Difference between Hollow shaft and Solid shaft

Difference between Hollow shaft and Solid shaft

Difference between Hollow shaft and Solid shaft is one of the important comparisons in Design of Machine Elements. Here are the key Difference between Hollow shaft and Solid shaft.

Before looking into the difference, let us know what is a shaft?

What is a Shaft?

Any rotating member which is transmitting torque is called shaft.

It is an arrangement for the transmission of a couple applied at one end to appear at the other end without any appreciable twist in it.

For example, in the automobile such as buses, lorries and vans, the driving shaft (axle) transmits the power torque form engine to the wheel.

Difference between Hollow shaft and Solid shaft

Difference between Hollow shaft and Solid shaft

  • In the hollow shaft, the material at the center is removed and spread at large radius. Therefore, hollow shafts are stronger than solid shaft having the same weight.
  • The stiffness of the hollow shaft is more than the solid shaft with the same weight.
  • The strength of the hollow shaft is more than the solid shaft with the same weight.
  • The natural frequency of hollow shaft is higher than the solid shaft with the same weight.
  • The hollow shaft is costlier than a solid shaft.
  • The diameter of the hollow shaft is more than the solid shaft and require more space.
  • Hollow shafts are having a more polar moment of inertia, thus they can transmit more torque compared to solid shafts.
  • Hollow shafts do not transfer more power but the power to weight ratio of hollow shafts is more as compared to a solid shaft.
  • Solid shafts, when subjected to bending, are stronger than that of a hollow shaft.

Also read : Type of Springs

 

 

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