Hollow shafts, also known as tubular shafts or hollow cylindrical shafts, are cylindrical-shaped components with a hollow interior. They are widely used in various industries for applications where weight reduction, flexibility, or the passage of fluids or wires is required. These offer a lighter alternative to solid shafts, making them beneficial for applications where weight reduction is important, such as in the automotive and aerospace industries. The hollow interior of the hollow shafts provides flexibility, allowing for the passage of fluids.