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2. Weight plate - Wikipedia

   en.wikipedia.org/wiki/Weight_plate

   Weight machines commonly use specialized sets of plates (called "weight stacks"), consisting of a set of rectangular plates mounted on rails. Through a cable and pulley system, the burden is transferred to the machine's user. By placing a pin in the stack that causes the cable to pull on each plate above the pin, the weight is selected.

3. BUR Barbell Company - Wikipedia

   en.wikipedia.org/wiki/BUR_Barbell_Company

   It set consisted of a 4-1/2’ knurled pipe bar, dumbbells with fixed collars, and 110 pounds of weight plates. [14] Mid-1950s "BUR-140" Brochure. BUR-140 – The "BUR-140" is arguably the best known BUR product. It replaced the BUR-130. [15] Unlike previous BUR sets, the BUR-140 came with a 38-inch chrome-plated and knurled revolving barbell ...

4. Dumbbell - Wikipedia

   en.wikipedia.org/wiki/Dumbbell

   Selectorized dumbbells A set of fixed-weight dumbbells. ... that is filled with concrete. Adjustable dumbbells consist of a metal bar ... dumbbell (2.38 inches (60 mm ...

5. Rack unit - Wikipedia

   en.wikipedia.org/wiki/Rack_unit

   Rack with sample component sizes including an A/V half-rack unit. A rack unit (abbreviated U or RU) is a unit of measure defined as 1 + 3 ⁄ 4 inches (44.45 mm). [1] [2] It is most frequently used as a measurement of the overall height of 19-inch and 23-inch rack frames, as well as the height of equipment that mounts in these frames, whereby the height of the frame or equipment is expressed ...

6. Power rack - Wikipedia

   en.wikipedia.org/wiki/Power_rack

   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 ...

7. 19-inch rack - Wikipedia

   en.wikipedia.org/wiki/19-inch_rack

   The height of a rack can vary from a few inches, such as in a broadcast console, to a floor-mounted rack whose interior is 45 rack units (200.2 centimetres or 78.82 inches) high. 42U is a common configuration. Many wall-mounted enclosures for industrial equipment use 19-inch racks.