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desertfox, Background – The purpose of the rod is to prevent a hollow steel shaft from breaking. The rod is 2.5 inches in diameter. There is 4 inches of threads (2.5”-4) on each end of the rod. The material of the rod is steel 4142. The entire rod is heated with 1 nut already secured flush...

How do you calculate the compressive forces on a rod that is inserted into a hollow shaft? The rod is held in place by nuts on both ends.

The crane should have wheels so that it can travel on the floor.

What factors and approaches should I consider in designing a mobile overhead crane? The finished product should be able to be disassembled for transport. Also, the crane should be able to move around on wheels and allow for vertical adjustment. My biggest concern is determining what kind of...