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2. Ball screw - Wikipedia

   en.wikipedia.org/wiki/Ball_screw

   A typical ball screw may be 90 percent efficient, versus 20 to 25 percent efficiency of an Acme lead screw of equal size. Lack of sliding friction between the nut and screw lends itself to extended lifespan of the screw assembly (especially in no-backlash systems), reducing downtime for maintenance and parts replacement, while also decreasing ...

3. 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 ...

4. Screw thread - Wikipedia

   en.wikipedia.org/wiki/Screw_thread

   Lead is the distance along the screw's axis that is covered by one complete rotation of the screw thread (360°). Pitch is the distance from the crest of one thread to the next one at the same point. Because the vast majority of screw threadforms are single-start threadforms, their lead and pitch are the same. Single-start means that there is ...

5. List of gear nomenclature - Wikipedia

   en.wikipedia.org/wiki/List_of_gear_nomenclature

   Lead is the axial advance of a helix gear tooth during one complete turn (360°), that is, the Lead is the axial travel (length along the axle) for one single complete helical revolution about the pitch diameter of the gear. Lead angle is 90° to the helix angle between the helical tooth

6. Screw mechanism - Wikipedia

   en.wikipedia.org/wiki/Screw_mechanism

   Lead and pitch are the same in single-start screws, but differ in multiple-start screws The fineness or coarseness of a screw's threads are defined by two closely related quantities: [ 5 ] The lead is defined as the axial distance (parallel to the screw's axis) the screw travels in one complete revolution (360°) of the shaft.

7. Leadscrew - Wikipedia

   en.wikipedia.org/wiki/Leadscrew

   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. Because of the large area of sliding contact between their male and female members, screw threads have larger frictional energy losses compared to other linkages.