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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Tioga Bottom Brackets
TIOGA MTB-SK SEMI-SEALED BOTTOM BRACKETThe "Semi-sealed" in this name is what the bearing community calls "sealed mechanism". In this case, they are cartridge bearings with one of the sealed sides removed. Remembering that "Tioga" is only a marketing company, we will tell you that Sugino of Japan makes this bottom bracket. It is a "dual adjustable cup with fixed length spindle" design, which permits fine lateral adjustments. The spindle is made of cast steel, that is nickel plated, after the bearing races are precision ground. This spindle uses cast Black steel nuts to fasten the crank arms instead of bolts that thread into the spindle. The bearing cups are made of cast steel that are chrome plated, having six holes on the face for final pin spanner adjustments. The lockrings for each cup are made of steel, the left one is chromed, while the right is painted Black to identify each, as the threads reverse each other. In the cups are sealed bearing cartridges that have the seal on one side, and the center circular axle removed. With these pieces gone, it makes a very elaborate and secure bearing structure with 11 ball bearings in a retainer. The sealed side of the bearing, naturally faces to the outside, and is enclosed by the bearing cup. A Black plastic water sleeve is included with this B/B, and makes a tidy yet inexpensive solution to B/B replacement. The spindle comes in only one length, which is 130mm, but the floating nature permits lots of adjustment. The weight of the Tioga MTB-SK, with nuts and sleeve, is 376 grams. $Price in Catalog |
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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... |
