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 |
Kona O-Beam SeatpostKONA O-BEAM TITANIUM SEATPOSTThe Kona O-Beam uses a revolving clamp inside an outer cradle tube to permit tiny yet infinite adjustments in the angle of the saddle. The O-Beam Titanium is made using a Titanium 3Al-2.5V for the both the tubing section and the cradle section of the post. The tubing section rises with a miter cut end that contours the cradle tube. The cradle tube and the mast section are TIG welded together by clean ,delicate welds around the entire circumference of the joint. The Cradle tube has an outer diameter of 1 1/4". At the front and back of the cradle tube a cinch fitting is TIG welded, with a single continuous clean weld around the entire joining surface. The cinch fittings are machined from Titanium rod that isdrilled to recess the cinch bolt head, then tapped for the bolt threads. After the fittings are welded to the cradle tube, the upper half of the tube and both fittings are cut through, creating the outer clamping system that holds the actual saddle rail clamps. The saddle rail clamps are machined from a piece of solid aluminum alloy that is turned on a lathe to make it round with a 1 1/2" outer diameter, and cut a 15/100" deep recess in the middle 1 1/4" section of the piece. The aluminum is then drilled with a 7/10" in diameter hole, this reduces the final weight of what will be two saddle rail clamps. It is then cut through end to end, making the two clamp pieces. The ends of each piece are cut at a 52.2 degree angle eliminating further weight and giving the clamp pieces an aesthetically pleasing look. They are milled on the flat side at each end with a half-round bit to make the troughs for the saddle rails. Very clever and clean. The two bolts are made of steel and have 6mm by 1mm thread pitch, are 20mm long and weigh 6 grams each. With the clamp perpendicular to the tubing section, the center of rail to end of tube length is 381mm. The weight of a 27.2mm Kona O-Beam Titanium post is just 230 grams. The O-Beam Titanium post, at the moment, is only made in the 27.2mm diameter size. Made in Washington state, USA. $ 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... |
