"Types of Fit" is a crucial concept in mechanical engineering, defining the relationship between two mating parts concerning their tolerances and clearances. In engineering design and manufacturing, achieving the right fit is essential for functionality, performance, and longevity of mechanical systems. Interference Fit: This type of fit occurs when the dimensions of the shaft are larger than those of the hole. As a result, when the parts are assembled, there is interference or overlap between the mating surfaces, creating a tight and secure connection. Interference fits are commonly used in applications where maximum load transmission and resistance to loosening or vibration are required, such as press fits for gears and bearings.