Jaw Crusher Toggle Plate Seats

The toggle plate seat is a key load-bearing component in jaw crushers, supporting the toggle plate at the frame’s rear wall and swing jaw’s lower part to transmit crushing forces and enable the swing jaw’s oscillation. It comprises a high-strength base body (ZG35CrMo/HT350), a contact surface (spherical concave or flat groove) matching the toggle plate, and fixing structures (bolts, locating pins) with reinforcing ribs for rigidity. Manufacturing involves resin sand casting (1480–1520°C pouring) followed by stress-relief annealing, with precision machining of the contact surface (flatness ≤0.1 mm/100 mm) and assembly holes. Quality control includes MT/UT for defects, hardness testing (≥200 HBW), and load trials to ensure ≤0.1 mm deformation under 1.2× rated load. With a 2–3 year service life, it ensures stable force transmission and equipment safety through strict process control.