The size of the material that an impact crusher can produce largely depends on the settings of the crusher and the nature of the material being processed. In general, impact crushers can produce materials with varying sizes, typically ranging from fine particles (around a few millimeters) to larger aggregates (up to about 150-200 millimeters).
The specific size is controlled by adjusting the rotor speed, the spacing between the impact plates, and other machine settings. To achieve finer material, the impact crusher settings can be adjusted to allow for more crushing stages and higher speeds. For coarser output, adjustments can be made to allow larger particles to pass through.
It's important to refer to the manufacturer's specifications and guidelines to understand the exact capabilities and adjustments required for your specific impact crusher model.