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2. Leadscrew - Wikipedia

   en.wikipedia.org/wiki/Leadscrew

   6: square thread DVD drive with leadscrew and stepper motor Floppy disc drive with leadscrew and stepper motor. A leadscrew (or lead screw), also known as a power screw [1] or translation screw, [2] is a screw used as a linkage in a machine, to translate turning motion into linear motion.

3. Square thread form - Wikipedia

   en.wikipedia.org/wiki/Square_thread_form

   The square thread form is a common screw thread profile, used in high load applications such as leadscrews and jackscrews. It gets its name from the square cross-section of the thread. [ 1 ] It is the lowest friction and most efficient thread form, but it is difficult to fabricate.

4. Screw mechanism - Wikipedia

   en.wikipedia.org/wiki/Screw_mechanism

   - With its 28° thread angle this has higher friction than the square thread, but is easier to manufacture and can be used with a split nut to adjust for wear. [5] It is widely used in vises, C-clamps, valves, scissor jacks and lead screws in machines like lathes. (g) Buttress thread

5. Screw thread - Wikipedia

   en.wikipedia.org/wiki/Screw_thread

   The mechanical advantage of a screw thread depends on its lead, which is the linear distance the screw travels in one revolution. [1] In most applications, the lead of a screw thread is chosen so that friction is sufficient to prevent linear motion being converted to rotary, that is so the screw does not slip even when linear force is applied ...

6. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   The term fine adjustment screw typically refers to screws with threads from 40–100 TPI (Threads Per Inch) (0.5 mm to 0.2 mm pitch) and ultra fine adjustment screw has been used to refer to 100–254 TPI (0.2 mm to 0.1 mm pitch). These screws are most frequently used in applications where the screw is used to control fine motion of an object.

7. Lead (engineering) - Wikipedia

   en.wikipedia.org/wiki/Lead_(engineering)

   Lead is the axial advance of a helix or screw during one complete turn (360°) [1] The lead for a screw thread is the axial travel for a single revolution. [2] Pitch is defined as the axial distance between adjacent threads on a helix or screw. In most screws, called "single start" screws, which have a single helical thread along their length ...