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.
Linear and rotational
Yes. Totally reversible.
A screw picker is a small tool used to handle small screws during small intricate repairs. The screw picker has a small claw that can be extended and grasp the small screw to twist it in place.
symbol for screw down non return valve
The pozidrive screw is a modified phillips head screw that can be used in almost any application. It has 4 additional cuts in the head and it takes a special tool to remove them although a regular phillips head screwdriver will work if they are not very tight.
Screw jack is a non reversible machine,as it does not return to its original position even after the load is applied
Examples are Screwing in a screw - Unscrewing a screw Opening a door - Closing a door etc. Hope this helps
screw
A lead screw is used to transfer circular motion into linear motion as the lead screw engages with a nut
when lead of the screw is equal to the pitch it is called single threaded screw
Kiomi
is a screw designed to translate turning motion into linear motion.
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.
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
Tranylcypromine (a reversible MAOIs). This drug can lead to insomnia and agitation.
reversible