How to adjust jaw crusher gap?

Jaw crusher is mainly crushing hard stone through the extrusion between two jaw plates. After some time, it needs to adjust the gap between the jaw plates. Is there any way to achieve the required material size without replacing crushing machine? Here, we will provide methods for adjusting the gap size of jaw crusher and the equipment used. The common ways to adjust jaw crusher gap are toggle plate adjustment, gasket adjustment and wedge adjustment.

Methods to adjust jaw crusher gap

Jaw crusher gap adjustment is very convenient, only need to adjust the pull rod spring behind the jaw plate, you can increase or reduce the spacing. The method can be applied to a wide range of jaw crushers, including large jaw crusher and the required material size can be achieved without expanding or reducing the size of jaw crusher. Let us study the detailed method as below.

1. Toggle plate adjustment. The toggle plate of jaw crusher is to transfer power to make the movable jaw plate swing back and forth, and also it has the role of safety insurance. Changing its length could be used to adjust jaw crusher discharge port.

2. Gasket adjustment. Put a set of gaskets between the back support seat of the rear toggle plate and the back wall of the rack, increase or decrease the number of gaskets or change its thickness, so as to reduce or increase the outlet of jaw crusher. This method has the advantages of compact structure and reliable adjustment. So it is widely used in large and medium-sized jaw crushers.

3. Wedge adjustment. Adjust with two wedges placed between the backseat of the toggle plate and the frame. The more wedge number, the outlet is smaller. This method is suitable for small scale jaw crusher.

4. Large jaw crusher can not be adjusted by human power, it generally uses hydraulic adjustment. Small jaw crusher generally uses wedge adjustment or support device adjustment. If the force is not enough, a jack tool could be helpful.

Step by step to adjust jaw crusher liner

The gap setting on a jaw crusher's liner is an important factor that affects the performance of the crusher. Here are the basic steps for setting the gap on a jaw crusher's liner. More detailed steps to adjust jaw crusher gap, the video taken by Baichy Machinery will be more helpful.

1.Turn off the power to jaw crusher
2.Remove the feed hopper and feed tube from jaw crusher.
3.Loosen the lock nuts on the tension rods located at the back of the crusher.
4.Open the crusher to the appropriate width, as determined by the desired gap between the two jaw plates.
5.Insert a feeler gauge between the two plates at the point where the crusher is the narrowest, and adjust the crusher to the desired width.
6.Tighten the tension rods to lock the jaw plates in place.
7.Reattach the feed hopper and feed tube.
8.Turn on the power to the jaw crusher and test its performance

Choose one suitable methods and following above adjusting steps, the jaw crusher performance and service time will be much improved. Maybe some problem you may meet, we are pleased to detailed guide by call or video. After all, our company has more than 20 years jaw crusher production experience.

Frequently Asked Questions: About Jaw crusher

What is the gap on a jaw crusher?

Actually it is the discharge opening of a jaw crusher. The swinging jaw which reciprocates in a horizontal plane usually makes an angle with the fixed jaw. The jaw crusher gap is the bottom of angle.

When to need adjusting jaw crusher gap?

User has certain outlet size requirements, or continuous wear of the jaw plate, it could adjust the jaw crusher simply to prolong jaw crusher lifetime and save cost.

How to increase the output of jaw crusher

Increasing jaw crusher production can be done by control the feeding size without jamming or clogging, Reasonably adjust the discharge port and realize the pre-screening process. Most importantly, make sure you are using the right stone crusher for your job.

How to use jaw crusher

Jaw crushers are comprised of a fixed plate and a moving plate. To prolong jaw crusher's service time, we need to know its foundation construction, installation, maintenace, proper operation and  spare parts replacement.