Which type of loading acts parallel to the axis of rotation in a bearing?

Which type of loading acts parallel to the axis of rotation in a bearing?

• A. Radial
• B. Thrust
• C. Bearing Loads
• D. Axial

Answer: (B)

Loading that acts parallel to the bearing’s axis is called a thrust (axial) load. This direction pushes along the length of the shaft, along the axis around which the bearing rotates, and it is what thrust bearings are designed to carry. In contrast, radial loads act perpendicular to that axis and are resisted by the bearing’s radial stiffness. The term bearing loads is too generic and doesn’t specify direction, while axial is a broad term that can be used for any load along the axis; in bearing terminology, the specific term used for axis-parallel loading is thrust. So the correct choice highlights the axial/along-axis nature of the force, which is exactly what thrust describes.

Loading that acts parallel to the bearing’s axis is called a thrust (axial) load. This direction pushes along the length of the shaft, along the axis around which the bearing rotates, and it is what thrust bearings are designed to carry. In contrast, radial loads act perpendicular to that axis and are resisted by the bearing’s radial stiffness. The term bearing loads is too generic and doesn’t specify direction, while axial is a broad term that can be used for any load along the axis; in bearing terminology, the specific term used for axis-parallel loading is thrust. So the correct choice highlights the axial/along-axis nature of the force, which is exactly what thrust describes.