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Archival Review of Mountain Goat Headset
MOUNTAIN GOAT SEALED NEEDLE BEARING HEADSETThis headset is made in Japan by Tange for Mountain Goat. It has both steel and aluminum construction. Both the bearing cup elements and the head lock nut are made of aluminum alloy. The cone races, the cup race elements, and the head key washer are all made of steel. This needle or roller bearing headset uses a fork cone race made of steel that the bearings actually roll on, instead of a separate removable race like many other roller bearing headsets have. Although other makers do this in aluminum (with steel races on top), both cone races in this headset are made of steel, with the roller bearings revolving on it. The cup pieces are produced the way most others are. They are cast, then cleaned up by machining before tapping the threads in them. Thin beveled steel races are then laid in the cups to provide the second bearing surface. The head key washer is actually recessed into the upper cup and head lock nut, making it more difficult to strip. Regarding this being a "sealed" headset. It is more in the nature of "Sealed Mechanism". The roller bearings are not part of any "precision sealed cartridge" system. The seals on this headset come in the form of black plastic skirts that snap around a lip on the steel cone races. There are twenty needle bearings in each of the retainers. This headset is available in a 1" diameter and in Black only. It weighs 129 grams. Mountain Goat stopped importing this headset in 1993. We sold it for $32.99 |
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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... |
