It is explained that the high efficiency, the high output and low power consumption of the PE-250 jaw crusher are achieved through computer aided optimization design of jaw-moving parameters and overall optimum selecting combination design.Safe Operition of a Jaw Crusher is introduced that the shearing pin is used instead of the traditional toggle plate overload protection. The common V-belt is replaced by the narrow Vbelt. And the testing and Inspecting results are also given here.

In this paper, the authors, after analyzing the nip angle concept now used in a jaw crusher design, have discovered that it is right only in a limited range and it does not really reflect the working conditions of a jaw crusher. To describe the jaw crusher working character, "authors propose a new concept: working nip angle. 

This paper presents an optimized design of the working mechanism of the PE250 single toggle jaw crusher. It is worked out on the computer on the principle of mechanical design optimization.