Jaw Crusher eccentric Shafts

The eccentric shaft, a core component of jaw crushers, converts rotational motion into the swing jaw's reciprocation via its eccentric structure, comprising main/eccentric shaft necks, a shaft body, and transition fillets. Made of high-strength alloys (e.g., 40CrNiMo), it undergoes forging (or casting for small models), precision machining (grinding to IT6 tolerance), and heat treatment (quenching/tempering) for strength (tensile strength ≥800 MPa). Quality control includes material composition checks, UT/MT for internal/surface defects, and dynamic balance testing (residual unbalance ≤10 g·cm). With a 5–8 year service life, it ensures stable crusher operation under high loads.