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Roller chain. Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire - and tube - drawing machines, printing presses, cars, motorcycles, and bicycles.
The shoe size is directly proportional to the length of the foot in the chosen unit of measurement. Sizes of children's, men's, and women's shoes, as well as sizes of different types of shoes, can be compared directly. This is used with the Mondopoint system (USSR/Russia and East Asia).
Bicycle chain. Roller chain and sprocket. A bicycle chain is a roller chain that transfers power from the pedals to the drive- wheel of a bicycle, thus propelling it. Most bicycle chains are made from plain carbon or alloy steel, but some are nickel-plated to prevent rust, or simply for aesthetics.
A metric ISO screw thread is designated by the letter M followed by the value of the nominal diameter D (the maximum thread diameter) and the pitch P, both expressed in millimetres and separated by a dash or sometimes the multiplication sign, × (e.g. M8-1.25 or M8×1.25). If the pitch is the normally used "coarse" pitch listed in ISO 261 or ISO 262, it can be omitted (e.g. M8). [4]: 17 The ...
Since metric threads specify the pitch directly, the correct tap drill diameter for metric-sized taps is computed with: where is the tap drill size, is the major diameter of the tap (e.g., 10 mm for a M10×1.5 tap), and pitch is the pitch of the thread (1.5 mm in the case of a standard M10 tap) and so the correct drill size is 8.5 mm.
Chain. A common metal short-link chain. Roller chains. A chain is a serial assembly of connected pieces, called links, typically made of metal, with an overall character similar to that of a rope in that it is flexible and curved in compression but linear, rigid, and load-bearing in tension. A chain may consist of two or more links.
A chart of Imperial and United States customary units. The barleycorn is an English unit of length [1] equal to 1⁄3 of an inch (i.e. about 8.47 mm). It is still used as the basis of shoe sizes in English-speaking countries.
A thread pitch gauge with metric Tr 30 threads (30 mm diameter, 6 mm pitch, tolerance class 7e). In case of the trapezoidal thread form the angle is 30° instead of 29°. [5][6] All dimensions are in millimeters. [5][6] Trapezoidal threads are defined as follows by ISO standards: Tr 60×9 where Tr designates a trapezoidal thread, 60 is the nominal diameter in millimeters, and 9 is the pitch in ...