Reach BikePro on a 24 hour basis at 803-280-1537 Terry Dunbar is on duty as the technical expert, who also speaks Spanish as well as English and has quantities on hand information. Call her now for any questions about Bike Pro you may have.
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Reach BikePro on a 24 hour basis at 803-280-1537 Terry Dunbar is on duty as the technical expert, who also speaks Spanish as well as English and has quantities on hand information. Call her now for any questions about Bike Pro you may have. |
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Kore Aheadlite Aheadset Stem
KORE has manufactured in Taiwan by Kalloy an Aheadset stem made from 6061-T6 aluminum alloy. When the on hand supply of the Taiwan models is out in the needed size small runs of the stem are made in Los Angeles, California so there is a possibility of a USA made stem. The Aheadlite uses an aluminum extrusion for the binder tube assembly, which is slightly eliptical in cross section. The narrow side of the elipse is solid, with a hole through the wide area. The narrow, solid part is what the binder fitting will be made from. The extrusion is turned on a lathe to trim away the excess aluminum around both sides of what becomes the binder fitting leaving a 10mm x 12.5mm rounded protrusion at the bottom. The protrusion is bored to recess the binder bolt head, then drilled through in a smaller diameter and tapped. A hole is drilled through the binder tube which faces into the extension tube, to relieve heat and stress when welded to the extension. The extension is made from aluminum tubing, both ends are swaged to make them ovalized in opposite directions, wider horizontally at the binder and taller vertically at the fork steerer. The vertical clamping tube is machined from seamless drawn tubing that has a wall thickness of 11.75mm (.4625"). KORE uses a CNC machine to cut away all but 3.18mm (.125") of the wall thickness on the circumferfence except a small area at the rear of the vertical clamping tube. The area of the remaining thickness is used for two clamping bolts. The thick area is drilled to recess the bolt head 13mm from each end. The Aheadlite uses three of the same bolts for both the binder and clamp. They're made of stainless steel with 6mm x 1mm pitched threads, have a 5mm hex head, are 16mm long and each weigh 5 grams. The Aheadlite is made in 1", 1 1/8" or 1 1/4" sizes. The stem comes in three lengths, 120mm, 135mm, or 150mm. All three come in a 0 degree or +10 degree rise, additionally the 120mm length comes in a +25 degree rise. The Aheadlite is after polishing is annodized Black or Clear (Silver). The 135mm long Aheadlite with a 10 degree rise weighs 172.5 grams. |
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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... |
