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List of the contents of this article:

• 1, How long is the service life of the tire bolts
• 2, Don't tighten car screws too much
• 3、 The screw of the car tire is so thin. How can it bear the weight of the car?

How long is the service life of tire bolts

As long as it is disassembled and installed more than 10 times, it must be replaced. In large dump trucks, tire screws can be used up to 3 to 4 times, and then they can no longer be tightened. They must be replaced with new ones, otherwise the steel rim will be loose, causing the threaded holes to swell.

According to the forum of Aika Automobile Network, there is no service life of tire screws.For example, the number of disassembles and installations is increased, the service life increases, and whether the strength and durability of the screw will change. Is it necessary to replace it with a new one? Rest assured to use it. It is very durable. It is said that the car is broken, and the bolts can continue to be used.

Hello, under normal circumstances, the tire screw will not be broken. Generally, too much force will cause crack damage or screw mistooth and other problems that need to be replaced [If there is a problem with the car, ask the car master. 4S store professional technician, 10 minutes to solve.

How often is it appropriate to replace the tires? Normally, car tires need to be replaced once between 4 and 5 years of use, or when the car mileage reaches 60,000 kilometers and 80,000 kilometers, the car tires need to be replaced once.

Shake the jack to support the car body, remove the bolts of the tire, and then remove the wheels. RightPress the spare tire on the quasi-axle and screw hole, tighten the bolt diagonally, take out the jack, and complete the tire replacement.

Replacement according to the service life: the service life of tires is generally about 5 years. At this time, aging and cracking will generally occur, so time is a very important reference value. The production date on the tire is not like some ordinary products that indicate production on a certain day of a certain month of a certain year, but is explained in a four-digit number.

Don't tighten the car screws too much

Don't tighten the car screws too much Some car owners like to tighten the screws of auto parts by themselves, because they don't know much about it and will always tighten too tightly, which is actually wrong.

The reasons why the car screws can't be tightened too tightly are as follows: seal the originalCause: When sealing, the screw tightens the gasket, and the gasket is compacted and produces micro-deformation, so that the micro-gaps formed by machining on the surface of the connected object are fully filled, so as to achieve the sealing effect.

[Pacific Automobile Network] Because it is too tight, it is easy to cause the screw to slip. Generally speaking, the torque of the oil release bolt is 35Nm, and it can be screwed until there is no oil leakage. If the screw is too tight and the screw slips, resulting in oil leakage, and if the screw is broken, the oil sup shell may need to be replaced in serious cases.

Car nuts and bolts are not tightened the better. If they are too tight, it may affect the performance of the car, and even break the bolts and nuts. It's better to check the relevant information by yourself. It's always fake on the Internet. If you meet someone who pretends to know and answers casually, it will directly mislead you or even make you miserable.

The screw of the car tire is so thin. How can it bear the weight of the car?

The screw will bear a large shear force, which is obviously not in line with the characteristics of tire screws. Car tire screws are usually made of high-strength steel. The strength level of the screw is printed on the head of the tire screw, including 9 and 19. The higher the value, the higher the strength.

When installing the wheel, the hole in the center of the hub is just set on the axle head, and the two work together to bear the longitudinal load of the vehicle. The tire screw only fixes the hub tightly to the shaft head, and rarely withstands the longitudinal force. It can be clearly seen in the picture above that the center of the hub is set on the shaft head.

Evenly distributed between the four wheelsThe weight is about 300-500kg, and the actual rated bearing weight of the car hub will exceed 600-700kg. The surface of the hub looks thin, but whether it can withstand such a large weight mainly depends on two aspects: one is the structural design, and the other is the material.

An ordinary car is about 4 tons, plus the people and goods on the car, the total load capacity is about 5 tons, while the load of ordinary hubs is about 600-700 kilograms, so this is more than enough for a car.