What is the primary purpose of a shaft collar?

The primary purpose of a shaft collar is to locate components on a shaft. Shaft collars are used to secure other components, such as gears, pulleys, or bearings, in a specific position along the length of the shaft. This positioning is crucial for maintaining proper alignment and function within machinery or systems, as it ensures that moving parts operate smoothly and efficiently.

By providing a reliable point of reference, shaft collars assist in preventing axial movement of components, which can lead to wear or failure of the equipment if not correctly aligned. Additionally, they help in simplifying the assembly or disassembly of machinery, making maintenance easier.

While other options are associated with mechanical functions—such as the transmission of power, reducing friction, or supporting bearings—locating components is the fundamental role of a shaft collar, making it essential for proper mechanical function.