Jaw crusher eccentric shaft bending or fracture may be caused by the following reasons:
1. Occurred in the process of host hoisting, unilateral eccentric axis bending stress;
2. Be broken material hardness more than product instruction manual regulation;
3. The jaw crusher host long-term overload operation;
4. The bracket is not standard, not broken things since they entered the crushing cavity fault protection;
5. Eccentric shaft improper heat treatment, stress concentration, cause fracture in the short term.

Meet with jaw crusher eccentric shaft bending or breaking can take the following measures:
1. Change a new eccentric shaft, lifting right host;
2. Change a new eccentric shaft, according to the materials of compressive strength, broken choose that meet the needs of crusher;
3. Change a new eccentric shaft, is appropriate to the work load or replace crusher;
4. Replace the eccentric shaft, do not use does not conform to design standard of bracket, bracket pad;
5. Change a new eccentric shaft, the use of qualified eccentric shaft heat treatment.