Now the tire business is not good, and some tire shopkeepers try their best to increase passenger flow. Especially the content of the door, is a "bitter" kung fu.

What is a wind cannon?

Many tire repair shops on the roadside have brands of wind cannon tire repair, and many people don't know what it means. In fact, the air cannon is a pneumatic tool for tire removal, not a method for tire repair. Dismantle the tire with an air cannon, and then choose the tire repair method that the owner wants.

The air cannon is definitely a car repair artifact. Auto repair itself is heavy physical labor. Auto mechanics often use pneumatic wrenches (air cannons) or pneumatic screwdrivers, which can greatly reduce the physical burden, save time and greatly improve work efficiency.

However, the wind cannon is mostly used for the tires of freight cars, because the tires of big cars are very tight, and it is not easy to disassemble without the wind cannon, which is more laborious. With the wind cannon, the efficiency is higher, indirectly telling others that I have the wind cannon here, which can repair the tires of the cart.

Application of air gun tire repair

If it is a big truck or bus, it is necessary to use this kind of wind cannon. After all, the tires are big, the screws are thick, and they are also very resistant to rotation. But if it is a car, many experienced tire shopkeepers do not recommend it. Why?

Air cannons can easily damage the bolt.

This is the problem, because the air cannon is driven by air pressure, so it is doomed to be unable to provide stable output torque like an electric wrench, and it is difficult for the air cannon to effectively fix the torque. If the temperature in use is not well grasped, it is easy to cause certain damage to the bolt. Although this kind of injury rarely happens, it does not represent a universal phenomenon, and individual phenomena still exist.

Considering that bolts of different specifications and qualities have their specified bearing torque range, which cannot exceed the bearing distance range, otherwise the bolts will slightly twist and slip, and will be directly unscrewed or tightened for a long time, leading to fatigue fracture of the bolts. Therefore, the general air gun is rarely used for disassembling bolts with strict torque requirements, and is generally used for tightening and disassembling tire bolts in auto repair, like the "air gun tire repair" we often encounter.

Improper operation and how to use it correctly

As mentioned above, it is no problem to remove or tighten bolts with air cannon, and the problem is often that the operator does not use the air cannon correctly. Only the correct use of air cannon can put an end to the problem. The air pressure of the air cannon is too high, and the tightening torque greatly exceeds the bearing torque of the bolt. If the truck's air cannon is used in the car, something will definitely go wrong.

If you are inexperienced or careless, it will not only break the bolt, but also make the bolt slip easily. Of course, it may also cause the bolt to be tightened too tightly, which will make it difficult to remove the tire next time. Generally speaking, ultra-fine products, an automobile mechanic who has not been employed for a long time, have a strong sense of safety and understand the importance of strong tire bolts. No one can afford to lose the tires when they run, so they hit them back and forth with a wind cannon.

Or it has been tightened, but it has been made up a few times with a bang. Perhaps because of these "bangs", the latch is broken; There are also some impatient auto mechanics who beat the bolts with air cannons when the bolts are not completely aligned with the bolt holes, causing thread damage and even bolt fracture. Before using the air cannon, it is best to screw the bolt several times by hand to ensure that the thread will not be damaged.

Difficulties in using wind cannons

It's not good if the tire bolts are loose or too tight. This is the difficulty. If you are really afraid of not grasping well, you can control the trigger appropriately. When the bolts are tightened to the end, your fingers will quickly get off the trigger and then tighten them one by one with a torque wrench, which can prevent accidents. Generally, the tightening torque of tire bolts of small cars varies according to different models, but most of them are in the range of 90 nm- 120 nm.

Therefore, although air cannon tire repair is good, it needs to be used with caution, especially for small vehicles!