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.
|
Product Overviews |
Archive Reviews |
Comparison Tables |
Tables |
Metals Guide |
Frank's Picks |
News & Gossip
| |
| Additional Knowledgable Resources | |
|
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. |
|
|
Bottom Brackets Brake Systems
Computers Cranks and Chainrings Forks Frames & Framesets Freewheels and Cassettes Front Derailleurs Grips Handlebars Handlebar Extensions Headsets Helmets Hubs and Skewers Lubricants Metal Guide - Bicycle Metallurgy Mirrors Pedals and Toe Clips Pumps and Inflation Systems Racks Rear Derailleurs Rims & Rimstrips Saddles Seatposts and Binder Bolts SRP Replacement Titanium & Aluminum parts - Master Index Stems Tires Tubes Shoes Spokes (Tables Only) Tools - Bicycle Repair Tools Yakima Fit List -to fit all cars Notes Home |
Cook Brothers Bottom BracketsCOOK BROS. CRO-MOLY BOTTOM BRACKET
On the path of least resistance, Cook Bros. Bottom Brackets are lightweight and strong. Featuring quality sealed bearings and a precision ground heat-treated 4130 spindle (also available is a Titanium spindle version), this is a "set it and forget it" floating-type design. The bearing cups are machined from 7075 aluminum rod then anodized Black, into which Japanese KSK 6002RS precision sealed bearings cartridges are pressed from the outer side. The cups have the outer flange cut, creating parallel sides for a 35mm fixed cup wrench (Park HCW2 or equivalent), or less precisely an adjustable wrench, to grip. Both cups are threaded into place, then the spindle laterally slides through them and is adjusted to space the cranks properly. An aluminum locking collar is used on outer side of each of the cups to hold the spindle in place. The locking collar slides down the spindle next to the bearing, and each one is cinched down with two recessed allen head set-screws. The spindle is machined from 4130 Cro-moly rod leaving a 5/8" outer diameter, with tapered ends. The spindle is drilled through to reduce weight, then tapped for the crank bolts. This B/B comes with steel crank bolts. The Cook Bros. B/B with 120mm spindle weighs 273.5 grams (including the crank bolts and washers, which weigh 31 grams). The spindle is available in six lengths, 110, 115, 120mm, 124mm, 127mm, and 133mm. It will fit all aluminum crank arms, and is one of our most requested aftermarket replacement B/Bs. Cooks also make a press-in version for older Fat Chance or Klein frames, in fact Cooks is the only one to make a good aftermarket replacement for these. English only. Spindle Length-10-15-20-24-27-33 Cro-Moly $Price in Catalog |
|
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... |
