What are jaw plates?
A set of jaw plates is composed of the movable (swing jaw) and fixed (stationary) jaw plates. The crushed material in a jaw crusher is compressed when the movable jaw presses the feed material against the fixed jaw. The rock remains in the crushing chamber until it is small enough to pass through the gap towards the bottom of the jaws.

Jaw plates or jaw dies are the most frequently replaced wear parts of a jaw crusher, so the quality of the jaw plates is one of the most important factors that determines the crushing efficiency and machine operating time.