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Control Tech Handlebars


CONTROL TECH ALUMINUM BAR

Control Tech toward the end of 1993 introduced two handlebars, an Aluminum alloy model made in the United States, and a Russian made Ti handlebar. The aluminum model is made from a 7075 aluminum tube that serves a blank The piece of tubing has a 25.4mm outer diameter which is reduced as the piece is cold worked through a process called swaging, which squeezes the tubing between rotating rollers of a smaller diameter, forcing the tube to gain length while it reducing the outer diameter to the 22.2 required for the grips to slide on. The swage process also tapers the wall thickness from thick at the middle to thin toward the ends. Once the piece has been swaged the handlebar is bent, in this case Control has chosen 4 degrees as the compromise for the bend in all of their bars. After bending the bar, Control sends the handlebars out to a heat treat facility to elevate the temperature just below melting so the alloy can gain a temper from solution heat treatment, (read our Metals section to learn more). To eliminate any slight surface imperfections, the handlebar is "shot peened", which is a process of shooting tiny steel balls at the surface to make a fine, tiny dimple giving the piece an even texture. The shot peening process also relieves any remaining surface tension from the cold work. Finally the bar is anodized in one of 5 colors, Blue, Black, Green, Lavender or Silver. We cut a Control aluminum bar in half lengthwise to make some wall thickness measurements. In the front and rear bulge walls we found the wall thickness was 1.86mm. At the bend the thickness was 1.62mm front and 1.64mm rear. Over the remaining 7 1/4" (185mm) the wall thickness tapered to 1.15mm The Control bar is 23" (585mm) long and weighs 158 grams.

Color-B-BK-GN-L-S $ Price in Catalog





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...


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