Excavator swivel joint 739802000019 swivel cycle 750550000099

Excavator slewing joint (739802000019) slewing cycle (750550000099)

The excavator slewing joint (also known as the central slewing joint) is a key component of hydraulic excavators. It connects the hydraulic lines between the upper and lower frames, ensuring reliable transmission of hydraulic oil during 360° continuous rotation while preventing line entanglement. Its multi-channel internal oil passage design allows for simultaneous transmission of hydraulic oil, gas, or other fluids, ensuring that the hydraulic systems between the slewing platform and chassis do not interfere with each other during relative motion. Typical applications include complex motion scenarios such as excavator boom rotation and crane arm rotation. It primarily consists of a housing, core shaft, rotary seal, and gland. The housing is fixed to the center of the slewing bearing. The core shaft connects to the lower frame piping. Annular grooves and vertical oil passages interact to achieve multi-path fluid transmission.