Adjusting the size in a jaw crusher is an essential process to control the desired product output. Below, I’ll explain the general steps involved in adjusting the size of a jaw crusher. Please note that specific procedures may vary depending on the manufacturer and model of the crusher. Here’s a comprehensive guide:
Identify the Adjustment Mechanism:
Different jaw crushers may have slightly different adjustment mechanisms, but most commonly, the size adjustment is achieved by changing the position of the toggle plate or adjusting the position of the eccentric shaft.
Open the Crusher:
Locate the crusher’s discharge opening, which is typically covered by a stationary plate called the toggle plate.
Use the appropriate tools, such as a wrench or hydraulic jack, to remove any bolts or fasteners holding the toggle plate in place.
Carefully lift the toggle plate and set it aside.
Adjust the Discharge Opening:
Depending on the specific mechanism of your jaw crusher, you can use one of the following methods to adjust the discharge opening:
a) Toggle Plate Adjustment:
Some jaw crushers have an adjustable toggle plate that allows for the desired size adjustment.
Move the toggle plate up or down by turning the adjustment bolts located at the back of the crusher.
Turning the bolts clockwise will decrease the discharge opening size, while turning them counterclockwise will increase the size.
Refer to the manufacturer’s instructions for the specific procedure and recommended adjustments.
b) Eccentric Shaft Adjustment:
In crushers with an eccentric shaft, you can adjust the size by changing the position of the eccentric shaft itself.
Use a wrench or similar tool to rotate the eccentric shaft clockwise or counterclockwise.
Turning the eccentric shaft in one direction will decrease the size, while turning it in the opposite direction will increase the size.
Follow the manufacturer’s instructions for the proper procedure and adjustment increments.
Verify the Adjustment:
Once you’ve made the desired adjustment, carefully place the toggle plate back into its original position.
Reattach and tighten any bolts or fasteners that hold the toggle plate in place.
Double-check the adjustment to ensure it matches the desired size requirement.
Inspect the crusher for any loose components or potential hazards before restarting it.
Test and Fine-Tune:
Start the jaw crusher and feed it with a controlled amount of material.
Observe the crushed material’s size and adjust further if needed.
Make incremental adjustments until the desired size of the crushed material is achieved.
Keep in mind that excessive adjustment can negatively affect the crusher’s performance and efficiency.