Jaw Crusher Toggle Plates

**Abstract** The jaw crusher toggle plate (thrust plate) is a critical force-transmitting and overload protection component, typically made of gray cast iron (HT200/HT250) or malleable cast iron (KT350-10). Structurally, it consists of a body, support ends, reinforcing ribs (if applicable), and weakening grooves (for controlled fracture). Its manufacturing involves sand casting (with melting at 1380–1420°C, heat treatment for stress relief), machining (precision finishing of support ends and weakening grooves to ensure fit accuracy), and strict quality control (material composition checks, MT for cracks, dimensional inspections, and strength testing of weakening grooves). Functioning to transmit force and protect the crusher from overload by fracturing when overloaded, it ensures operational safety with a 3–6 month service life.