Hydraulic swivel joint is a mechanical component designed specifically for the transmission of hydraulic oil, gas, or other fluids. It allows fluid to be safely and effectively transferred between stationary and rotating parts in rotating machinery. Its core structure includes internal channels, sealing systems, bearings, and housing. The design of these components must ensure that the fluid transmission inside the joint will not leak or cause malfunctions under high-speed rotation or high pressure. Hydraulic swivel joints can withstand pressures of up to several hundred bars, while maintaining high efficiency even at rotational speeds of thousands of revolutions per minute, making them suitable for extremely demanding hydraulic systems. The sealing system inside this joint can prevent liquid leakage while maintaining rotational stability, which is crucial for high-pressure systems.