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The plates provide a surface with a low coefficient of friction which can be attached to a supporting structure. This combination provides support while simultaneously allowing an object to move (slide) freely along the supporting surface. [1] The plate may be of polytetrafluoroethylene (PTFE),TEF-MET, [2] Lubrite [3] or steel according to the ...
Constant lead barrel cam in an American Pacemaker lathe. This cam is used to provide a repeatable cross slide setting when threading with a single-point tool. A cylindrical cam or barrel cam is a cam in which the follower rides on the surface of a cylinder. In the most common type, the follower rides in a groove cut into the surface of a cylinder.
It uses the same modular components as the Close Support Bridges. A standard bridge set is carried, launched and recovered from 3 specialist vehicles (1 x Automotive Bridge Launching Equipment (ABLE) and 2 x Bridging Vehicles (BV). Up to 44m of bridge can be built using this system, although only 32m is possible with the 3 vehicle combination.
The first passenger rail cars in North America to be equipped with retractable bridge plates were TriMet's (Portland, Oregon) Siemens SD660 LRVs, [2] the first of which were completed in 1996. [3] Earlier, in 1987, the newly opened SacRT light rail system used non-powered, station-platform-mounted bridge plates to bridge the gap between a high ...
Linear bearing: This bearing provides linear motion; it may take the form of a circular bearing and shaft or any other two mating surfaces (e.g., a slide plate). [3] Thrust bearing: A thrust bearing provides a bearing surface for forces acting axial to the shaft. [3] One example is a propeller shaft.
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Expansion joint on a bridge. A expansion joint, or movement joint, is an assembly designed to hold parts together while safely absorbing temperature-induced expansion and contraction of building materials. They are commonly found between sections of buildings, bridges, sidewalks, railway tracks, piping systems, ships, and other structures.
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