Jaw crushers are designed to crush all hardness of stones. In addition to using as a primery crusher, It can be also used as a secondery crusher. Jaw crushers crush the material by applying high pressure due to working principle.
What Are Jaw Crushers and How Do They Work?
In a jaw crusher, material is crushed by compression between a fixed jaw and a moving jaw (pitman) driven back and forth by an eccentric shaft. The moving jaw is supported at the bottom by a toggle plate; the closed side setting (CSS) is set by the adjustment system.
Thanks to its simple, robust design, the jaw crusher is the most common primary crusher for hard and abrasive rock. Flywheels store energy and smooth the crushing impulses.
Applications
- Primary crushing in quarries
- Mining and mineral processing plants
- Concrete and demolition waste recycling
- Mobile crushing plants
Selection Checklist
- Feed opening should be about 80% larger than the maximum feed size
- Capacity evaluated at the selected CSS
- Adjustment system (shims, wedges or hydraulic) chosen for ease of maintenance
- Jaw plate profile selected for the material
Main Spare Parts for Jaw Crushers
Frequently Asked Questions
What reduction ratio does a jaw crusher achieve?
Typically between 1:6 and 1:8; for a finer product a cone or impact crusher follows it.
When should jaw plates be turned or replaced?
When the tooth profile at the lower zone is worn and the CSS can no longer be held, the plates are turned; when both ends are worn they are replaced.
Detailed guides: what is a jaw crusher, jaw crusher spare parts, jaw crusher sizes.