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NAICS Code· 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.

1
Active Contracts
$916K
Total Obligations (12mo)
17
Awarded Contracts (12mo)
14
Contractors Awarded (12mo)
-28.4%
YoY Growth

Awarded Contractors

Companies that have received federal awards classified under NAICS 333131.

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NAICS 333131 FAQ

Frequently Asked Questions

NAICS code 333131 covers 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--

Recently Posted in Mining Machinery and Equipment Manufacturing

NAICS: 333131
Closed
SLED
One (1) Mobile Incline Screening PlantThe City of Flagstaff, through its Public Works - Fleet Services department, is soliciting bids for the purchase of one mobile incline screening plant under solicitation number 2026-195, with a submission deadline of June 18, 2026, at 3:00 p.m. Arizona time. The equipment must be a self-propelled tracked machine powered by a diesel engine capable of full operational capacity at 7,000 feet above sea level, with local parts, repair, and maintenance support available in Flagstaff. The screening plant must feature a two-deck configuration with a (20°x 5°) screening deck, accept universal non-proprietary screens, and utilize hydraulically driven feed and processing belts including a Chevron-style feed belt to minimize material roll-back. Hydraulic systems must employ JIC, SAE, or ORFS fittings, and adjustments to hydraulic pressures and feed rates must be possible without proprietary or specialized electronic equipment. All common components—including rollers, belts, screens, hoses, pumps, and valving—must be available within a 300-mile radius of Flagstaff, with service and repair requests required to be fulfilled within 72 hours of submission. The bidder must provide documentation proving local inventory availability and a list of commonly failed parts. The procurement is conducted as an Invitation for Bids under NAICS code 333131, and awards will be made to the lowest responsible and responsive bidder based on compliance with strict pass/fail criteria. Responsiveness requires timely submission with all required forms, signatures, certifications, and complete pricing details, including line items for the unit, taxes, freight, and any additional fees. Responsibility involves demonstrating technical capacity, experience, integrity, and reliability as outlined in Article 16 of the City’s Procurement Code. Bidders are required to complete and submit several mandatory forms, including a Bidder Questionnaire, References Form, Disclosure Form, and an Exceptions Form for any proposed deviations from the solicitation. The Bidder must also declare solvency, confirm no gratuities were offered to public officials, provide a non-collusion statement, and disclose any past litigation with the City. Proposals must be submitted exclusively through the OpenGov portal, with no late submissions permitted. Bids must remain valid for 120 days after the closing date, and all proprietary information must be clearly marked as confidential and attached separately. After award, payment will be processed within 30
Public Works - Fleet Services

POSTED

about 2 months ago

CLOSED

28 days ago
View Details

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