Screws

Some articles on screw, screws:

Lead (engineering)
... Lead is the axial advance of a helix or screw during one complete turn (360°) The lead for a screw thread is the axial travel for a single revolution ... 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, the lead and pitch are equal ...
Computer Case Screws - M3 Screw
... This screw is the second most common screw found in PCs ... It is a metric screw, and just about every case manufacturer provides a package of M3 screws as well as 6-32s ... Specifically, the screw type is M3-0.50, and the '0.50' indicates that the screw threads are 0.50 millimetres apart, which is much finer than the 1/32 in (0.79375 mm) pitch of 6-32 screws ...
Screwhead - Common Types - Robertson
... A Robertson, also known as a square, or Scrulox screw drive has a square-shaped socket in the screw head and a square protrusion on the tool ... the tool easier, and also tends to help keep the screw on the tool tip without the user needing to hold it there ... The taper's earliest reason for being was to make the manufacture of the screws practical using cold forming of the heads, but its other advantages helped popularize the drive.) Robertson screws are ...
Marine Propulsion - Screws
... Marine propellers are also known as "screws" ... There are many variations of marine screw systems, including twin, contra-rotating, controllable-pitch, and nozzle-style screws ... While smaller vessels tend to have a single screw, even very large ships such as tankers, container ships and bulk carriers may have single screws for reasons of fuel efficiency ...
Screw (simple Machine) - Lead and Pitch
... The fineness or coarseness of a screw's threads are defined by two closely related quantities The lead is defined as the linear distance the screw ... The lead determines the mechanical advantage of the screw the smaller the lead, the higher the mechanical advantage ... In most screws, called "single start" screws, which have a single helical thread wrapped around them, the lead and pitch are equal ...

Famous quotes containing the word screws:

    Each of us is full of too many wheels, screws and valves to permit us to judge one another on a first impression or by two or three external signs.
    Anton Pavlovich Chekhov (1860–1904)