The main advantages would be reduced weight and less complexity.

The rollerjaw rock crusher melds the concepts of jaw crushing and roll crushing long employed in the mining and rock-crushing industries. Rollerjaw rock crushers have been proposed for inclusion in geological exploration missions on Mars, where they would be used to pulverize rock samples into powders in the tens of micrometer particle size range required for analysis by scientific instruments. On Earth, scaled-up rollerjaw rock crushers could be used in mining and rock-crushing operations in which jaw crushers followed by roll crushers or roll mills have traditionally been used. A single rollerjaw rock crusher would be less complex and would weigh about half as much as does an equivalent conventional combination of a jaw crusher and a roller crusher.