🔍 Key Concepts

• Difference between radial and axial loads on a shaft • Function of a thrust collar and thrust pads/elements in a turbine bearing • How turbine rotor motion is transmitted to the ship’s propeller through end thrust

💭 Think About

• Look at the direction in which the thrust collar would try to move relative to the stationary thrust elements. Is that along the shaft or across it? • Ask yourself: does this bearing support the shaft like a journal (around its circumference), or does it mainly resist movement of the shaft in the endwise direction? • In a turbine‑driven shaft line, which type of force has to be controlled to keep the rotor from walking forward or aft in the casing?

✅ Before You Answer

• Identify whether the bearing surfaces are arranged around the shaft’s circumference (for radial support) or against a collar face (for endwise support). • Decide if the load path shown is parallel to the shaft centerline or perpendicular to the shaft centerline. • Confirm whether any feature in the drawing is actually restraining side-to-side (radial) movement of the shaft, or only its endwise (axial) movement.