Should the radius of the shaft shoulder be kept as small as possible?

Keeping the radius of the shaft shoulder sufficiently large is crucial for several reasons related to equipment maintenance and performance. A larger radius helps to distribute stress more evenly across the shaft shoulder, reducing the likelihood of stress concentrations that can lead to fatigue and failure.

Additionally, a well-rounded shoulder can facilitate the proper alignment and fitting of components, which is important in maintaining the overall integrity and function of machinery. A small radius may cause sharp transitions that can lead to premature wear or damage at critical points, negatively impacting the equipment's reliability. Therefore, maintaining an appropriately sized radius is essential for the longevity and effectiveness of mechanical systems.