS code intersects with government contracting through defense-related mineral supply chains, Bureau of Land Management operations, and U.S. Army Corps of Engineers infrastructure projects involving mineral extraction for base construction or strategic resource development. No contractor data is available to identify top performers in this NAICS code within the federal marketplace. The competitive landscape likely includes large industrial manufacturers with defense and energy sector experience, as well as specialized small businesses offering niche components or retrofitting services for legacy equipment. No agency data is available to identify primary federal buyers. However, demand is typically driven by agencies managing federal lands, energy security initiatives, or defense logistics requiring mineral resources, including the Department of the Interior, Department of Defense, and potentially the Department of Energy. The market for mining machinery in government contracting is highly specialized and opportunity-dense in regions with active federal mineral extraction programs. Procurement tends to be project-based, with long lead times and a preference for proven, ruggedized equipment. Contractors with ISO-certified manufacturing, defense-compliant documentation, and experience in federal environmental compliance are best positioned to compete.
Small Business Size Standard
The SBA threshold that decides who can bid NAICS 333131 work as a small business.
The SBA cap for this NAICS (13 CFR 121.201). A business at or under it can self-certify as small for work in this code, which is what makes it eligible for a small-business set-aside. The cap is set per NAICS, so the same company can be small in one code and not in another.
13 CFR 121.201, effective January 1, 2026. The SBA revises the table roughly once a year.
Top Contractors
Companies with the highest total award value under NAICS 333131, ranked by dollars won.
| Company | Total Awards | Contracts |
|---|---|---|
| RUDY III, ERNEST | $350K | 1 |
| SEPOR, INC | $295K | 1 |
| GEOTECHNICAL CONSULTING & TESTING SYSTEMS, L.L.C. | $77K | 1 |
| DEJANA TRUCK & UTILITY EQUIPMENT CO, LLC | $67K | 1 |
| GOLDEN LINES CONTRACTING COMPANY | $58K | 1 |
| MODERN MACHINERY CO., INC. | $54K | 1 |
| INFLATABLE PACKERS INTERNATIONAL, LLC | $30K | 1 |
| BAYFRONT METAL PRODUCTS LLC | $30K | 1 |
| LARKOS PACKING AND DISTRIBUTION INC. | $18K | 2 |
| MAY TOOL INC | $10K | 1 |
Top Agencies
Federal agencies directing the most contract spending toward NAICS 333131.
Competition
How many companies historically bid on federal awards in NAICS 333131, from bidder counts reported on USAspending.
Median under 3 bidders per reported award. · 2,355 reported awards
Median Bidders
2
Per reported award, all-time
Single-Bid Awards
26%
Share of reported awards with one bidder
10+ Bidder Awards
4%
Share of reported awards with 10+ bidders
Reported Awards
2,355
91% of 2,593 total awards
Share of reported awards in each bidder-count bracket per federal fiscal year.
How this code compares up the NAICS hierarchy. Parent cohorts pool every code under their prefix, so they are the steadier baseline when a 6-digit sample is thin.
| Industry Family | Competition | Median Bidders | Single-Bid | Bidder Mix | Reported Awards |
|---|---|---|---|---|---|
333131This Code Mining Machinery and Equipment Manufacturing | Fewer Bidders | 2 | 26% | 2,35591% of 2,593 | |
33313NAICS Industry | Fewer Bidders | 2 | 34% | 4,70192% of 5,130 | |
3331Industry Group Agriculture, Construction, and Mining Machinery Manufacturing | Fewer Bidders | 2 | 31% | 59,29055% of 107,893 | |
333Subsector | Fewer Bidders | 2 | 45% | 1,796,88757% of 3,142,926 | |
33Sector Manufacturing | Fewer Bidders | 2 | 44% | 16,883,00469% of 24,369,785 |
Bidder counts reported on past federal awards in this NAICS (USAspending). An open opportunity has no bidders yet, so this is the historical norm for similar work, not a fact about this solicitation. Not all awards report bidder counts, and fewer bidders often means incumbent-held work rather than an easier win. Federal reporting of bidder counts fell from ~96% of awards (FY2016) to ~30% (FY2018 onward); the chart shows shares of reported awards, and washed-out stretches mark years with fewer than 30 of them.
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