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A power rack (also known as a power cage, squat cage or squat rack) is a piece of weight training equipment that functions as a mechanical spotter for free weight barbell exercises without the movement restrictions imposed by equipment such as the Smith machine. Its general design is four upright posts with two adjustable horizontal bar catches ...
A rack and pinion has roughly the same purpose as a worm gear with a rack replacing the gear, in that both convert torque to linear force. However the rack and pinion generally provides higher linear speed — since a full turn of the pinion displaces the rack by an amount equal to the pinion's pitch circle whereas a full rotation of the worm screw only displaces the rack by one tooth width.
The ETSI rack is defined by the European Telecommunications Standards Institute (ETS 300 119). The distance of the right edge of the right mounting rail to the left edge of the left mounting rail is 535 millimetres (21.1 in). As 535 mm is very close to 21 inches, these racks are sometimes called 21-inch racks. The gap between the posts is 500 ...
A lifting hook with a safety latch. A lifting hook is a device for grabbing and lifting loads by means of a device such as a hoist or crane.A lifting hook is usually equipped with a safety latch to prevent the disengagement of the lifting wire rope sling, chain or rope to which the load is attached.
A universal joint. A universal joint (also called a universal coupling or U-joint) is a joint or coupling connecting rigid shafts whose axes are inclined to each other. It is commonly used in shafts that transmit rotary motion.
3U (5.06 inches or 128.5 mm), where height "U" is measured in rack units, rounded for a lip (nb: 3U in standard rack units would be 5.25 inches or 133.3 mm). 1HP (0.2 inches or 5.08 mm), where width "HP" is measured in horizontal pitch units. A card width is generally integer multiples of 1HP, although some manufactures work in multiples of 0.5HP.
A coat rack A free-standing hatstand and umbrella stand. A hatstand is a device used to store hats and often coats on, and umbrellas within. Usually made of wood and standing at least 5 feet (1.5 m) tall, they have a single pole making up most of the height, with a sturdy base to prevent toppling, and an array of lengthy pegs at the top for placement of hats.
A pipe rack is the main artery of a process unit. Pipe racks carry process and utility piping and may also include instrument and cable trays as well as equipment mounted over all of these. [2] Pipe racks consist of a series of transverse beams that run along the length of the pipe system, spaced at uniform intervals typically around 20 ft. To ...
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