Inside our factory workshop, the buzz of machinery mixes with workers’ focused efforts—creating a busy yet organized scene. Here, we follow strict precision and quality standards across the entire production of high-quality marine propeller cap fins, from raw material processing to final inspection.

Sand moulds are critical for casting accurate fins. Workers fill custom, flexible-yet-strong moulding sand into dies, compact it mechanically, and trim cavity edges. This ensures the sand mould matches the fin’s design exactly. Once dried, it’s used for alloy pouring to shape the fin. (Insert on-site images: workers operating equipment or a close-up of a finished sand mould cavity.)

Small but powerful, these fins cut ship energy waste: they absorb rotational energy from propeller wake, turning it into forward torque, and reduce hub vortices to lower resistance. Tests show they cut fuel use by 3%-5%, while reducing propeller noise and vibration for smoother sailing.

From sand moulds to delivery, we focus on quality to make reliable, efficient boss cap fins. Using strict processes and expertise, we supply top-tier energy-saving parts for the marine industry.