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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Bottom Brackets Brake Systems
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Sampson Bottom BracketSAMPSON STRATICS TITANIUM SPINDLED B/B
The Stratics is fixed spindle with dual adjustable fixed cups design. The Stratics model singular difference from the Colorado is its spindle. The Titanium spindle for this B/B has an oversized 21mm diameter middle section with four milled flutes along this oversized center. The spindle ends are bored to a 24mm depth and tapped 8mm x 1mm threads for the crank bolts. The spindle after machining is given a special exterior hardness treatment that elevates the spindle's resistance to flex and shearing. This treatment leaves the exterior of the spindle a Gold color. The bearing Sampson has chosen is the 6903RS size bearing that is so popular for B/B's. The cups found in the Colorado down to the high polish are again used her in the Startics. We found the Park SPA-1 Green spanner worked well for tightening them. With the spindle in place and each bearing cup tightened in place, the Sampson B/B uses two machined from aluminum rod lockrings which cinch down to the installed cup and hold it rigidly in place. The lockrings have six square notches cut in the perimeter for a lockring wrench or ring spanner (Park SPA-3) to turn it into final position. With the cups and lockrings now cinched into position Sampson includes two O-rings to be rolled externally down the spindle, which situate into a crevice between the cup and the spindle, to seal out contaminants. The Stratics is available for a 68mm wide B/B shell in 103mm, 108mm, 112mm, 116mm, 122.5mm, or 126mm. It's also made for a 73mm wide shell in 108mm, 113mm, 122.5mm and 126mm. The 112mm set weighs 170 grams, while the 126mm set weighs 184 grams. 68mm shell Spindle length-03-08-12-16-22-26 $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... |
