Casting manufacturers introduce the difference between brake pads and brake discs

The brake system achieves the effect of braking by generating friction between the brake pads and the drum or disc. The current mainstream family car brake forms are: brake pads and brake discs. So what exactly do these two things do? Next, Che Yi'an will talk briefly for everyone.

Brake pads:
It is generally composed of steel plate, adhesive heat insulation layer and friction block. The heat insulation layer is composed of materials that do not transfer heat, and the purpose is to insulate (it will easily cause the brake system to burn if overheated). The friction block is composed of friction material and adhesive. When braking, it is squeezed on the brake disc or brake drum to generate friction, so as to achieve the purpose of vehicle deceleration and braking. Due to friction, the friction block will gradually be worn.
Casting processing

Brake disc:
To put it simply, it is a round plate that rotates when the car is moving. The brake caliper (the brake pad friction block mentioned above) clamps the brake disc to generate braking force. When the brake is stepped on, it clamps the brake disc to slow down or stop.

What is the difference between brake pads and brake discs? Everyone knows the principle of bicycle brakes. As long as the brake is squeezed by hand, the two brake pads clamp the bicycle wheel to achieve the purpose of bicycle braking. Similarly, the brake system of a car is relatively complicated, but the principle is the same. When you are driving, the action of stepping on the brake is equivalent to the cyclist pinching the brake. Therefore, the brake shoes of the car drive the brake pads, so that the rotating brake disc generates friction and achieves the braking effect. Therefore, the simplest difference between them is that the brake discs are rotating like the wheels, but the brake pads are never moving.

So since the two components use friction braking, there must be losses. If it is worn out, it must be used to a certain extent and needs to be replaced. Generally speaking, brake pads are divided into front brakes and rear brakes, and replacement depends on the inspection results. Brake pads are generally inspected every 5000 kilometers. If the friction block loss is less than 1 mm, it needs to be replaced. (Generally speaking, the brake pads should be replaced every 30,000-40,000 kilometers)

The replacement cycle of the brake disc can be determined according to the number of replacements of the brake pads. Usually, the brake disc needs to be replaced every time the brake pad is replaced twice. However, it depends on the inspection result. (Generally speaking, the brake disc is replaced once for 60,000-80,000 kilometers)

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