A jaw crusher is a mechanical device designed to reduce large, hard, and abrasive materials (e.g., rocks, ores, concrete) into smaller particles. It operates using two vertical jaws: one fixed and one movable. The movable jaw, driven by an eccentric shaft, applies compressive force to crush materials against the fixed jaw.

Key Components:

  • Fixed Jaw Plate: Forms the stationary crushing surface.

  • Swing Jaw Plate: Moves elliptically via the eccentric shaft.

  • Eccentric Shaft: Converts rotational motion into linear motion.

  • Toggle Plate: Safety mechanism that fractures under overload conditions.

  • Discharge Setting Adjustment: Controls output particle size.

Working Principle:
Material enters the crushing chamber through the feed opening. The swing jaw moves cyclically, compressing the material against the fixed jaw. Crushed particles exit through the discharge gap, adjustable via a hydraulic or mechanical system. The process relies on compressive forces, making it ideal for brittle materials.

Applications:

  • Mining: Primary crushing of ores.

  • Construction: Aggregate production for roads/concrete.

  • Recycling: Processing demolition waste.

Advantages:

  • High efficiency in primary crushing.

  • Robust construction for heavy-duty operations.

  • Easy maintenance and part replacement.