Jaw Crusher swing Jaws

The swing jaw is a core load-bearing component of jaw crushers, driving the swing jaw plate to reciprocate via connection to the eccentric shaft (upper) and toggle plate (lower). Structurally, it comprises a box-shaped main body, bearing seat, toggle plate seat, and reinforcing ribs, typically made of high-strength cast steel (e.g., ZG35CrMo). Its manufacturing involves resin sand casting (1520–1580°C pouring) followed by normalizing and tempering (hardness 180–230 HBW). Machining includes precision milling of key faces, boring/grinding of bearing seats (IT6 tolerance, Ra ≤0.8μm), and fitting of wear-resistant liners. Quality control covers material testing (chemical composition, impact energy ≥30J), UT/MT for defects, dimensional checks (parallelism, perpendicularity), and assembly trials. With a 5–10 year service life, it ensures stable crushing under high loads