The Marine Propeller Casting is an important component used in marine propulsion systems for boats, small vessels, fishing boats, workboats, and other watercraft. Its main function is to convert rotational power from the engine or motor shaft into forward or reverse thrust by pushing water through the movement of its blades.

Based on the image, this component has a four-blade curved design, a central hub bore, and an internal keyway slot for shaft fitting. The blade shape is designed to move water efficiently while maintaining smooth rotation and balanced performance. The central hub allows the propeller to be mounted securely on the shaft, while the keyway helps lock the propeller in position during operation.

This type of component can be manufactured using marine-grade aluminum alloy, bronze, stainless steel, or other corrosion-resistant materials depending on the vessel type and application. Since marine components operate in water, corrosion resistance, strength, dimensional accuracy, and smooth finishing are very important.

After casting, the propeller may go through machining, bore finishing, keyway cutting, blade finishing, polishing, and balancing to ensure proper fitment and vibration-free performance. It can be customized according to customer drawing, sample, diameter, blade angle, bore size, material grade, and surface finish requirement.