So the paper not only seems useful to deep-sea cobalt crust mining, but also offers a new design method and powerful tool for traditional spiral drum cutting head's parameters designing.

The paper determines the rational range of a new spiral rotary drum's rotation speed through theoretically analyzing the critical speed of the drum in a coal machine.

This article mainly introduces a program of calculating the spiral vanes in the drum of concrete mixer truck, and gives a detail explanation about the program's input, output and functions.