Establishments primarily engaged in manufacturing heavy machinery an equipment used by the mining industries, such as coal breakers, mine cars, mineral cleaning machinery, concentration machinery, core drills, coal cutters, portable rock drills, and rock crushing machinery. Establishments primarily engaged in manufacturing construction machinery are classified in Industry 3531; those manufacturing welldrilling machinery are classified in Industry 3533; and those manufacturing coal and ore conveyors are classified in Industry 3535.

• Amalgamators (metallurgical and mining machinery)
• Auger mining equipment
• Bits, rock: except oil and gas field tools
• Cages, mine shaft
• Car dumpers, mining
• Clarifying machinery, mineral
• Classifiers, metallurgical and mining
• Cleaning machinery, mineral
• Coal breakers, cutters, and pulverizers
• Concentration machinery (metallurgical and mining)
• Crushers, mineral: stationary
• Drills and drilling equipment, mining: except oil and gas field
• Drills, core
• Drills, rock: portable
• Feeders, ore and aggregate
• Flotation machinery (mining machinery)
• Grinders, stone: stationary
• Hammer mills (rock and ore crushing machines), stationary
• Loading machines, underground: mobile
• Mining cars and trucks (dollies)
• Mining equipment, except oil and gas field: rebuilding on a factory
• Mining machinery and equipment except oil and gas field
• Ore crushing, washing, screening, and loading machinery
• Pellet mills (mining machinery)
• Plows, coal
• Pulverizers, stone: stationary
• Scraper loaders, underground
• Screeners, stationary
• Sedimentation machinery, mineral
• Separating machinery, mineral
• Shuttle cars, underground
• Stamping mill mining machinery
• Washers, aggregate and sand: stationary type