Before understanding the difference between a shaft and an axle, you should have a clear idea of what these parts actually are, what and where they are used for and what functions they perform. So, as you know, shafts and axles are designed to hold rotating parts on them.
Val - this is a part of the mechanism that has the shape of a rod and serves to transfer torque to other parts of this mechanism, thereby creating a general rotational movement of all parts located on it (on the shaft): pulleys, eccentrics, wheels, etc.
Axle is a part of the mechanism intended for connecting and fastening together the parts of this mechanism. The axis only accepts transverse loads (bending stress). Axles are fixed and rotating.
The main difference between the axle and the shaft is that the axle does not transfer torque to other parts. It is only influenced by transverse loads and is not subject to torsional forces.
The shaft, in contrast to the axle, transmits useful torque to the parts that are attached to it. In addition, the axles are both rotating and stationary. The shaft always rotates. Most shafts can be divided according to the geometric shape of the axis into straight, crank (eccentric) and flexible. There are also crankshafts or indirect shafts, which are used to convert reciprocating movements into rotational ones. The axes in their geometric shape are only straight.
- The axis carries the rotating parts of the mechanism, without transferring any torque to them. The shaft transfers useful torque to other parts of the mechanism, the so-called rotating force.
- The axis can be either rotating or stationary. The shaft is only rotating.
- The axis has only a straight shape. The shape of the shaft can be straight, indirect (cranked), eccentric and flexible.