A lead screw is known as a power screw or translation screw, is a screw designed to translate radial motion into linear motion. They find their use in machine slides (such as in Lathe machines), Vices, Screw Presses, and Jacks etc.
For more thrust applications, you require a larger diameter screw . That's because the screw is similar to a column subject to compression and tension. During compression, the screw should not bow or deflect. And during tension, the screw must support the load without failing.
screw
The lead of a screw refers to the distance a screw advances in one complete turn. It is determined by the screw's pitch, which is the distance between corresponding points on adjacent threads. A screw with a larger lead will advance more with each turn compared to one with a smaller lead.
when lead of the screw is equal to the pitch it is called single threaded screw
The lead screw moves the turret by a precise increment for every rotation of the screw. This allows the machine to generate threads in a workpiece, to generate precise length and diameter dimensions, and to maintain a constant rate of metal removal.
presuming you mean the lead screw on a lathe, used when cutting threads on the workpiece, then the screw itself is obviously fixed, but the rotation of it may be able to be changed, depending on the lathe manufacturer.
Sometimes the propeller on a boat is called a screw & they used to be made of lead. So they would be found at the end of the propeller shaft.
what is a leadscrew
First step: Find the core diameter of the screw second step: Find the torque required for lifting the screw
the leadscrew is used for thread cutting on a lathe
Linear and rotational
A lead screw is a type of screw that converts rotational motion into linear motion. As the screw is turned, it moves along its axis, allowing it to move a nut or other component in a straight line. This mechanism is often used in applications where precise linear motion is required, such as in CNC machines and 3D printers.
linear distance moved by the gear(worm,screw jack) for one rotation of the gear(worm,screw jack)