Jaw crushers

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Match a jaw crusher to primary crushing by checking feed size, required product, closed-side setting, jaw profile and the characteristics of the material.

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How do you select a jaw crusher?

Material is compressed between a fixed and a moving jaw. Jaw crushers are commonly used for primary crushing, but feed characteristics, settings and the equipment before and after the crusher determine actual performance.

Process parameters

  • Feed-opening dimensions and maximum lump size, allowing for the shape and orientation of pieces rather than one nominal dimension.
  • Closed-side setting (CSS), adjustment range and the product gradation required by the downstream process.
  • Capacity for comparable material, abrasiveness and moisture, the amount of fines and the consistency of feeding.

Configuration and wear parts

  • Jaw-plate profile and material, remaining wear, retention system and the procedure for turning or replacing the plates.
  • Hopper, feeder, grizzly, discharge clearance and handling of uncrushable objects; for recycling, also the metal-separation arrangement.
  • Drive, setting adjustment, overload protection, central lubrication and safe service access.

Inspecting a used jaw crusher

Inspect the jaw plates, cheek plates, bearings, eccentric shaft, tensioning mechanism, frame and any weld repairs. Check clearances, bearing temperatures, noise, leaks and the setting adjustment. Ask for the serial number, operating hours, replacement history and a test with material.

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