Jaw crusher design and manufacturing process: Over the past 20 years, against the jaw crusher of the four-link movement method of mechanical design theory has great progress. For example: a two-way Nie crushing chamber angle, short bracket put on a large angle to reduce the transmission angle and eccentricity and so on, the products offered by foreign companies tend to have validated the use of these advanced design theory to improve product performance and reliability. China’s domestic manufacturers a variety of reasons very little use of advanced design theory, its main products were almost exclusively the 20th century, before the 70’s established products, using wear-resistant materials, (such as high-manganese steel) and the important component parts (such as the self-aligning roller bearing) and other domestic-based pieces, life below the international advanced level of similar products. In addition, OEM processing and assembly process and less on the years there is a change, such as the bearing hole, bearing the processing rack assembly process and the processing and assembly and so on.