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EnglishOvertightening of bolts: a potential source of danger
The original intention of the design of round head knurled hub bolts is to increase the friction with the wheel hub hole through its unique knurled surface, thereby providing a stronger tightening effect. However, when the bolts are overtightened, this advantage may become a safety hazard. Overtightened bolts will produce excessive prestress, causing tiny cracks or deformations inside the metal material. Over time, these damages will gradually accumulate and eventually cause the bolts to break. More seriously, the broken bolts may instantly lose their fixing effect on the wheel, causing the wheel to fall off, seriously threatening driving safety.
In addition, overtightened bolts may also cause damage to the wheel hub. Wheel hubs are usually made of metals such as aluminum alloys or cast iron, which are prone to deformation or cracking when subjected to excessive pressure. Once the wheel hub is damaged, it will not only affect the balance and stability of the wheel, but may also cause more serious traffic accidents.
Bolts too loose: a hotbed of safety hazards
Compared to overtightening, bolts too loose is also a problem that cannot be ignored. Too loose bolts mean that the connection between the wheel and the hub is not tight enough, which will cause the wheel to wobble or deflect during driving. When driving at high speed, this wobble will intensify, which will not only affect the handling of the vehicle, but also cause abnormal wear of the tire. More seriously, too loose bolts may cause the wheel to fall off in extreme cases, directly threatening the life safety of the driver and passengers.
In addition to the direct safety risks mentioned above, too loose bolts may also trigger a series of chain reactions. For example, the wobble of the wheel will increase the burden on the suspension system and cause the suspension components to age faster; at the same time, abnormal tire wear will also increase the risk of tire blowout. These factors work together to greatly reduce the overall performance and safety of the vehicle.
Accurately control torque: the key to protecting driving safety
In order to avoid the safety hazards caused by overtightening or loosening the bolts, the torque must be accurately controlled when installing the round head knurled wheel hub bolts. This requires maintenance personnel to use a professional torque wrench during the installation process and strictly follow the torque value recommended by the vehicle manufacturer. The torque wrench can accurately measure and apply the predetermined torque value to ensure that the bolts are neither too tight nor too loose.
In addition, maintenance personnel should also regularly inspect and maintain the vehicle's bolts. After driving for a period of time, the bolts may loosen due to vibration and wear. Therefore, regular inspection and retightening of the bolts is one of the important measures to maintain vehicle safety.
