Three minutes to tell you whether to change the brake pads?
As we all know, the brake system is very important to the safety of the car, which consists of three parts: brake pads, brake discs, and brake calipers. The brake pads are the most critical parts, and the brake pads play a decisive role in the quality of all braking effects, so good brake pads are the protectors of cars and people.
There are two main types of brake systems in cars: disc brakes and drum brakes. Now the front wheels of cars all use disc brakes, and more and more rear wheels use disc brakes. The advantage is that the braking feeling during high-speed braking is faster and more natural than that of the drum brake, and the heat dissipation effect is better; the drum brake has the advantages of less wear of the brake pads, lower cost and easier maintenance. Therefore, it is widely used on the rear wheels of economical cars.
Brake pads are also called brake pads. Brake pads are now mainly divided into the following categories:
Asbestos brake pads (basically eliminated), semi-metallic brake pads, metal-less brake pads, NAO formula brake pads, ceramic brake pads, NAO ceramic brake pads!
In addition, regardless of the material of the brake pads, there are the following materials:
Binder+fiber+filler+regulator+friction enhancer+lubricant
Ordinary brake pads are made of semi-metal and metal-less materials. The brake pads made of these materials have relatively low high temperature resistance, are easy to rust, have relatively hard base materials, and are easy to be damaged. Brake discs produce abnormal noises and poor comfort. The main features of ceramic brake pads are strong braking force, high temperature resistance, good thermal stability, low dual wear, and much better performance than ordinary brake pads. It has been adopted by some foreign high-end cars.
Since the frequency and strength of braking are different for each driver, it is difficult to define how often the brake pads need to be replaced. However, the replacement mileage of conventional brake pads is about 25,000-30,000 kilometers per driving. In mixed driving conditions (half highway, half urban), the brake pads on the front wheels should last 60,000 to 70,000 kilometers. The brake pads on the rear wheels should last for more than 100,000 kilometers. Of course, this is not absolute, but an approximate estimate of the average. So, under what circumstances can we judge that the brake pad must be replaced?
1. When the thickness of the brake pad is less than the minimum replacement standard allowed in the vehicle manual.
2. Make a computer alarm or metal friction screeching sound.
3. When the brake pads are abnormally worn or broken.
Good brake pads have a good braking effect, and the driver can drive more easily; bad brake pads make abnormal noise when driving, and are not durable. For the safety of you and your family, you should choose better brake pads and replace them in time.
