The “up to” production rating refers to the maximum potential output a machine can achieve under ideal conditions—this includes consistent feed material (size, hardness, and moisture), skilled operator use, proper setup, and minimal downtime. For example, clean concrete with no rebar, fed at a steady rate in optimal weather, will produce higher output than mixed, wet, or irregular materials. Every job site is different, which is why we emphasize that this is not a guaranteed or average output, but a best-case scenario metric. If you’re unsure what output to expect for your application, we’re always happy to review your material and help you model realistic results.

Impact crushers are more sensitive to material hardness and abrasiveness than jaw crushers. The K-IC 70 performs at its best on concrete, asphalt, and softer natural stone — materials that fracture cleanly under impact. On highly abrasive material like hard granite or silica-rich rock, blow bar wear accelerates significantly, increasing operating cost and reducing effective throughput as blow bars degrade between changes. Actual production on any given material depends on hardness, feed size, moisture, and feed consistency — factors best evaluated by running the machine on your specific material during a demonstration.

The trade-off for the higher wear rate on abrasive material is product quality. Impact crushing produces a more cubical, well-graded aggregate compared to the more angular, flaky product from jaw crushing. If your end product needs to meet DOT spec aggregate requirements or you’re processing reclaimed asphalt pavement (RAP) for reuse in paving operations, the K-IC 70’s output profile is often worth the additional wear cost.