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.
screw
when lead of the screw is equal to the pitch it is called single threaded screw
screwdriver(lever), screw(screw), flagpole(pulley)
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.
That would be a "phillips" heades screw.
screw
The number of revolutions needed to move a screw block 1 inch depends on the screw's lead, which is the distance the screw moves linearly with one full revolution of the crank. For instance, if the screw has a lead of 0.1 inches, it would take 10 revolutions to move the block 1 inch. To determine the exact number of revolutions, you would divide 1 inch by the lead of the 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
screwdriver(lever), screw(screw), flagpole(pulley)
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.
what is a leadscrew
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.
An example of a screw would be a jarlid.
An example of a screw would be a jarlid.
A screw has 7 sides and 7 angles. therefore a heptagon can be found as a screw