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Barbell Plate
A weight plate is a flat, heavy object, usually made of cast iron, that is used in combination with barbells or dumbbells to produce a bar with a desired total weight for the purpose of physical exercise. Two general categories exist: "standard" plates, which have a center hole of approximately 25 mm (one inch), and "Olympic" plates, meant to fit on the 50 mm (two inches) sleeves of Olympic barbells. Standard plates are usually paired with adjustable dumbbells and Olympic plates with full-size barbells, although standard barbells and Olympic dumbbells exist. Weight plates may incorporate holes for ease of carrying (called "grip plates") or be solid discs (especially those used for competition). Non-competition plates often have variable diameters and widths, such as on the adjustable dumbbells pictured right, with heavier plates generally being larger in diameter, thickness, or both. Weight plates are typically round, although 12-sided and other polygonal varieties exi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weightlifting
Weightlifting generally refers to activities in which people lift Weight training#Equipment, weights, often in the form of dumbbells or barbells. People lift various kinds of weights for a variety of different reasons. These may include various types of competition; promoting health and fitness; developing physical strength; or developing a muscular physique, possibly with the goal of engaging in competitive bodybuilding. According to an article in ''The New York Times'', lifting weights can prevent some disabilities, increase metabolism, and lower body fat. When compared to machines, free weights improve not only strength but muscle function as well. Lifting weights can also improve self-confidence and make people feel better about themselves. Weightlifting as a sport The goal of weightlifting competitions is usually the lifting of weights themselves, with the winner being determined by the amount of weight lifted, provided that they employ the correct movements in achieving t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chrome Plating
Chrome plating (less commonly chromium plating) is a technique of electroplating a thin layer of chromium onto a metal object. A chrome-plated item is called ''chrome''. The chromed layer can be decorative, provide corrosion resistance, ease of cleaning, or increase surface hardness. Sometimes, a less expensive imitator of chrome may be used for aesthetic purposes. Process Chrome plating a component typically includes these stages: * Degreasing to remove heavy soiling * Manual cleaning to remove all residual traces of dirt and surface impurities * Various pretreatments depending on the substrate * Placement into the chrome plating vat, where it is allowed to warm to solution temperature * Application of plating current for the required time to attain the desired thickness There are many variations to this process, depending on the type of substrate being plated. Different substrates need different etching solutions, such as hydrochloric, hydrofluoric, and sulfuric acids. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leg Press
The leg press is a compound weight training exercise in which the individual pushes a weight or resistance away from them using their legs. The term ''leg press machine'' refers to the apparatus used to perform this exercise. The leg press can be used to evaluate an athlete's overall lower body strength (from the gluteus Maximus to the lower leg muscles). It can help to build squat strength. If performed correctly, the inclined leg press can help develop knees to manage heavier free weights, on the other hand, it has the potential to inflict grave injury: the knees could bend the wrong way if they are locked during the exercise. It can be performed in variations, for example with one leg, or attaching bands to the leg press. Types There are two main types of leg press: * The diagonal (incline) or vertical 'sled' type leg press. Weight plates are attached directly to the sled, which is mounted on rails. The user sits below the sled and pushes it upward with their feet. These ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weight Machine
A weight machine is an exercise machine used for weight training that uses gravity as the primary source of resistance and a combination of simple machines to convey that resistance to the person using the machine. Each of the simple machines (pulley, lever, wheel, incline) changes the mechanical advantage of the overall machine relative to the weight. Stack machines A ''stack machine''—also called a ''stack'' or ''rack''—has a set of rectangular plates that are pierced by a vertical bar which has holes drilled in it to accept a pin. Each of the plates has a channel on its underside (or a hole through the middle, as visible in the picture) that aligns with one of the holes. When the pin is inserted through the channel into the hole, all of the plates above the pin rest upon it, and are lifted when the bar rises. The plates below do not rise. This allows the same machine to provide several levels of resistance over the same range of motion with an adjustment that r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olympic Lifts
Olympic weightlifting, or Olympic-style weightlifting (officially named Weightlifting), is a sport in which athletes compete in lifting a barbell loaded with weight plates from the ground to overhead, with each athlete trying to successfully lift the heaviest weights. Athletes compete in two specific ways of lifting the barbell overhead: these are the snatch and the clean and jerk. The ''snatch'' is a wide-grip lift, in which the weighted barbell is lifted overhead in one motion. The ''clean and jerk'' is a combination lift, in which the weight is first taken from the ground to the front of the shoulders (the clean), and then from the shoulders to overhead (the jerk). The clean and press, wherein a clean was followed by an overhead press, was formerly also a competition lift, but was discontinued due to difficulties in judging proper form. Each weightlifter gets three attempts at both the snatch and the clean and jerk, with the snatch attempts being done first. An athlete's score ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Permanent Marker
A permanent marker or indelible marker is a type of marker pen that is used to create permanent or semi-permanent writing on an object. In general, the ink comprises a main carrier solvent, a glyceride, a pyrrolidone, a resin and a colorant, making it water resistant. It is capable of writing on a variety of surfaces from paper to metal to stone. They come in a variety of tip sizes (ultra fine to wide), shapes (chisel point, bullet tip, and wide bristle), and colors (metallic, or ultraviolet reactive). Most markers have alcohol-based solvents. Other types, called paint markers, like spray paint, contain volatile organic compounds which evaporate to dry the ink. Due to compounds such as toluene and xylene often being present in permanent markers, they have a potential for abuse as a recreational drug. The permanent marker was invented in 1952 by Sidney Rosenthal. Applications General purpose They are used for writing on metals, plastics, ceramics, wood, stone, cardboard etc. Ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paint Pen
A paint marker is a type of marker pen that is used to create permanent writing on a variety of surfaces such as paper, metal, stone, rubber, plastic, and glass. Ink Unlike with most permanent markers the ink is an oil-based paint and generally requires shaking before use, similar to an aerosol spray paint can. In addition, the line is very opaque and, unlike spirit-based or other permanent inks, will not fade with exposure to UV light, and overlays all other colors beneath it. The paint from these types of markers is not truly permanent, as it can be removed using high pressure cleaning or paint thinning solvents such as acetone. Dangers Paint markers, and permanent markers generally, contain the toxic compounds xylene or toluene. Like spray paint, these markers give off volatile organic compounds, which can be dangerous when used in a badly ventilated area or without a particulate mask. Gloves can also be worn to avoid absorption through the skin. Solidified paint pens Another ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bumper Plate
A weight plate is a flat, heavy object, usually made of cast iron, that is used in combination with barbells or dumbbells to produce a bar with a desired total weight for the purpose of physical exercise. Two general categories exist: "standard" plates, which have a center hole of approximately 25 mm (one inch), and "Olympic" plates, meant to fit on the 50 mm (two inches) sleeves of Olympic weightlifting#Barbell, Olympic barbells. Standard plates are usually paired with adjustable dumbbells and Olympic plates with full-size barbells, although standard barbells and Olympic dumbbells exist. Weight plates may incorporate holes for ease of carrying (called "grip plates") or be solid discs (especially those used for competition). Non-competition plates often have variable diameters and widths, such as on the adjustable dumbbells pictured right, with heavier plates generally being larger in diameter, thickness, or both. Weight plates are typically round, although 12-sided and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hammertone
Hammer paint (or hammered paint) is a special lacquer with a surface that looks like hammered metal when dried. It is also known as hammertone. Composition The slightly iridescent areas are caused by the different orientation of very small shiny particles, which are suspended in the lacquer. These particles are often made of the mineral mica. Mica is resilient, reflective, refractive, dielectric, chemically inert, insulating, lightweight, and hydrophilic.Dolley, Thomas P. (2008"Mica"() in ''USGS 2008 Minerals Yearbook''. Alternatively, aluminium or bronze powder may be used. To make the "hammered" effect more pronounced, a small amount of silicone oil may be added directly before application. Purposes Hammer paint is often used to beautify technical apparatus or as a protective coating. The optical advantage of hammer paint is that surfaces look acceptable even if the underlying surface is not flat and smooth. To get a regular paint to look smooth, the surface would have to be p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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