A fixed jaw, mounted in a V-shaped alignment, is the stationary breaking surface, while a movable, swing jaw exerts force on the feed material by pushing it against the stationary plate. The space at the bottom of the V-aligned jaw plates is the output gap that dictates the size of the crushed product from the jaw crusher. Aug 05, 2021 Principle Of Working Two different types of jaw crushers use a different type of working principle. As far as the single-toggle jaw crusher is concerned its moving jaw operates in an elliptical pattern. For a double-toggle jaw crusher, pendulum motion is seen.