The manual shaft of SLR tripod is broken. Can it be replaced?

Most of the tripods with hand-cranked central shafts are old non-brand products, and I'm afraid they are shanzhai tripods with poor stability. Professional photographers are very concerned about the stability of shooting. In order to prevent Tik Tok, they generally don't raise the central axis, unless they use small machines such as micro-cameras and card machines, and dare to raise the central axis without the vibration of SLR mirrors.

In a word, it is better to buy a new one than to change the shaft.