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2. Caster - Wikipedia

   en.wikipedia.org/wiki/Caster

   Large diameter caster wheels are able to bridge gaps like that between the floor and an elevator car. However, the larger the diameter of a caster wheel, the higher the caster support arm must be. Either the base of a low-hanging object must be lifted higher above the wheels, or the casters must hang out to the sides straddling the low-hanging ...

3. Screw thread - Wikipedia

   en.wikipedia.org/wiki/Screw_thread

   The pitch diameter of a thread is measured where the radial cross section of a single thread equals half the pitch, for example: 16 pitch thread = 1 ⁄ 16 in = 0.0625 in the pitch actual pitch diameter of the thread is measured at the radial cross section measures 0.03125 in.

4. Centerlock wheel - Wikipedia

   en.wikipedia.org/wiki/Centerlock_wheel

   These consist of a shaft at the hub, with an external screw thread, a straight external spline section and a tapered interface at the hub base. The wheel centers have internal splines and a matching taper to align and center them on the hub. The wheels are fastened to the hub by means of a winged, threaded nut, called a "knock-off" or "spinner."

5. Thread (computing) - Wikipedia

   en.wikipedia.org/wiki/Thread_(computing)

   A process with two threads of execution, running on one processor Program vs. Process vs. Thread Scheduling, Preemption, Context Switching. In computer science, a thread of execution is the smallest sequence of programmed instructions that can be managed independently by a scheduler, which is typically a part of the operating system. [1]

6. Threading (manufacturing) - Wikipedia

   en.wikipedia.org/wiki/Threading_(manufacturing)

   In manufacturing, threading is the process of creating a screw thread.More screw threads are produced each year than any other machine element. [1] There are many methods of generating threads, including subtractive methods (many kinds of thread cutting and grinding, as detailed below); deformative or transformative methods (rolling and forming; molding and casting); additive methods (such as ...

7. Lead (engineering) - Wikipedia

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

   Definition of lead per ANSI/AGMA 1012-G05 Definition of lead angle per ANSI/AGMA 1012-G05 Depiction of the lead angle of a screw thread. d m is the mean diameter of the screw thread. 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.