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Zoom Brahma Bar


ZOOM BRAHMA BAR

As mentioned in other parts of this book, Zoom is the brand name used by factory in Taiwan known as Hsin Lung. They are the maker of many parts used on a large number of bikes as original equipment, though the public when they buy one of these "complete" bikes never directly learns that Hsin Lung was a maker of the parts. It is always presumed that the name on the label on the side of the bike was responsible for its complete construction. Hsin Lung has a US presence in Santa Fe Springs, CA in the form of HL USA. The brand name Zoom was adopted to gain swifter acceptance and name recognition in the United States and European markets. The Brahma is made of 6061 aluminum alloy, (its temper is unknown), from tubing that would be called straight gauge, except the outer diameter in the area of the bar extension has been reduced. This external reduction or taper, prior to bending the tube, might have been milled away but appears as though it was removed by sanding. The center 2 inches of the Brahma is bulged, with horizontal knurls, bringing the outer diameter to the required 25.4mm standard for stem binding. The handlebar tapers down to a 22.2mm outer diameter and reduces further to just 19.4mm at the first bend creating the bar extension. The Brahma has a slight bend backward, starting at 1.2 inches from the center bulge on both sides, which produces the needed 5 degree bend for the handlebar area. The external taper begins 1 inch from the first bend creating the bar extension. The tapered tubing turns smoothly beyond a 90 degree angle ending slightly inward toward the front tire. A second bend in the bar extension curves the tubing upward slightly, leaving a Ski-Bend styled extension with 6 1/2 inches of grip area. The inner diameter of the tubing at the end is 15.2mm. Two Black plastic press-in end caps are provided for the tubing ends. The Brahma is made in three widths, 540mm, 560mm, and 580mm, which is factory measured center to center through the outer section of the bar extension. The 540mm size has an outermost curve to outermost curve measurement of 560mm and a weight including the 4.5 grams caps of 253 grams. The 560 has an outer/outer measurement of 578mm and a weight including the 4.5 grams caps of 254 grams. The 580 has an outer/outer measurement of 595mm, and a weight including the 4.5 grams caps of 262.5 grams. The Brahma has an anodized Black finish. Although most of the Black models have been anodized we have received several occasionally that have been painted Black.

Width -54-56-58 / Color-BK $ 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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