The roller speed of smooth roll crushers is not fixed and varies with application scenarios. Generally, it ranges from 50 to 300 rpm in most industrial settings . From the perspective of linear velocity, the maximum circumferential speed of smooth rollers is usually less than 11.5 m/s .
Smooth Roll Crushers
Several factors determine the optimal speed. For hard materials or large feed sizes, lower speeds are adopted to ensure crushing efficiency and reduce wear . When processing brittle materials like calcite or limestone, speeds often fall between 80–110 rpm . For coal crushing, the speed is typically controlled at 60–120 rpm to avoid excessive fines .
Lab-scale smooth roll crushers may have higher speeds (e.g., 400–466 rpm) for small-batch testing , while some large-scale equipment for specific materials operates at a lower speed (25–30 rpm) . In practice, the speed is always adjusted based on material properties and production requirements.
