Screw - torque
A screw is a mechanism that converts rotational motion to linear motion, and a torque (rotational force) to a linear force. It is one of the six classical simple machines. The most common form consists of a cylindrical shaft with helical grooves or ridges called threads around the outside.
The rotational force applied to the screw is actually a torque Tin=Fin*r. Because of this, the input force required to turn a screw depends on how far from the shaft it is applied; the farther from the shaft, the less force is needed to turn it.
The torque can be calculated from the shown formulaRelated formulas
|Fout||the force done on the load (N)|
|Tin||applied rotational torque (N*m)|
|η||efficiency of the screw (dimensionless)|
|l||lead of the screw (m)|