For primary crushing, landfill recycling, and concrete recycling, the Keestrack B4 Mobile Jaw Crusher features a patented non-stop system that ensures continuous processing while protecting the machine from uncrushable materials. This versatile crusher is suitable for a wide range of applications, including medium and hard stones, quarrying and mining, construction and demolition waste, as well as coal, gravel, and slag.

The B4 is equipped with an independent double-deck vibrating prescreen and an automatic feeding system. This system optimizes the supply within the crushing chamber by detecting overloads and slowing down the feed to prevent jamming and ensure the best results. Load-sensing hydraulics reduce fuel usage by 25%, and for businesses prioritizing environmental responsibility, the B4 is also available in a full-hybrid e-version.

The hybrid model includes a 324-horsepower diesel engine and a 225-kVA onboard generator. During plug-in operation, the diesel engine does not need to be started, and complete energy management is controlled automatically, including the electric supply to secondary units such as a screener or stacker. This results in significantly reduced fuel consumption and maintenance.