A flat component attached behind the propeller (screw) that determines the direction of the ship’s movement.

The rear block of the ship’s body through which the shaft from the engine passes and the propeller is mounted. It often has a streamlined structure, requiring high levels of machining and welding techniques.

A shaft that connects the hull and the rudder, and allows the rudder to rotate.

Shafts used to transmit power from the engine to the propeller.

A bearing device installed on the hull side to support the rudder stock (rudder shaft). It requires precise machining techniques.

Installed around the stern frame, this component efficiently draws seawater to the propeller, enhancing propulsion force.

Roll forming processing involves heating thick steel plates with a burner and then cooling them with water spray to induce thermal expansion and contraction, thereby forming curved surfaces. Among shipbuilding blocks, shaping the curved surface of the stern is considered the most challenging task, requiring highly skilled craftsmanship and experience.

A high level of adhesion is required at the fitting joint of the machined parts of the rudder blade and rudder shaft. Simply machining them results in processing errors of about 0.01mm to 0.05mm, which do not achieve the required level of adhesion. Therefore, a fitting operation by skilled craftsmen, known as “fitting work,” is necessary for the cutting work on the contact surfaces. This is an extremely meticulous and delicate task that takes several years to a decade to master.