Jaw crushers are versatile machines used in various industries for primary crushing of hard and abrasive materials. There are several variations of jaw crushers, each designed for specific applications and operational requirements. Here are the main types and their key variations:
1. Blake Jaw Crusher (Double Toggle)
– Design: Features a fixed jaw and a movable jaw pivoted at the top.
– Motion: The swing jaw moves in an elliptical path due to the double-toggle mechanism.
– Advantages:
– Better crushing efficiency for hard materials.
– Lower wear on the jaw plates due to less rubbing motion.
– Disadvantages:
– More complex design with additional toggle plates.
– Higher initial cost.
2. Dodge Jaw Crusher (Single Toggle)
– Design: The swing jaw is pivoted at the bottom, creating a reciprocating motion.
– Motion: Moves in a straight line (linear motion) towards the fixed jaw.
– Advantages:
– Simpler construction with fewer moving parts.
– Lower maintenance costs.
– Disadvantages:
– Higher wear on jaw plates due to rubbing action.
– Less efficient for hard materials compared to Blake crushers.
3. Universal Jaw Crusher (Overhead Eccentric)
– Design: Uses an overhead eccentric shaft to drive the swing jaw.
– Motion: Combines elements of both Blake and Dodge designs, allowing for more versatility.
– Advantages:
– Can be used for both primary and secondary crushing.
– Adjustable discharge setting for different product sizes.
– Disadvantages:
– More complex than single-toggle designs.
4. Hydraulic Jaw Crushers
– Feature: Uses hydraulic systems to adjust the crusher settings and relieve overloads automatically.
– Advantages:
– Quick and easy adjustment of the discharge gap.
– Improved safety with automatic tramp release.
– Applications: Often used in modern mining and quarrying operations.
5. Mobile Jaw Crushers
– Feature: Mounted on tracks or wheels for portability.
– Advantages:
– Can be moved easily between job sites.
– Reduces material transportation costs in mining and recycling applications.
6. Laboratory/ Mini Jaw Crushers
– Smaller versions designed for sample preparation in labs or small