jaw crusher liner plate

A jaw crusher liner plate is a critical wear part in a jaw crusher machine, which protects the main frame of the crusher and directly interacts with the crushed material. Here’s a detailed overview:

1. Function of Jaw Crusher Liner Plates

• Protect the Jaw Crusher Frame: Absorb impact and wear from crushing hard rocks, ores, and other materials.
• Determine Crushing Efficiency: The shape and design affect particle size distribution.
• Replaceable Wear Part: Liners are periodically replaced to maintain crusher performance.

2. Types of Jaw Crusher Liners

• Fixed & Movable Jaw Plates:

– Fixed jaw liner (stationary die) – Attached to the crusher’s fixed frame.
– Movable jaw liner (swing die) – Moves with the swing jaw to crush material.

• Material Options:

– Manganese Steel (Mn14, Mn18, Mn22): Most common due to high toughness and work-hardening properties.
– High Chrome Iron: Used for highly abrasive materials but less impact-resistant than manganese.
– Composite Materials: Combine metal alloys for better wear resistance.

3. Design & Tooth Profiles

• Straight/Flat Liners: For fine crushing or softer materials.
• Curved/Wavy Liners: Improve grip on hard rocks for better crushing efficiency.
• Chevron/Tooth Patterns: Enhance material grip and reduce slippage.



4. Factors Affecting Liner Life

• Material hardness & abrasiveness
• Feed size & crusher settings (CSS – Closed Side Setting)
• Operating conditions (moisture, contamination)
• Proper installation & alignment



5. Maintenance Tips

• Regularly check for wear and replace liners before excessive damage occurs.
• Rotate or flip liners to extend service life (if double-sided).
• Ensure proper tightening to avoid movement during operation.

6. Replacement Signs

• Visible cracks or severe wear (~60–70% worn).
• Reduced crushing efficiency or uneven product size.
• Increased power consumption due to poor liner condition.

7. Leading Manufacturers

• Metso, Sandvik, Terex, Kleemann, FLSmidth, and local foundries.

Would you like recommendations on selecting the best liner material for your application?