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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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Syncros Bottom BracketsSYNCROS PRO SERIES TITANIUM SEALED BOTTOM BRACKET
Our Canadian friends at Syncros make a precision built, sealed bearing bottom bracket with a Titanium spindle. The Syncros Pro Series B/B is the more traditional of their two "dual adjusting cup - fixed length spindle" type B/Bs permitting fine lateral adjustments in the spindle for a perfect chainline. The Spindle is machined from Ti 6Al-2Sn-4Zr-6Mo Titanium rod. The piece is well machined with tapered ends for easy arm installation. Turned on a lathe, the spindle has a flat rise making a shoulder for the bearing cartridge to be pushed against and seat to. The sealed bearing cartridges are machine pressed onto the spindle. After the first bearing is in place, a machined Black plastic water sleeve, slides into place over the spindle and the second bearing is pressed into place. The water sleeve has recessed O-rings at each end that seat into the aluminum bearings cups. Between the two bearings, the spindle is turned to a narrower diameter, reducing its weight. The spindle is drilled through with threads tapped for the crank bolts. Each of the aluminum bearing cups is machined from aluminum rod. The cup piece is bored from the inside so the sealed cartridge butts against the outer cup wall. On the outside each cup has 6 holes drilled into the surface for a pin spanner to make the final cup adjustments. There is a recess with an O-ring installed where the spindle exits the bearing cup to reduce contaminants from outside. The lockrings for each cup are machined from 3.65mm thick aluminum plate, with 6 cuts for the B/B spanner wrench to grip while tightening. The left lockring is anodized Gold and the right is anodized Black. The Syncros Pro Series B/B uses French made SKF bearings, model 61903-2RS. It comes with English threads, with spindle lengths of 103mm, 105mm, 107mm, 109mm, 111mm, 113mm, 117.5mm, 122.5mm, 127mm, or 131mm. The weight of Syncros Pro Series B/B 122.5mm spindle is 171 grams. Crank bolts are not included. Spindle-03-05-07-09-11-13-17-22-27-31/T You need to call for price |
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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... |
