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Carbonworks Handlebar
CARBONWORKS MOUNTAIN ASSAULT BARCarbonworks based in the central valley of California has developed a relationship with an aerospace engineer fearful that further job cuts in his industry would leave him out of work. The answer was to develop a partnership in making and selling Carbon Fiber based replacement parts for bicycles. Their handlebar has been highly successful. The Mtn Assault isn't made in the traditional carbon fiber fashion. It's made of a thermo-plast material that has as its basis a braided carbon fiber. This braided material, unlike other carbon fiber material requires no further epoxy resin to harden and give structure to the finished product. This "non-pre-pregnation" carbon fiber material when heated within a steel to a particular elevated temperature cures, and hardens. The fiber material is layered over and around an inflatable form, which gives it the approximate finished shape. The Mtn Assault has a 6061 aluminum tube at the bulge to absorb and dissipate some of the stem's stress. The interior of this bulge tube is said to be threaded to hold it in position during the cure phase. Each end of the bar also has very thin aluminum rings with interior threads. These rings at the bar end are to absorb added compression stress from handlebar extensions. With all the parts in place, the partially set material is put into a two piece mold that heats and forms the outer shape of the bar. With the metal mold heated, and the inflatable form forcing the fiber material toward the outer walls, the bar heats, cures and hardens to its final shape and weight. The center bulge has a 25.4mm outer diameter, with the aluminum tube covering 1 1/2" of the bulges 2" length. The diameter reduces to 22.2mm for grip installation toward the bar end. The two piece mold leaves two fine lines, one on the front the other on the rear, running the length of the handlebar, (like the Klein bars using "proprietary" techniques). The Mtn Assault is 22 1/4" (585mm) long, has a 3 degree bend and weighs 125 1/2 grams. Each bar is tested before leaving Carbonworks to make sure that, though light, meets certain safety criteria. The bar has a dark Grey color. This handlebar is no longer available. We sold it for $89.99 |
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In-depth Information About Metals Aluminum Aluminum is extracted electrolytically from bauxite ore. It is made by the electrolysis of aluminum oxide which is found in larger concentrations within bauxite ore. Bauxite is a mixture of the hydroxides of aluminum, together with other impurities such as oxides of iron, titanium, and silicon. Bauxite is produced by the weathering and change of aluminum silicate rocks usually found in tropical and semitropical regions where climate has produced an accelerated weathering process. Bauxite is not a rare ore and is widely available in the US, the Caribbean, and Europe. Approximately 4 pounds of read the full article... Beryllium Beryllium is a specialty metal that is steel-grey metal in color, with an extremely low density, making it very light weight. At 1.85 grams to the cubic centimeter, its density compares to that of magnesium. It is also a high strength metal, making it possible to design light weight, thin membered parts with ahigh stiffness. A column made of beryllium to support a load placed directly downward on top of it, will have a greater load carrying capacity, and be lower in weight than any other metal of equal size. Until the 1950's beryllium was used read the full article... Titanium The element titanium was discovered in 1763 by an English cleric, William Gregor who was an amateur chemist with an inquiring mind. It was in the black sands of Cornwall that he discovered the new element that had up to that time, attracted little scientific interest. A few years later, an Austrian, Klaproth, extracted the same element from an ore widely known as "rutile", which is a mineral consisting of titanium dioxide (one titanium atom, two oxygen atoms), that is a reddish-brown substance with a slight metallic luster. While rutile is the highest grade read the full article... Metallurgic Hardness Testing There are three types of tests used with accuracy by the metals industry,they are the Brinell hardness test, the Rockwell hardness test, and the Vickers hardness test. Hardness is the property of a metal which gives it the ability to resist being permanently deformed (bent, broken, or have its shape changed), when a load is applied. The greater the hardness of the metal, the greater resistance it has to deformation. Since the definitions of metallurgic ultimate strength and hardness are rather similar, it can generally be assumed read the full article... |
