Stone Jaw Crusher

What is Stone Jaw Crusher？

Stone Jaw Crusher is a primary crushing device that uses compressive force to break large rocks into smaller particles. The equipment applies squeezing and bending actions through a V-shaped crushing chamber formed by a fixed jaw plate and a moving jaw plate, reducing feed material to the desired size.

This machine has an upper compressive strength limit of three hundred twenty megapascals, covering the crushing needs of most common ores and rocks. The equipment is applied in mining, building materials, highways, and construction waste recycling.

How does Stone Jaw Crusher achieve crushing？

The working principle is based on the periodic reciprocating motion of the moving jaw. The motor drives the eccentric shaft through belts, causing the moving jaw plate to periodically approach and move away from the fixed jaw plate. When approaching, the angle between the two plates increases, and the material is strongly compressed and fractured. When moving away, the angle decreases, and the crushed material is discharged.

This cycle repeats continuously, enabling uninterrupted feeding and discharging. Stone Jaw Crusher features a deep-chamber design with a non-dead-zone structure that improves feed capacity and throughput.

The key technical parameters of Stone Jaw Crusher

Technical parameters cover feed opening size, maximum feed size, discharge adjustment range, processing capacity, eccentric shaft speed, motor power, and net weight. The PE series focuses on large feed capacity and high throughput for coarse crushing, while the PEX series emphasizes particle size control for fine crushing. Data are measured under standard conditions with material bulk density of one point six tons per cubic meter and medium hardness. Actual values vary with moisture content, clay content, and feed continuity. Parameters comply with GB/T 25700-2021 national standard and factory test reports.

Reserve eighty to ninety percent of theoretical capacity during selection and verify that material hardness is within the three hundred twenty megapascal limit. Discharge adjustment varies by model: PE series typically uses shim adjustment, PEX series may offer hydraulic options. Refer to the nameplate for specific configurations.

What advantages does Stone Jaw Crusher offer？

The equipment has developed several differentiating capabilities validated in field records.

Crushing ratio: Stone Jaw Crusher can reduce feed of seven hundred fifty millimeters to below one hundred millimeters, achieving a ratio of six to eight times, reducing the number of units required in downstream stages.

Structural reliability and material adaptability: The equipment has few moving parts. In a Sumatra project, it operated continuously for four production seasons without major failures, with annual availability exceeding eighty-five percent. From limestone of fifty megapascals to granite of three hundred megapascals, the same unit can handle them all by changing jaw plate tooth profiles.

Maintenance convenience: Jaw plates use wedge-type fastening. Liner replacement can be completed within four working hours, saving over sixty percent of time compared to bolt-type fastening.

Operational economy: The compound pendulum type is twenty to thirty percent lighter than same-spec simple pendulum type, with specific energy consumption of zero point five to zero point eight kilowatt-hours per ton. At a South China limestone mine, wear parts expenditure over three years was about fifteen percent lower than other options.

What application scenarios is Stone Jaw Crusher suitable for？

Mining industry: Stone Jaw Crusher reduces blasted ore to below two hundred millimeters for conveyor transport, providing feed for subsequent beneficiation processes. In Sumatra alone, over seventy jaw crushers operate in primary crushing sections of metal and non-metal mines.

Building materials: The equipment crushes limestone, granite, and other aggregates, with product size controllable within forty to eighty millimeters, supplying materials for concrete batching and asphalt mixing plants.

Construction waste recycling: This machine breaks waste concrete blocks and masonry debris into thirty to sixty millimeter recycled aggregates. Jaw plate wear in this application is about thirty to fifty percent of that when processing natural stone, which extends wear parts life.

How to select between Stone Jaw Crusher and other crushing equipment?

Division with cone crusher: This equipment undertakes primary coarse crushing, reducing material to one hundred to three hundred millimeters. The cone crusher handles secondary fine crushing. A typical line starts with Stone Jaw Crusher in open circuit and finishes with a cone crusher or impact crusher in closed circuit, achieving reasonable overall capacity match.

Application boundary with impact crusher: For materials exceeding two hundred megapascals such as granite and basalt, the compressive action of this equipment is suited. Impact crushers are more suitable for medium-hard limestone below one hundred fifty megapascals. In a Fujian granite project after two thousand hours, jaw plate wear was only forty percent of the impact crusher's blow bar wear.

Selection basis: Choice depends on material hardness, annual throughput, and product gradation. For every fifty megapascal increase in hardness, the primary-crushing advantage increases by about twenty percent. When annual throughput exceeds five hundred thousand tons and feed exceeds five hundred millimeters, using this machine as the primary crusher becomes advisable.

Actual project performance data of Stone Jaw Crusher

Sumatra granite project (Q3 2025): A PE 600×900 Stone Jaw Crusher processed feed of four hundred to four hundred fifty millimeters, with product controlled at one hundred to one hundred fifty millimeters. The equipment ran sixteen hours daily, processing twenty-eight thousand tons per month, with original jaw plates lasting five point two months. Compared to another brand, specific power consumption decreased by about eight percent, from zero point seven six to zero point seven zero kilowatt-hours per ton.

Guangxi limestone line with annual output of 1.5 million tons: A PE 900×1200 Stone Jaw Crusher handled maximum feed of seven hundred millimeters. Under full load, capacity reached three hundred twenty tons per hour, about five percent above nameplate rating. Bearing temperatures remained below seventy-five degrees Celsius over twelve months, with no high-temperature alarms triggered.

North China construction waste center: A PEX 250×1200 Stone Jaw Crusher processed waste concrete of strength grade C30 and below, with maximum size about two hundred millimeters. Output was thirty to fifty millimeter recycled aggregates for road base. The equipment has run for eleven months, processing over thirty thousand tons. Jaw plate wear was about forty percent of that when processing natural stone, with one set expected to last eighteen months.

Frequently Asked Questions about Stone Jaw Crusher

What should I check when buying a used Stone Jaw Crusher?

Inspect the jaw plates and liners for wear, check bearings and toggles, and verify the service history. Ask suppliers to provide a video demonstration of the crusher operating with material similar to yours.

How do I select the right Stone Jaw Crusher for my application?

Selection depends on material hardness, maximum feed size, desired product size, and throughput requirements. The maximum feed size should be eighty percent of the feed opening width.

What are the most common operational problems with Stone Jaw Crusher?

Excessive vibration is usually caused by uneven feed or loose flywheel bolts. Abnormal knocking noise often indicates loose jaw bolts or tramp metal in the chamber. Bearing overheating typically results from insufficient or contaminated lubricant.

How often should I perform maintenance on Stone Jaw Crusher?

Check jaw dies and bolts daily. Lubricate bearings every four hundred operating hours. Replace bearings after approximately seven thousand two hundred operating hours. Rotate or replace jaw plates when wear reaches fifty to sixty percent of original thickness.