How to adjust the cone crusher output size

1. Determine the adjustment method

The discharge particle size adjustment of the cone crusher mainly relies on the following two methods:

Mechanical adjustment (old model): by rotating the adjustment ring to raise and lower the moving cone and change the width of the discharge port.

Hydraulic adjustment (modern model): the position of the moving cone is controlled by the hydraulic cylinder to achieve stepless adjustment.

2. Adjustment steps

Mechanical adjustment (taking the spring cone crusher as an example)
Stop and power off
Make sure the equipment stops running completely, cut off the power supply, and hang a warning sign.

Release the locking device
Remove the locking spring or hydraulic locking device on the adjustment ring.

Rotate the adjustment ring

Use a special wrench or lifting equipment to rotate the adjustment ring (clockwise rotation ↑ moving cone → discharge port ↓, the discharge becomes finer; counterclockwise rotation ↓ moving cone → discharge port ↑, the discharge becomes coarser).

Each rotation changes the discharge port by about 2~3mm, please refer to the equipment manual.

Lock and check
After adjustment, re-lock the spring/hydraulic device and manually turn the wheel to confirm that there is no obstruction.

Hydraulic adjustment (such as multi-cylinder hydraulic cone crusher)
Operation of hydraulic system

Adjust the hydraulic cylinder pressure through the control cabinet or hydraulic station to push the moving cone up and down.

Increase the pressure → the moving cone rises → the discharge port becomes smaller (the discharge becomes finer); conversely, the discharge port becomes larger.

Real-time monitoring
Observe the discharge port value on the instrument panel (some models are equipped with sensors) or use a gap gauge to measure manually.

Test run verification
Start the equipment without load, feed after confirming that there is no abnormality, and take samples to check the discharge particle size.

3. Key points

Particle size and capacity balance: reducing the discharge port will reduce the processing volume and increase the risk of over-crushing; increasing it may affect the quality of the finished product.

Inspection of liner wear: If the liner (moving cone/fixed cone) is severely worn, it is difficult to ensure the particle size even if the discharge port is adjusted, and it needs to be replaced in time.

Synchronous adjustment of feeding: When the discharge particle size changes, the feeding speed and material hardness need to be matched to avoid blockage or overload.

Hydraulic system maintenance: Regularly check the cleanliness and oil pressure of the hydraulic oil to prevent leakage or unstable pressure.

4. Auxiliary optimization measures

Pre-screening: Screen out fine materials before crushing to reduce over-crushing.

Closed-loop circulation: Return the discharged material to the screening machine and re-crush the unqualified materials (applicable to fine particle size requirements).

Regular calibration: Use a lead block or a gap gauge to measure the actual discharge port every shift to avoid mechanical errors.

5. Safety tips

It is strictly forbidden to operate the equipment during adjustment to prevent mechanical damage.

Perform maintenance after the hydraulic system is depressurized to avoid the risk of high-pressure oil injection.

Wear protective equipment (gloves, helmets, etc.).

If the equipment model is special (such as HP series, HST single-cylinder cone crusher, etc.), it is recommended to refer to the manufacturer’s manual or contact technical support. Some models may require special tools or software parameter adjustment. Data needs to be recorded after adjustment for subsequent maintenance analysis.