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No Longer Made
SHIMANO DEORE DX REAR DERAILLEURThe DX series components were discontinued in the 1994 model year, and the LX series was elevated to its price position. We believe there will be on hand DX stocks through at least the end of 1994. The Shimano DX rear derailleur is an STI compatible unit using the Double Servo-Panta mechanism. It can be used as both a 6, 7, and 8 speed changer. It's double spring tension points guarantee quick and accurate shifting. This has sealed link pivots, mounting bolt and mounting spring. It uses Shimano's "sealed" pulleys, has B-tension adjustment, and protection against overshifting into the spokes of your rear wheel. The DX series has an adjustment cam/bolt for the return spring which adjusts the force used to push the derailleur back from the high to the low geared cog. The convenience adjuster, is easy to grip with a large Black plastic jacket around a steel bolt, with detent at each quarter turn. A 5mm hex wrench will tighten both the cable fixing bolt and the mounting bolt. The DX has Silver alloy linkages and Silver steel parts, (mounting and pivot bolts, pulley bolts and pulley cage). This model is made in two sizes, a short cage and a long cage version. Maximum rear cog is 32 teeth on the long cage, and 28 teeth on the short cage. Total capacity is 38 teeth (super long cage), and 28 teeth (short cage). It's made of aluminum alloy and steel weighing 318.5 grams for the long and 261.5 grams for the short cage. No longer made, both versions of the DX sold for $34.99 |
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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... |
