Some basic knowledge of hub
Hub is an important part of the car, a lot of fans and sometimes more difficult to identify the difference between it and the right tire, in fact, "wheel" and "tire" is completely different from different auto parts, the so-called "tire" that car "wheels "Among the rubber part, it is the software itself; and to support the tire in the tire profile of barrel-shaped, the center shaft is mounted on the component called a hub. Wheels distinguish the type of material usually can be divided into three categories: steel wheels, aluminum wheels and magnesium alloy wheels, three in the manufacture and use of their advantages and disadvantages: The main advantages of steel wheel manufacturing process is simple, relatively cost low, strong anti-metal fatigue, but the shortcomings are obvious, such as weight, large inertial resistance, heat resistance is poor, and so on; and the alloy wheels the advantage of light weight, high manufacturing precision, high strength, low inertial resistance, heat ability, good visual effects, etc., the disadvantage is the manufacturing process exhaust manifold manufacturer is complicated and costly.
The following figures for the steel wheels (on) and alloy wheels (below). Whether it is by the composition of seven parts which material manufacturing hub, namely rim: tire assembly with the support of the tire wheel portion; spoke: the axle hub to implement installation and connection, support rims wheel portion; Offset: rim center plane ring in contact with the tire, supporting the maintenance of radial tire rim portion; bottom:: For the convenience of assembly and disassembly of the tire, the rim distance between the spokes to the mounting surface;:; rim bead seat to maintain and support the direction of the tire rim portion the valve hole; leave some depth and width of the pit: Install tire valve hole.
Each hub will have some fixed parameters, these numbers roughly determine the quality of good or bad wheel, as to how to interpret these data, a detailed examples are listed below: for example, a hub for the 17 × 8J, PCD 5 × 120, CB72.56, ET38, namely size wheels size is 17 inches, the size of the wheel width of 8 inches, PCD on behalf of the pitch turbocharger uk, 5 × 120 representatives of five fixed screw holes around the circle diameter of 120; a plane ET38 on behalf of the hub installation disk from the hub centerline distance 38mm; CB pitch on behalf of the center, the data is common, usually a value of 73.1; another wheel shape can be divided into pieces by type wheel and fork-type wheels, etc., generally called amplitude greater than ten pieces Multiple-style hub for the graph below are five bifurcated hub and ten Formula wheels.
