How to reduce the wear of jaw plate teeth of jaw crusher and increase the life of jaw plate?

1. Choose materials with better wear resistance

UNIQUE GROUP uses high manganese steel Mn13Cr2 for jaw crushers and Mn18Cr2 for large jaw crushers. Other factories only use Mn13 for jaw crusher materials. Everyone knows that Cr2 is very expensive, but UNIQUEMAC group must be responsible to customers and cannot cut corners. Adding Cr2 components greatly increases the service life of jaw plate!
Suitable for high impact conditions, the surface hardens after impact, and the wear resistance is improved

2. Optimize equipment operating parameters

Control feed size: avoid exceeding the maximum feed size designed for the crusher to reduce the impact load on the jaw plate.
Uniform feeding: Use a vibrating feeder to ensure uniform distribution of materials and prevent partial load from causing increased local wear.
Reasonably adjust the discharge port: Select an appropriate crushing ratio according to production needs to avoid too small a discharge port to increase the pressure on the jaw plate.
Avoid overload operation: Long-term overload operation will accelerate wear, and current and vibration signals need to be monitored.

3. Improve the structure design of the jaw plate

UNIQUEMAC GROUP’s technical team of engineers optimizes the spacing between the jaw plate teeth for different materials, and designs the tooth height and tooth spacing according to the material characteristics (e.g., shallow teeth are used for crushing hard materials, and deep teeth are used for crushing soft materials).
Symmetrical design: The jaw plate is designed to be symmetrical up and down or left and right, and can be swapped and reused after wear.
Modular design: The block-type jaw plate can be replaced separately after local wear, reducing costs.

4. Strengthen maintenance and care

Regularly check wear: By measuring the change in the thickness or tooth height of the jaw plate, timely adjust or replace it (it is recommended to replace it when the wear reaches 30%).
Tighten the bolts: Prevent the jaw plate from loosening and causing increased vibration and impact.
Cleaning the crushing chamber: Regularly remove residual materials and metal foreign matter (such as iron blocks) to reduce abnormal wear.
Lubrication system maintenance: Ensure that the bearings and moving parts are well lubricated to reduce friction heat and vibration.

5. Use surface treatment technology

Overlay wear-resistant layer: Overlay high-hardness materials such as tungsten carbide on the surface of the jaw plate to improve local wear resistance.
Spraying wear-resistant coating: forming ceramic or metal ceramic coating on the surface through thermal spraying technology (such as plasma spraying).
Pre-hardening treatment: surface quenching or carburizing of the jaw plate to improve the surface hardness.

6. Adjust crusher parameter matching

The wear-resistant parts at the core of the jaw crusher are the heart of the equipment. Engineers optimize the motion trajectory of the movable jaw: ensure the coordination of the extrusion and return movements of the movable jaw to reduce ineffective friction.
Adjust the angle between the movable jaw and the fixed jaw: avoid too large an angle to increase the sliding friction of the material.

7. Material pretreatment

Screening and impurity removal: sieve out fine powder and impurities (such as soil) before feeding to reduce grinding wear caused by adhesion.
Control material humidity: too high humidity is easy to adhere and increase friction; drying equipment can be added or the material ratio can be adjusted.