CJC-90 Jaw Crusher Machine 90-270 T/H

The CJC-90 represents a critical component in CONSTMACH's primary crushing equipment lineup, engineered specifically for operations demanding robust performance across a broad material spectrum. With a jaw opening of 900 x 650 mm and production capacity ranging from 90 to 270 tons per hour, this crusher addresses the initial reduction requirements of quarries, mining operations, and construction material production facilities where material hardness varies significantly.

What sets this particular model apart is its versatile processing capability. From soft limestone formations to exceptionally hard granite deposits, the CJC-90 handles diverse feed materials without compromising operational efficiency. This adaptability stems from carefully calculated jaw angles combined with high flywheel speeds that maintain consistent inertia throughout the crushing cycle. The machine operates at 277 rpm, a speed that ensures continuous momentum even when processing the most resistant materials. This characteristic becomes especially valuable in applications where feed composition changes frequently throughout the production day.

The structural foundation of the CJC-90 reflects industrial-grade construction principles. The base frame undergoes submerged arc welding followed by thermal stress relief treatment, a process that eliminates internal tensions and enhances long-term dimensional stability. This manufacturing approach prevents the frame distortion that typically occurs under prolonged heavy-duty operation. Supporting the crushing mechanism are oversized spherical roller bearings with self-aligning properties. These bearings accommodate the substantial radial and axial loads generated during crushing while compensating for minor misalignments that develop over extended service periods.

The pitman assembly utilizes drop-forged chrome-nickel steel, a material selection driven by the extreme forces encountered in primary crushing. This alloy composition provides the necessary toughness to absorb shock loads when oversized material enters the crushing chamber, reducing the risk of catastrophic component failure. The large flywheels attached to the system serve a dual purpose: they store kinetic energy during the open phase of the crushing cycle and release it during compression, creating smoother torque characteristics and reducing peak power demands on the 75 kW drive motor.

Operational flexibility comes through the hydraulic setting mechanism, a feature that distinguishes this crusher from mechanically adjusted alternatives. Operators can modify the closed side setting (CSS) between 50 and 150 mm without stopping production or manually accessing confined adjustment points. This capability allows rapid response to changing product specifications or feed characteristics, minimizing downtime during grade transitions. When production requirements shift from base course material to larger rip-rap, adjustment occurs through controlled hydraulic pressure rather than time-consuming mechanical procedures.

Safety features include protective plates and rear blocks that shield critical components from damage caused by uncrushable materials passing through the chamber. Should tramp iron or other contaminants enter with the feed, these elements absorb the impact rather than transmitting destructive forces to bearings or frame structures. For operations running extended shifts, an optional automatic lubrication system can be integrated, ensuring bearing surfaces receive consistent oil supply without relying on manual maintenance intervals.

At 11,400 kg, the CJC-90 provides the mass necessary for stable operation while remaining within the transport and installation capabilities of standard construction equipment. This weight contributes to vibration damping and foundation load distribution, factors that influence both crusher performance and the longevity of supporting structures.

CONSTMACH incorporates this jaw crusher model into both stationary and mobile crushing configurations, making it adaptable to fixed plant installations or relocatable projects where crushing must occur at multiple sites. The machine functions as the primary reduction stage, receiving run-of-mine material and producing intermediate-sized product suitable for secondary crushing or direct use in applications accepting coarser gradations.