Lead screw


  • Webster's Revised Unabridged Dictionary
    • Lead screw (Mach) the main longitudinal screw of a lathe, which gives the feed motion to the carriage.
    • ***


In literature:

The exhaust valves are placed on the leading, or air-screw side, of the engine, in order to get the fullest possible cooling effect.
"A History of Aeronautics" by E. Charles Vivian
There was poor old Jim a-lookin' as if he was goin' to be hanged, with a chap leading the screw he was on, and Jim's long legs tied underneath.
"Robbery Under Arms" by Thomas Alexander Browne, AKA Rolf Boldrewood
On new wire, when I fix my compensator, I usually have an adjusting screw on the lead to lever.
"Scientific American Supplement, No. 286" by Various
By the aid of the jack-screw and levers, we raised and brought to the shore two large pieces of lead from the raft.
"The Swiss Family Robinson; or Adventures in a Desert Island" by Johann David Wyss
The steel leading screw is 11/2 inches in diameter by 1/4 inch pitch.
"Scientific American Supplement, No. 421, January 26, 1884" by Various
Inspector Val took from his pocket three pieces of steel, each about the size of a lead pencil, and began screwing them together, end for end.
"The President" by Alfred Henry Lewis
The leadsman was ordered to sound, as the screw was stopped, and he reported sixteen fathoms with the deep-sea lead.
"Stand By The Union" by Oliver Optic
The discs are made by pouring lead round the screw-nose of the mandrel.
"On Laboratory Arts" by Richard Threlfall
The wire, 10, leads from Y to the back of the base, where it is carried up to a screw, 12, which holds it to U.
"How Two Boys Made Their Own Electrical Apparatus" by Thomas M. (Thomas Matthew) St. John
Each screw is dipped in white lead before inserting, and the head afterward puttied over.
"Harper's Young People, April 27, 1880" by Various

In news:

The folded-over linear rail contains all the components needed for a complete motion subassembly, including the stepper motor , belt and pulley, precision lead screw, bearing supports, and rail with load carriage.
Spark plug wire loom holders wrap around ignition leads 50/50 with two machine screws locking the halves together.

In science:

According to the Kruskal-Shafranov criterion (Kadomtsev 1966), this leads to the screw instability when the toroidal field becomes so strong that the magnetic field line turns around itself about once.
Flares on the Black Holes