How did the hub come from?
A long time ago, the prototype of hub appeared. Our common stones and stakes are ancient means of transportation, and then the wheels on the carriage. The appearance of automobile hub also evolved from carriage. Moreover, the early wheel hub has a feature that the whole wheel is densely covered with spokes, similar to a bicycle wheel. Moreover, the concepts of hub and rim are very clear in this period, unlike the hub we are talking about now, including the whole between tire and axle.
/kloc-at the end of 0/9 and the beginning of the 20th century, rims, hubs and spokes began to be integrated by casting technology, and the hub style began to change, which was followed by the steel hub we are going to use now. Steel wheels are characterized by heavy and simple appearance and single color matching. With the development of automobile industry, it seems to be out of tune with design.
In 1930s, the technical breakthrough in Germany laid the foundation for the development of aluminum alloy wheels. 1958, the whole cast aluminum alloy wheel hub appeared, and now most models on the market are equipped with aluminum alloy wheels. Aluminum alloy wheels are characterized by diverse shapes and light weight, which is a qualitative leap compared with steel wheels.
Here, let's talk about some interesting things about rims. Although simple and practical, its face value is really low enough, which really doesn't match the appearance of many models, so someone invented a "beautification" tool-wheel hub cover, and the installation effect was immediately different. However, with the popularity of aluminum alloy wheels, now the hub cover is only equipped on some entry-level low-profile models, but it is completely mismatched on pickup trucks or micro-surfaces. Up to now, the modes of hub have emerged one after another, and there have been many changes and progress from process technology to modeling design.
What is the hub made of?
At present, most of the steel wheels and aluminum alloy wheels used in the market are made of various metal materials. Except for the different design styles and types of wheels, many parts are the same, mainly composed of wheels and spokes. In addition, all wheels contain many parameters, such as side groove level, weighing level, hole spacing, offset, width and so on. Just like a tire, the hub also has information points, but the information points of the hub are usually displayed inside, so you should observe them carefully. If you know the above information, you will know how to choose your own tires.
The main parameters of automobile hub are: hub size, PCD, offset et and center hole.
Hub size consists of two parameters: tire ring diameter and tire ring width. The expressions are15x6.515x6.5jj15x6.5j1565, etc. There are no hard and fast rules on the format. The front "15" indicates the bead diameter, indicating that the bead diameter of the hub is 15 inch, and the back "6.5" (or 6.5J, 6.5JJ, 65) indicates the bead width, indicating that the bead width of the hub is 6.5 inches. The size of the hub can usually be found on the letters on the back of the hub.
PCD: refers to the pitch circle diameter of the hub bolt hole. 5x 1 14.3,10x100/14.3 and other expressions, "5" indicates the number of bolt holes, that is, there are five bolt holes. "1 14.3" means that the pitch circle diameter of the bolt hole is114.3mm..
Offset: (also called offset or et) is the distance between the mounting surface and the center line of the hub, usually located on the back of the hub. Offset is used to adjust the wheel trajectory to ensure that the wheel will not interfere with the body.
Central hole: it is the big hole in the middle of the hub. Please note that the correct data is the size of the center hole measured from the back. Every car is different. Mercedes-Benz is generally 66.6MM, and BMW is generally 72.6 mm If the axle hole of the rim is large, the middle hole ring must be used, otherwise the wheel will shake at high speed.
There are generally three situations for car owners to upgrade their tires: 1. Keep the wheel hub diameter and only change the tire width. 2. Keep the tire width and only change the wheel hub diameter. 3. Widen the tire width and increase the wheel hub diameter. Through the formula: hub diameter x25.4+ tire width x flatness rate x2 (the rim diameter is inches, which needs to be converted into mmmm, 1 inch =25.4mm), the hub can be replaced with reference to the corresponding table of hub width and tire. Only after the correct calculation can we choose the right tire.
As for the purchase of wheels, in addition to paying attention to the corresponding parameters, try to choose brands and formal channels, such as buying low-priced wheels and high-imitation wheels online. Don't believe it. It's useless to look good, and it's not good to use fakes. In addition, the models on the market will be equipped with a variety of wheels according to different configurations. Some automobile brands can also provide personalized choices to meet the needs of consumers. Of course, the price can't be lower, but the advantage is that the wheels are original.
Maintenance method of wheel hub
1, daily cleaning, using the correct detergent.
Maintaining a wheel hub is like maintaining a car. Many household vacuum cleaners have too strong adsorption on the wheel hub surface to be used. Automobile wheels need professional cleaning agents. Do not let any reinforcing agent or tire cleaner contact the wheel, otherwise it will cause permanent damage to the wheel surface.
Don't clean the wheels when they are hot.
Don't wash the wheels with cold water when it is very hot. Wait for the wheels to cool down. To prevent the wheel surface from being scratched, do not use rough towels. If automatic cleaning agents are used, please be sure not to use steam cleaning agents or chemicals for cleaning, otherwise it may cause permanent discoloration or corrosion. Carefully clean the tires with steel wool or a stiff brush. These abrasive materials should not touch the hub.
3. Clean the aluminum wheel hub.
Clean the coated aluminum wheel hub with professional wheel hub cleaner and dry it with a soft cloth. Polished aluminum wheels are generally not included in the warranty terms, and more maintenance is needed to maintain the original brightness, otherwise the surface will slowly fade. After proper cleaning, the surface should be coated with corrosion-resistant products to maintain its brightness. Wheel wax can be used after electroplating wheel cleaning to reduce cleaning times and protect the wheel hub surface.
Common repair methods of damaged wheel hub
1. The edge of the hub is scratched and damaged.
This situation is more common, and it is easy to scratch the edge when driving against the curb. In this case, only a special repair rod is needed to repair it.
2. There are cracks and damages on the rim of the wheel hub.
When a car is accidentally hit by a hard object while driving, the rim of the wheel hub will break. Usually, the hub can be repaired by a special aluminum welding machine for the hub, and then the hub is refurbished and reshaped after welding.
3. Hub Edge Clearance
When the wheel hub is hit by a stone or a hard object, the edge of the automobile wheel hub will be hit into a gap, so it needs to be filled with special wheel hub filling ash. Because of its super adhesion, it is not easy to peel off after repair.
4. The wheel hub is deformed.
When the automobile hub is hit or impacted, it is easy to cause the bending deformation of the automobile hub rim, which is a serious damage. As long as the internal structure of the hub is not damaged, it can be corrected by plastic repair and special straightener (if the deformation is too serious, it is recommended to replace the hub directly).
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