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Electric Motors

Quarry Duty

Quarry Duty motors also known as Crusher Duty motors typically feature oversized bearings and shafts, high strength shafts, exceptional high torque, larger frames, and roller bearings for heavy radial loads associated with belt-driven applications. Quarry Duty motors do not typically feature premium efficiencies as they are not required to meet NEMA Premium efficiency levels as defined in EISA 2007.

ESR Motor Systems stocks a large number of 4 and 6-pole quarry duty motors up to 500 horsepower.

Featured Manufacturers:


  • Phase: Three Phase
  • Horsepower: 2 - 600
  • Voltage: 230/460, 460, 575
  • Enclosure: TEFC
  • Material: Rolled Steel, Cast Iron
  • Efficiency: High Efficient, Premium Efficient
  • Cycle: 60Hz


  • Ball & Rolling Mills
  • Centrifuges
  • Chippers
  • Cone Crushers
  • Conveyors
  • Debarkers
  • Grinding Mills
  • Hammer Mills
  • Jaw Crushers