A jaw rock crusher is a primary crushing machine used to break down large rocks into smaller pieces. The materials used in its construction must be durable, wear-resistant, and capable of withstanding high impact and abrasive forces. Here are the key materials used in different parts of a jaw crusher:
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1. Jaw Plates (Crushing Surfaces)
– Manganese Steel (Mn14, Mn18, Mn22) – Most common due to its high hardness and wear resistance.
– High Chrome Iron (White Iron) – Used for highly abrasive materials.
– Titanium Carbide (TiC) Reinforced Steel – For extended wear life in extreme conditions.
2. Frame & Body
– Cast Steel – Provides structural strength (e.g., carbon steel or alloy steel).
– Welded Steel Plates – Used in modern designs for durability and ease of manufacturing.
3. Toggle Plate
– Cast Iron or Alloy Steel – Designed to break under overload conditions to protect the crusher.
4. Eccentric Shaft & Bearings
– Forged Alloy Steel (e.g., 42CrMo4) – High strength to handle heavy loads.
– Bronze or High-Strength Steel Bearings – For smooth rotation under stress.
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5. Cheek Plates (Side Liners)
– Manganese Steel or AR400 Steel – Protects the sides of the crushing chamber from wear.
6. Flywheel & Pulley
– Cast Iron or Ductile Iron – Provides inertia for smooth operation.
7. Springs & Adjustment System
– High-Carbon Steel Springs – Ensures proper tension for toggle mechanisms.
Factors Influencing Material Selection:
– Type of rock being crushed (abrasive vs. hard).
– Required service life and maintenance frequency.
– Cost-effectiveness vs. performance trade-offs.
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