Core structural function
As the core load-bearing structure connecting the excavator's slewing platform (body) and boom, it bears multidirectional loads during boom operation while allowing left-right articulation driven by hydraulic cylinders.
Materials and processes
Material: Typically manufactured as a single-piece casting using high-strength cast steel (ASTM A27-65, SC 480)
Heat Treatment: Normalizing + Tempering to ensure impact resistance and fatigue strength 12.
Manufacturing and quality controlMachining:
4-axis CNC machining for complex geometries
Inspection: CMM (Coordinate Measuring Machine) verification to guarantee dimensional accuracy
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