Wheel Hub Bolt Lug Stud Nut

Product Description

hub bolt

The role of the hub bolt is to install the parts of the axle, used to support the tire, buffer the external impact, realize the contact between the tire and the road surface, transfer the body weight to the road surface, bear the lateral load, driving force and braking force torque when turning, and ensure the driving performance of the vehicle.

The role of the hub bolt is to install the parts of the axle, used to support the tire, buffer the external impact, realize the contact between the tire and the road surface, transfer the body weight to the road surface, bear the lateral load, driving force and braking force torque when turning, and ensure the driving performance of the vehicle.

The role of the hub bolt is to install the parts of the axle, used to support the tire, buffer the external impact, realize the contact between the tire and the road surface, transfer the body weight to the road surface, bear the lateral load, driving force and braking force torque when turning, and ensure the driving performance of the vehicle.

The structure of the tire screw is very simple, which is composed of screws, nuts and washers. According to the different screw structure, it can also be divided into single-headed bolts and double-headed bolts, the vast majority of cars are now single-headed bolts, and double-headed bolts are generally used in small and medium-sized trucks. There are two kinds of single-head bolt installation, one is the hub bolt + nut, the bolt is fixed on the hub with interference fit, and then the wheel is fixed by the nut, the general application of Japanese and Korean series car is more, the vast majority of trucks also use this way. The advantage of this method is that the wheel is easier to locate, the wheel is easier to disassemble, and the safety is higher. The disadvantage is that the tire screw is more troublesome to replace, and some need to remove the wheel hub; The other is the wheel fixing bolt, the thread is directly processed on the wheel hub, and the tire screw is directly screwed on the wheel hub, which is generally used more in European and American small cars. The advantage of this method is that the tire screw disassembly and replacement is relatively easy, the disadvantage is that the safety is slightly poor, if repeatedly disassembly the tire screw, it will damage the thread on the wheel hub, so it must be replaced.

Automobile tire screws are generally made of high-strength steel, and the strength level of the screws is printed on the head of the tire screws, there are 8.8, 10.9, 12.9, and the larger the value, the higher the strength. Here 8.8, 10.9, 12.9 refers to the performance grade label of the bolt, which is composed of two parts, respectively, indicating the nominal tensile strength value and the strength ratio of the bolt material, generally expressed by "X.Y", such as 4.8, 8.8, 10.9, 12.9 and so on. The tensile strength of bolts with performance grade 8.8 is 800MPa, the bending strength ratio is 0.8, and the yield strength is 800×0.8=640MPa. The tensile strength of bolts with performance grade 10.9 is 1000MPa, the bending strength ratio is 0.9, and the yield strength is 1000×0.9=900MPa.

And so on. Generally, the strength of 8.8 and above, the bolt material is low carbon alloy steel or medium carbon steel, and the heat treatment is called high strength bolts. Car tire screws are high-strength bolts, different models, different load, matching bolt strength is also different, 10.9 is the most common, 8.8 is generally matched on the lower end of the model, 12.9 is generally matched on the heavy truck.